Question about 2002 Pontiac Grand Am

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The car runs but not very good before doing head gaskets ran very well and the other bank has 180 psi compression?

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  • Pontiac Master
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HEAD GASKETS ON CHEVYS ARE TRICKY YOU NEED TO TORCH TWICE SO TIGHEN TO TORCH LOSSEN RETORCH BUT THE INTAKE MANIFOLD IS TRICKER IT NEEDS TO ALL BE DONE IN STAGES AND THE CORRECT SEQUENCE START IN THE MIDDLE AND MOVE YOUR WAY OUT NEVER OVER TIGHTING ANYTHING TO MUCH TO FAST ALSO YOU NEED THE CORRECT SEALERS AND ALL SURFACES NEED TO BE REAL CLEAN GET A MANUAL AND READ IT AND JUST REDO IT GET GOOD GASKETS

Posted on Oct 15, 2010

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Compression psi hyunda elantra


about 120 so this engine is well past its best or the head gasket has failed between the compression rings on the gasket

Jan 29, 2014 | Cars & Trucks

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What is the Compression supposed to be for a 1987 Toyota Pick up 22R with carb, 4 cyl.???


A new engine would be about 180 psi for each cylinder. As the miles add up and wear occurs, compression will get lower. The important thing is that compression is even and balanced-lowest compression reading should be within 75% of the highest cylinder's compression. Some Toyota engines had a minimum allowable compression of about 135 psi, but if compression is balanced, you could have average compression as low as 125 psi and engine would still run good, some loss of power but still acceptable, and oil consumption would not be that bad.
If cylinder compression is below 120 psi as an average, you should be looking into a rebuild event-rings and valves need attention. If any cylinder is below 100 psi, it may not even fire, certainly will produce no power, and could be a head gasket failure, very worn rings, or valve problems.
Remember the important thing is to find compression readings that are very close to each other. I have an '87 Sentra with 75,000 miles(true!)-lowest comp. is 160, highest is 165 psi-runs great, good power. Also a '79 Datsun pickup (with god only knows how many miles-about 200,000 maybe). Compression is about 125-135 psi, fairly well balanced-noticeable loss of power, very little oil burning, still runs fair to good-dependable, at least.
That should give you an idea of what to look for. Good luck.

Aug 29, 2013 | 1987 Toyota Pickup

1 Answer

Code po301 cylinder no 1 has 80 psi all the other have 180 psi


How could you be lost

You explained it perfectly

The shop did all the correct diagnoses,
seldom see that at all,they did great job
of finding the issue

Dec 11, 2012 | Saturn Cars & Trucks

2 Answers

Bad compression on cylinder #2 2010 dodge charger


The lowest cylinder should be about 165 PSI, you have big problems here or faulty test equipment.

Oct 01, 2012 | 2010 Dodge Charger

1 Answer

What should the compression level be for a 1998 toyota camry?


compression should be about 150-180 psi with maximum deviation of about 20 psi between all cylinders. A compression test is not a very reliable way to test for headgasket leaks. It should be tested for headgasket leaks by using a chemical test caled a block test or checked with a device that can check for hydrocarbons in the coolant.

Apr 22, 2012 | 1998 Toyota Camry

1 Answer

What should a 98 dodge 5.2 compression be. Its in a 1500 Ram if that makes a difference.


GOOD COMPRESSION SHOULD BE 120 - 175 PSI IF COMPRESSION 100 PSI ACCEPTABLE. 90 PSI LOWER CYLINDER WEAK IF COMPRESSION 50 - 20 BLOWN HEAD GASKET.

Jul 05, 2011 | 1999 Dodge Ram

2 Answers

Cylinder 1 is at 125 psi and 2,3,4 and 5 is about 180 psi.. what could be causing this problem?


bad rings you can add a teaspoon of oil the the cylinder in question and redo the compression test if the compression goes up then the rings are bad if the compression stays the same i would be looking at a burned or bent valve or bad head gasket.

Dec 16, 2010 | Acura TL Cars & Trucks

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90 honda accord with excessive oil smoke. All cylinders have 180 psi compression,valve seals have been replaced. please help


It could be a oil control ring on piston or oil control valve on head or valve guides to worn or improper valve seal replacement or head gasket cracked head etc

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1 Answer

My 93 excel seems to be leaking pressure between cld 1&2 there is almost no pressure in these 2 wheras 3&4 has 175 psi in each which seems high. no external leaks, no water loss. only had car for...


The 175psi is not high for cylinder compression (I believe I interpreted it correctly). Two adjacent cylinders with low compression almost always means the head gasket has blown the fire ring between the cylinders. Pull the head, have it checked and or milled. New head gasket set, timing belt, oil change and get her going.

Sep 01, 2009 | Hyundai Motor 1993 Excel

1 Answer

This car is unsolve able ???????


Hi, This Might have nothing to do with your problem, but you have nothing to loose by the sounds of it, the breather pipe from the bottom of the sump (behind the starter motor) to the top of the rocker box, mine was clogged up with slug like greese causing sencer problems and giving false information to the computer. (running rought) you got nothink to loose, try it.

Chris

Aug 19, 2008 | 2000 Daewoo Lanos

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