Sab

If I do a comression test on the '82 Euro S, what numbers would I expect to see? High and low?

danglerb

What you want is consistent numbers from as close to the same amount of cranking.

Pull all the plugs, fully charged battery still on a charger, pull fuel pump fuse or relay or something, don't count on me remembering exactly how or what you do.

76FJ55

Make sure you test it at wide open throttle or your numbers will be really low.

Sab

thanks, but what PSI numbers should I see?

danglerb

If you mean 210 good, 175 bad, I don't think it works that way, you just want all 8 close to the same. Post your results and many minds will sift through it.

GlenL

Don't worry about PSI numbers. Look for even numbers. PSI will vary by the method, the guage, battery health and cam timing. The engine will not fail evenly. Do all the cylinders in order and then re-test the first cylinder over again and any suspicious cylinders.

michael j wright

You wan't to see them within about 10% of each other. You will know that you have problems if one is lower than the rest or two side by side seem to not jive with what you see else where. If you are still unshure write down your nubers and post here-i'am shure at least one poster will jump in and descipher for you.

smudaaar

if your looking at strictly #'s as long as your over 100psi I wouldn't worry. If your low on a cylinder you could have a bad valve, ring...... 100 psi should be the min though

Sab

hmm got 135 -150 PSI, I thought it seemed low...

Dennis Wilson

A general rule for compression testing is the results should equal the compression ratio times 1 barometric pressure + or - 10%. If the engine has sat without running a long period of time, the reading will normally be low due to the lack of oil on the compression rings.

Dennis

danglerb

What were the numbers for all 8?

123quattro

On every street engine I've ever tested, they have all fell between 150 and 220. Most in the 170 range.