[map747]

I recently got a 83 Turbo motor with the P90A. I checked compression with a starter and battery I have. The compession was low. Do the hydralic lifters go down after sitting for a long time? How can I get the right reading. The comp. should not be below 120 like I read. Anyone help me here?

 

[EagerCrow]

I have the same compression in my car, 83 zxt with hydrolic lifters, I didn't try sprayin oil in the cylinders though. It's just a sign that our 19 year old cars need the engine rebuilt.


josh

 

[D83zxt]

142 normal, 100 minimum n/c

Z

 

[toms78zxt]

Was the engine up to operating temperature? You have to do the test on a warm engine to get correct readings. A cold engine will read low.

 

[zcarman]

Yes...those lifters will leak down.
Though just turning the motor over will probably get oil to the cam, the lifters won't pump up until the pressure gets a little higher. This is my experience with a P90A.
SB