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Usually at least 140-150 lbs.

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Q: What should be the compression in each cylinder of a good gm 350 engine?
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What is engine cylinder compression on 2001 pt cruiser 2.4 engine?

Should be at least 125 psi, with all 25 percent of each other.

What should the cylinder compression pressure be for 1991 Chevy s-10 2.5 liter engine?

It varies from one engine to the next but, what you want to see is that all the cylinders compression readings are within 10% of each other.

What should you do when find water in the engine oil of an outboard engine?

First thing would be to change the oil and filter. Perform a compression and cylinder leak down test on each cylinder, to determine how, and where, the water intrusion occured.

What should be the compression in each cylinder be for 2003 Chevy s10 4.3 l?

It will vary from one engine to the next. What you want to see is that all the cylinders are within 15% of each other.

What should the cylinder compression be on a 1997 Nissan sentra series 3 with a 1.6 liter engine?

What's more important is that all the cylinders should be within 10% of each other.

How much compression should a 1998 Ford Mustang gt have?

Each engine is different. It will vary depending on wear. What you want to see for a healthy engine is less than 10% difference between the lowest cylinder reading and the highest cylinder reading.

What is the compression on each cylinder on a 5.7 liter motor?

A new engine would have 150 LBS or more per cylinder. A used engine that runs real good and that has plenty of power should have at least 140 LBS. per cylinder. If there is more then a 15 LB. difference in any cylinder then you will have a rough idle and maybe an engine miss at a idle. That means there is an internal engine problem.

When does an engine need to be rebuilt?

The easiest answer is when it fails a compression test. Buy a compression tester (farily cheap), and test each cylinder. If one single cylinder is below 120 psi, or if one cylinder reads 15% less pressure than the cylinder with the highest pressure, your engine should be torn down and checked. The problem might only be in the heads, but it's still time for some serious work.

What is the Cylinder compression in a 2.5 liter engine?

The compression can be different from one engine to the next depending on mileage and maintenance. What is important is that all cylinders are within 10/15 lbs of each other.

How do you check the cylinder compression 5.7L Mer cruiser?

Remove the spark plug for each cylinder and screw a compression tester in it's place. Crank the engine around a few times and record the highest number achieved.

How do you know when your engine is going out?

First test of an engine is the compression test. If the compression is within 75% of the new engine spec, all cylinders should be within 20 psi of each other. Next test is the cylinder leakdown test. Putting pressure into each cylinder and checking the leakage past the rings and valves. General rule of thumb of any engine- if it starts up on the first 2 or 3 revolutions, does not emit blue smoke from the tailpipe and will pull the vehicle up a hill at normal speed, then it should be a good engine.

How do you tell if piston rings are bad?

The engine will be losing compression, and possibly burning oil. Check each cylinder to determine the compression. The loss could also be caused by a valve problem.