comprestion test
kalestefer
02-09-2008, 09:35 PM
HOw much psi should a 318 have in the cylinder
doctorheat
06-26-2008, 03:39 PM
Just check all 8 cylinders, if you got a bad one it'll be lower than all the others.
thats what we did for my friends 305 anyways, it worked, we had 6cyl's at 125 psi and 2 at about 90-95psi. its fairly evident which cyl will be good and bad when you write out all the numbers
thats what we did for my friends 305 anyways, it worked, we had 6cyl's at 125 psi and 2 at about 90-95psi. its fairly evident which cyl will be good and bad when you write out all the numbers
rhandwor
06-28-2008, 04:26 PM
If you find a bad one put some oil in the sparkplug hole and retest. If the pressure jumps it indicates bad rings. If it doesn't it indicates a leaking valve.
Compression depends a lot on wear but the previous post was in the ball park. I usually got around 135 to 150 on my own engines.
If you get one real low check for a cracked or broken valve spring.
Compression depends a lot on wear but the previous post was in the ball park. I usually got around 135 to 150 on my own engines.
If you get one real low check for a cracked or broken valve spring.
Automotive Network, Inc., Copyright ©2026