haddixjl
15+ Year Contributor
- 77
- 0
- Jul 27, 2006
-
orangevale,
California
I'll start from the beginning I got a 91 that I was told had low compression. So I checked the timing belt and it was off a tooth each cam. I pulled the head and got a different one rebuilt from a board member. Put the car back together and same deal low compression. The short block was rebuilt before I got it by sloboy racing with Manley pistons so I figured the previous owner bent the valves when he started it and the rings didn't seat in. I took the engine too the machine shop and he measured up everything re hones the cylinders and I put it back together with file fit right gs from Manley. Now I have put a few hundred miles on the car and just checked compression again and 1&3 are 150 and 2 is about 75 and 4 is 50 or so. So is there something else that can cause low compression to occur on the same cylinders? Maybe egr leak or intake or something as easy as that? I can't imagine that the rings just wouldn't seat again.
Cliff notes
Engine rebuilt head rebuilt and checked out again by diff machine shop all checked out good I re ringed the motor and still bad compression in same two holes
1=150
2=75
3=150
4=50
Thanks for any ideas on what to check
Cliff notes
Engine rebuilt head rebuilt and checked out again by diff machine shop all checked out good I re ringed the motor and still bad compression in same two holes
1=150
2=75
3=150
4=50
Thanks for any ideas on what to check