Low compression on 2-3 plugs?

[semperfi510]

I did a compression and had low readings on 2-3 plugs on the passenger side heads. What could it be cracked rings, head gasket or any other ideas? I am doing a leak down soon just trying to get ideas. It is on my boosted Saleen. Thanks for the info.
JOhnny

 

[Joel's98GT]

numbers please.

 

[bdcardinal]

usually thats a head gasket, please post the numbers.

 

[semperfi510]

35 AND 65.
jOHNNY

 

[bdcardinal]

are those the numbers from the leak down or the compression test. if you are only getting 35psi on a compression test than there are SERIOUS problems with your motor.

 

[semperfi510]

are those the numbers from the leak down or the compression test. if you are only getting 35psi on a compression test than there are SERIOUS problems with your motor.

i think it was 35-45 from the compression test on either 2 or 3. I have had others say they had similar during a compression when the head gasket blew. I have no knocking on my engine though and it still runs ok except for the blow by?
Johnny

 

[Joel's98GT]

i think it was 35-45 from the compression test on either 2 or 3. I have had others say they had similar during a compression when the head gasket blew. I have no knocking on my engine though and it still runs ok except for the blow by?
Johnny

unfortunatly your not going to be 100% sure untill tear down, but I agree it sounds like a head gasket.

 

[semperfi510]

unfortunatly your not going to be 100% sure untill tear down, but I agree it sounds like a head gasket.

I hope so a leakdown might tell me more.
JOhnny

 

[bdcardinal]

ya that is usually a sign of a blown headgasket inbetween those cylinders. looks like youre ready for a rebuild.

 

[semperfi510]

ya that is usually a sign of a blown headgasket inbetween those cylinders. looks like youre ready for a rebuild.

Yup hopefully for know i can just change the gasket.
JOhnny