What is the cylinder compression of a mercruiser 7.4 mpi engine?

Cars & Vehicles

MY Mercruiser 502 8.2L V8 between 133-155 pounds pressure dry, not warmed up & throttle at idle instead of wide open throttle. I was comparing the difference between the cylinders seeing if anything was obvious bad...

Warmed up... Open throttle valve will give you a higher reading.

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What is the diffrence of a 350 gm and 5.7 mercruiser engine?

The marine engine may rotate counter clock wise instead of clock wise.The marine engine is designed to work at high loads and higher RPM continuously that the 350. It will also be set up to burn more fuel under light load so it can run at high load for long periods.Many of the parts will probably...

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What is the difference of a 350 gm and 5.7 mercruiser engine?

the merc was normally built with a windage tray, some say balanced bottom end but ive never found one to be. different cam and intakes. some were also set to run reverse rotation depending on if it was a twin engine setup or not. many of the core blocks are cracked also from being froze. best to ...

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What is a MPI?

MPI stands for multiport injection.

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What is the compression ratio of a diesel engine?

The compression ratio of a Diesel ranges from 14:1 to as high as 25:1.I agree just depends on engine.

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What is the average compression ratio of a diesel engine?

Diesel engines are designed to operate at higher compression ratios, usually between 15 to 20, while petrol engines have lower compression ratios usually between 8 to 10.Since the higher the compression ratio of an engine the higher the thermal efficiency, so diesel engines generally have a bette...

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Auto Technician A says the total volume of all the cylinders in an engine is called the compression ratio?

The volume of an engine is called displacement and is typically measured in cubic inches or liters. An eight cylinder engine that could hold 1/2 liter of water (or air) in each cylinder would be a four liter engine. As the pistons move to the top of the cylinder in an exhaust stroke, they theoret...

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What is compression ratio of IC engine?

The compression ratio is the ratio of the volume of the cylinder and the combustion chamber when the piston is at the bottom, and the volume of the combustion chamber when the piston is at the top.Automotive engineers can improve fuel efficiency and fuel economy by designing engines with high com...

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What is the compression ratio of and engine?

Compression ratio is the difference in the volume of a engine cylinder between when the cylinder is at it's largest volume, compared against when the cylinder is at it's smallest volume. Gasoline engines use 8:1 to 12:1 compression ratio. Diesel fuel engines use 14:1 to 25:1.

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What is a remedy of the engine if it is loose of compression?

If engine is losing compression it is likely the rings are worn and need replacing. The valves are likely leaking too and need replacing.

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What is the air pressure inside the top of a normally aspirated engine cylinder with an 11.5 compression ratio when the piston therein is in the power stroke and at full compression.?

Assuming an atmospheric pressure of 14.7 psia and a specific heat ratio of the air at 1.3 then the required pressure is: P = Patmp X rck= i4.7psia X 11.5 1.3= 351.74psia

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What is the firing order of a six cylinder engine?

Firing Order of Different Multi Cylinder (2, 4, 6) Engines. S.noNumber of cylinderFiring Order1.21-22.31-2-3, 1-3-23.41-3-4-2 1-2-4-3 1-3-2-4 1-4-3-24.61-5-3-6-2-4 1-4-3-6-2-5 1-6-5-4-3-2 1-2-3-4-5-6 1-4-2-5-3-6 1-4-5-2-3-6 1-6-3-2-5-4 1-6-2-4-3-5 1-6-2-5-3-4 1-4-2-6-3-5 Jan 8, 2018

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What is the firing order of a 6 cylinder engine?

That would depend on what make, model, and year, 6 cylinder engine you are referring to. They are not all the same. But as you fail to list this very important information, you will not receive an answer. I will watch this question and answer when you provide the necessary information.It is a 192...

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What is the firing order of a 3 cylinder engine?

The firing order in Honda Accord ( 6-cylinders placed in V-shape such that cylinder 1,2,3 are placed in left hand side and 4,5,6,are placed in right) is configured as 1-5-3-6-2-4.Firing order 1-5-3-6-2-4 means the crank pins having piston mounted are arranged in every 60 degree of the crankshaft.

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What is the Temperature of a 4-cylinder car engine?

depends on the thermostat used usually between 180 to 195 f

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What is the firing order of a 4 cylinder engine?

The typical firing order of Inline four cylinder engine is 1-3-4-2.Firing order in a multi-cylinder engine is arranged so that the torsional moment is even and the load is uniformly distributed on longitudinal direction of the crankshaft.An even firing order will increase the balance of engine.

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Is the compression ratio of a piston inside its cylinder measured mechanically or atmospherically?

Mechanically To put it as simply as possible. The cubic inches of a cylinder and the amount of space your compressing it into is the compression ratio.

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What will cause no cylinder compression?

A cracked or broken piston will cause a loss of compression, as will cracked or broken rings. The failure of a head gasket will also cause a loss of compression, as will broken, cracked or badly worn valves or valve seats. A crack in the cylinder itself (either the sleeve or the engine block), or...

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How much horsepower is in a 7.4 Liter 454 Engine?

A stock 454 7.4L is around 330HP, but you can have one ramped up with performance parts to be as high as 750HP.

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What happens when you lose compression in a cylinder?

This results in compression loss.The exhaust valve fails most often because it is exposed to the hot exhaust gases, which reach up to 1,200 to 1,350 degrees.The heated valve breaks or warps, causing leaks in the cylinder and compression loss.Valves can also acquire carbon buildup.

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What is the typical compression ratio and combustion chamber pressure in a compression ignition engine?

Typical compression ratios between 18:1 and 23:1 are common, although in an effort to minimize oxides of N2 compressions as low as 16:1 are being employed generally resulting in a loss of 1-2 mpg resulting from the lower thermodynamic efficiency of the diesel cycle. Higher compression ratio yield...

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What is a good engine compression ratio?

Compression ratios are often between 14:1 and 23:1 for direct injection diesel engines, and between 18:1 and 23:1 for indirect injection diesel engines.Since diesel engines operate on the principle of compression ignition, a fuel which resists autoignition will cause late ignition, which can lead...

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What is considered a high compression engine?

Anything over 10:1 is a high compression ratio.Anything over 12:1 is "highly compressed".87 Octane is both a high and low compression fuel.

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Is the 460 a high compression engine?

Depends on what year the engine was made. Late 60's and early 70's produced around 10.5:1. Later years could be as low as about 8.8:1

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What is the compression on a 1995 wildcat 700 engine?

120 P.S.I. is acceptable low, 130 is good 135 is factory startup/breakin period required.

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Compression ratio of diesel engine?

Usually between 16:1 and 22:1

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A four cylinder engine has a capacity of 2 liters it has a compression ratio of 10 to 1 calculate the volume?

The volume of the combustion chamber?(2000 cc / 4) / 10 = 50 cc per chamber

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Why would the compression be low on 5 cylinders of a 350?

WILL IT STLL RUN ?OR IS IT DEAD ?

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What are the advantages of the six cylinder engine over the four cylinder engine?

6 cylinder engines can produce more horsepower and torque, are more willing to rev at lower RPM and deliver power more smoothly, particularly at higher RPM. They also power accessories such as air conditioning with greater ease.Consider a 6 cylinder car if you are likely to carry a car full of pe...

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Compression ratio of the internal combustion engine is defined as?

The compression ratio of an internal-combustion engine, or an IC engine as it is more commonly called, is the ratio of the volume the highest capacity of the combustion chamber to its lowest capacity.In the IC engine, the piston makes a stroke, resulting in the compression of the air in the combu...

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What is engine compression ratio?

The compression ratio is the ratio of the volume of the cylinder and the combustion chamber when the piston is at the bottom, and the volume of the combustion chamber when the piston is at the top.Automotive engineers can improve fuel efficiency and fuel economy by designing engines with high com...

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What is the compression of a 5 horse power craftsman lawn mower engine?

A 5hp craftsman engine has a compresson of 135psi

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What is the danger of high compression in a spark ignition engine?

If the pressure is too high for the grade of fuel, you will get 'pinking' or 'pinging'. This is the term for pre-ignition. The fuel will explode instead of burning rapidly, and makes a metallic rattling or 'pinking' sound.This can damage the valves and piston crown if left to continue.High compre...

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What may be the causes of no compression in the rear two cylinders?

bad rings most likely burnt valves i would also suspect a blown head gasket between those 2 cylinders

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What is the firing order of 8 cylinder engine?

Various firing orders for different engine layouts number of cylindersfiring order71-3-5-7-2-4-681-8-7-3-6-5-4-2 1-8-7-2-6-5-4-3 1-8-4-3-6-5-7-2 1-6-2-5-8-3-7-4 1-5-6-3-4-2-7-8 1-5-4-8-7-2-6-3 1-5-4-8-6-3-7-2 1-5-4-2-6-3-7-8 1-5-3-7-4-8-2-6 1-3-7-2-6-5-4-8 1-3-6-8-4-2-7-5 1-2-7-8-4-5-6-3 1-2-...

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What is the firing order of 6 cylinder engine?

The typical firing order used for Inline 6 cylinder engine is either 1-5-3-6-2-4 or 1-4-2-6-3-5.

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What is meant by the compression ratio of a combustion engine?

The compression ratio of a combustion engine is the relationship of the largest and smallest capacities of the combustion chamber. A higher compression ratio is advantageous because the engine operates more efficiently, extracting more mechanical energy from the fuel. Most gasoline-powered engine...

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What is the stock cylinder compression on a 1988 V6 2.9L ford ranger?

Highest and lowest cylinders should not exceed a 10% difference

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What is the rated cylinder compression on a polaris 400 2 stroke motor?

needs to be over 105 to run ideal is 120-130 stock higher if modified

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What is good engine compression?

But a good rule of thumb says that each cylinder in a mechanically sound engine should have compression of 130 psi or higher.

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What does it mean when a cylinder has no compression?

There could be a stuck, burnt or leaking valve.The camshaft has excessive wear and is not opening the valve(s).If the compression is low or zero on two adjacent cylinders, it would indicate a leaking gasket.There is a weak sealing surface at the head to block mounting area, which basically means ...

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What is the firing order of 4 cylinder engine?

Depends on the make, model, and year which you failed to list. It will be 1-3-4-2 or 1-2-4-3, or 1-3-2-4, or 1-4-3-2

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What is the natural frequency of four cylinder engines?

80-120hz for diesel engine

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What is the firing order of 12 cylinder engine?

A V12 engine is a V engine with 12 cylinders mounted on the crankcase in two banks of six cylinders each, usually but not always at a 60° angle to each other, with all 12 pistons driving a common crankshaft.

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What is the firing order of six cylinder engine?

Firing Order of Different Multi Cylinder (2, 4, 6) Engines. S.noNumber of cylinderFiring Order1.21-22.31-2-3, 1-3-23.41-3-4-2 1-2-4-3 1-3-2-4 1-4-3-24.61-5-3-6-2-4 1-4-3-6-2-5 1-6-5-4-3-2 1-2-3-4-5-6 1-4-2-5-3-6 1-4-5-2-3-6 1-6-3-2-5-4 1-6-2-4-3-5 1-6-2-5-3-4 1-4-2-6-3-5 Jan 8, 2018

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Is a high compression engine better?

Automotive engineers can improve fuel efficiency and fuel economy by designing engines with high compression ratios.The higher the ratio, the more compressed the air in the cylinder is.It's the same thing with compression ratios.By keeping the explosion in a smaller space, more of its power can b...

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What is the compression psi of a compression ratio of 16.2?

There is no direct connection between compression ratio and pressure. Ratio is a mathematical calculation of the cylinder volume from bottom center to top center. Actual cylinder pressure will depend on the volumetric efficiency of the engine. Factors the affect volumetric efficiency include rpm,...

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Where is the oil sending unit on a Chevy 3500 7.4 engine?

On top of engine, way in back, under the distributor.

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You did a compression test and have 195lbs what is the compression of the pistions?

There is no possible way to answer that question based on just PSI.Try googling compression ratio calculator. Once opening the first result you will need to enter your engine specifications to find out the answer. You will need to know the bore, stroke, gasket thickness, size of the combustion ch...

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What is a 7.4 L in 1990 Chevy van G30 engine size?

The chevy 7.4L v8 is 454 cubic inches.That's what's commonly referred to as a 454... it's a big block engine of 453.96 cubic inches.The 7.4 L engine equals 454 cubic inches.The engine size is 7.4 litres.

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If an engine has a compression ratio of 7.1?

Depends on the make of engine, but that sounds about normal .

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What is the minimum compression for an engine to run?

Healthy engines should have compression over 100 psi per cylinder, with no more than 10 percent variation between the highest and lowest readings.

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What is normal compression for a Ford 7.3L diesel engine?

It has a compression ratio of 17.5:1

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What is the firing order of the cylinders in a 5.4L 2000 Lincoln Navigator engine?

1-3-7-2-6-5-4-8 ---------------------------------------------------------------------------------------------just adding to the answerOn a 2000 Lincoln Navigator :It has the Coil On Plug ( C.O.P. ) ignition system with ( 8 ) individual coilsThe engine cylinder locations are numbered :firewall4 - ...

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What is compression ratio for petrol engine?

Different engines - different ratios, but commonly around 8 to1.

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What is the numbering sequence of the cylinders on a 302 ho ford engine?

The Ford 302 HO firing order is 1-3-7-2-6-5-4-8. This is different from the standard Ford 302 which is 1-5-4-2-6-3-7-8. Do not confuse them. Cylinder lacations are Passenger's side front to rear 1-2-3-4 Driver's side Front to Rear 5-6-7-8 The Ford 302 HO firing order is 1-3-7-2-6-5-4-8. This is ...

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What is the firing order for a four cylinder engine?

The typical firing order of Inline four cylinder engine is 1-3-4-2.Firing order in a multi-cylinder engine is arranged so that the torsional moment is even and the load is uniformly distributed on longitudinal direction of the crankshaft.An even firing order will increase the balance of engine.

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Why is the compression ratio of a spark ignition engine limited to about 9.51?

So the engine can run on regular 87 octane gasoline.

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What is the purpose of compression rings?

To prevent fuel, air and combustion gases from escaping.Short and simple.

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Why is there Loss of compression in car engines?

because somewhere you are "leaking compression" with bad piston rings, intake or exhaust valves or similar.

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Which engine is more efficient in terms of compression ratio?

For a conventional gasoline engine, the higher the compression ratio, the more efficient the engine. US passenger cars have not had very high compression ratios for about 30 years for multiple reasons. During 1970-1972, Chrysler had the highest compression ratios in US production cars, requiring ...

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What is the smallest engine on a 4 cylinder car?

A 610cc (0.6 liter) built by an obscure French car manufacturer in 1947

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Compression raito of 2 stroke petrol engine?

This can be anything, depending on the design of the motor.You'll need to be more specific with your question. For example, quote the make and model of the engine etc.

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What is the strongest 4 cylinder engine?

Mercedes-AMG has revealed its new turbocharged 2.0-liter inline-four, and it's the most powerful series-production four-cylinder in the world.It makes 416 horsepower and 369 lb-ft of torque in top trim, giving it a specific output of 208.9 horsepower per liter.

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How do you lower the compression ratio of an engine?

There are several means by which the compression ratio of an engine might be reduced although all involve extensive mechanical rework to accomplish.1) Remove the heads from the motors and grind the compression chambers of the head(s) to make the area larger.2) Install replacement pistons that hav...

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What is the deffintion of compression ratio?

Compression is squeezing something so that it occupies a smaller space. Ratio is the proportion between two quantities or numerical values. Click the link for a detailed explanation. Explanation below!++++Therefore a Compression Ratio is the ratio between original and compressed volumes of, norma...

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What is the compression pressure of a 400 sbc?

It could vary greatly depending on how the engine was built. What you want to see is all the cylinder readings be within 10% of each other.

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Is the master cylinder part of the 4 6 or 8 ect cylinders of your engine or is it different?

The Master Cylinder is part of your Braking system. It is usually located on the Firewall of your car and holds the brake fluid which allows you to stop by pushing fluid against the caliper on your brakes when you put your foot on the pedal. The cylinders of an engine are usually referred to as c...

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What is the easiest way to get horsepower out of a 4 cylinder engine?

Add a free flow exhaust and a cold air intake free flow air filter. This will give you slightly more h.p. To get some real horsepower you can install a turbo charger or supercharger but they are expensive.

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What is the firing order of a 6 cylinder diesel engine?

Firing Order of Different Multi Cylinder (2, 4, 6) Engines. S.noNumber of cylinderFiring Order1.21-22.31-2-3, 1-3-23.41-3-4-2 1-2-4-3 1-3-2-4 1-4-3-24.61-5-3-6-2-4 1-4-3-6-2-5 1-6-5-4-3-2 1-2-3-4-5-6 1-4-2-5-3-6 1-4-5-2-3-6 1-6-3-2-5-4 1-6-2-4-3-5 1-6-2-5-3-4 1-4-2-6-3-5 Jan 8, 2018

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What does it mean if one cylinder has low compression?

Low compression in one cylinder usually indicates a bad exhaust valve.Low compression in two adjacent cylinders typically means you have a bad head gasket.Low compression in all cylinders would tell you the rings and cylinders are worn and the engine needs to be overhauled.

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What is the bore of a cylinder?

In a piston engine, the bore (or cylinder bore) is the diameter of each cylinder.The stroke ratio, determined by dividing the bore by the stroke, traditionally indicated whether an engine was designed for power at high engine speeds (rpm) or torque at lower engine speeds.

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What causes lack of compression in an engine?

Lack of compression might occur for these reasons: Your piston rings are worn (allowing the air/fuel mix to leak past the piston during compression).The intake or exhaust valves are not sealing properly, again allowing a leak during compression.There is a hole in the cylinder.

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What is cylinder location of 2005 Toyota 2.7L engine?

The 2005 Toyota 2.7L 4 cylinders are numbered front to rear, 1, 2, 3, 4.

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Compression ration in diesel engine is?

Higher than a gasoline engine.

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What is the key difference between the piston action of an internal combustion engine and that of a compressed-air engine?

The internal combustion engine uses a fuel i.e petrol or diesel to cause compression when ignited ,when the fuel burns it causes compression of the piston. A compressed air engines power comes from an electric motor which forces the piston up and down to produce compressed air.

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What does cylinder do to an engine of a car?

The engine actually is a set of cylinders in which pistons move up and down in order to creat force which is transfered to the gearbox and then to the wheels

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A smoothly operating engine depends high compression?

It depends on equal compression between all cylinders.

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Is there a picture of the firing order for a 1995 Camry 4 cylinder engine?

There is a picture of the firing order of a 1995 Toyota Camry 4 cylinder engine in the vehicle's service manual. The firing order determines when each cylinder is ignited during the combustion cycle.

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What is the compression on a 454 big block Chevy engine?

Engine Block Design Chevy produced the 1978 454 blocks with both two- and four-bolt main caps.Displacement occurred via a 4-inch crankshaft stroke and a 4.25-inch-diameter cylinder bore.

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Where is cylinder 1 in a 4 cylinder engine?

Usually four-cylinder engines are inline, meaning in a straight line from left to right. The leftmost cylinder is Cylinder 1.

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What is the compression ratio on a 1.4 corsa petrol engine?

For the Opal Corsa generation Corsa B, 1.4 i petrol engine, the compression ratio is 9.4. It has 60 horsepower and a 46 liter fuel tank. For the 1.4 XER, the compression ratio is 10.5. For the 1.4 i 16V ECOTEC, the compression is 10.5.

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Is it good to drive a car where one cylinder has no compression?

NO. It may get you home, if you drive carefully and slowly, but you would need to get it checked out, may be fairly pricey

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Is a 3 cylinder engine better than 4 cylinder?

A 3 cylinder engine is much more fuel efficient compared to a 4 cylinder engine of the same size.This is because of two primary factors, reduced frictional losses and lighter weight.Since there is one cylinder less, the frictional losses caused by metal surfaces coming in contact within the engin...

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What happens if engine compression is too high?

Compression pressures that are too high can result in difficult starting and detonation or “pinging” which in turn can cause engine damage.If the static compression pressure is too high or too low, the engine will not run as well as it should, and in some cases the resulting problems can be serious.

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What is the engine oil capacity for a 2007 canyon truck 5 cylinder engine?

I found the capacity for my 2006 GMC canyon 3.5 five cylinder which is six quarts

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Why is compression in a car engine important?

Well the only way your car will work is if it has compression your silenders haft to have the compression to go back down and make power if you are working on a car you MUST chack your compression and make sheer that you enuf if you don't something is wrong ( head gasket or a crack block more the...

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Where is the number 4 cylinder on a Triton engine?

If you are facing the front of the engine 1 is the cylinder closes to you on the left then 2 behind that then 3 and after that it is 4, on the right side it goes 5,6,7,8.

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What is the cylinder diameter for Toyota 2E engine?

Cylinder diameter is the Bore.Bore is 73.0 mm (2.87401575 inches)Stroke is 77.4 mm (3.07424409 inches)

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What will be the effect of low compression on an engine?

Low Engine Compression will Cause a Misfire An engine with low compression in one cylinder will present itself by having a misfire and running rough while no compression in all cylinders will cause the engine not to start.There are many different low compression symptoms which will cause the eng...

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How does a Compression ignition engine work?

A compression ignition engine works with Pistons and Valve openings.There is an intake valve, with lets the fuel and air into the cylinder, and the exhaust valve which allows for the escape of the combustion.The engine starter, supposedly started by a battery, gives the piston an Initial movement...

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What is the tightening sequence for the cylinder head of a 1967 ford mustang six cylinder?

You start in the middle of the head and work your way out to each end in sequence left then right. You tighten them in 3 steps. Step 1 tighten to 50 ft/lbsStep 2 tighten to 60 ft/lbsStep 3 tighten to 75 ft/lbs.http://www.classicinlines.com/SmallSixSpecs.asp

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What makes an engine lose compression?

Worn cylinder bore, worn piston rings, poor valve seat condition, tired valve springs.

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What happens when your engine loses compression?

This results in compression loss.The exhaust valve fails most often because it is exposed to the hot exhaust gases, which reach up to 1,200 to 1,350 degrees.The heated valve breaks or warps, causing leaks in the cylinder and compression loss.Valves can also acquire carbon buildup.

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IN what type of engine is the intake valve held open longer than normal during the compression stroke?

I think its a stroked motor i could be wrong

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What is the most cylinders in an engine?

Currently, the production car with the most cylinders would be the Bugatti Veyron with a quad-turbo W-16 displacing 8 liters.Ironically, the largest car engine ever was an I-4, with 24 liters.

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Can low compression on an engine damage a engine?

Low compression indicates that engine damage already exists. An engine's compression will be lost if: there is damage or wear to the pistons or rings there is damage or wear to the valve train there is damage or loss of seal on the cylinder head There are some other factors as well, but these thr...

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Is a 4 cylinder engine powerful?

A four cylinder engine can be built to be EXTREMELY powerful, either my machining of the physical metal (head and block) to allow for more cylinder displacment and volumetric efficiency, or by use of "power adders" such as tubro or supercharger kits, nitrous oxide, and various intake systems. The...

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Is there a 7 cylinder engine?

Only one straight-seven engine for land propulsion is known to be in production, the AGCO Sisu 7-cylinder diesel engine.The straight-7 configuration is a lower investment because Sisu has reused cylinder heads from their I3 and I4 diesel lineups.

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What is the advantage of providing 4 valves per cylinder in an ic engine?

It increases the coverage of valves over the combustion chamber allowing faster breathing leading to better power at high RPM's. It allows the spark plug to be in the center of the chamber allowing a more complete burn.?æ

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When doing a compression test on a gas engine do you start the engine?

No, The compression test is done as the starter cranks the engine

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