So recently I did a compression test on my MY00 with 69k miles when I did the compression test I got 60psi from the 4th cylinder. I thought it would be my cylinder head or a scored cylinder so I took the head off and the head looks like its in good condition and the cylinders are very smooth. Do you guys know what else it would be? bottom end? broken piston ring? Head gasket?.


Thanks.

 

you need to get the head checked out by a shop that specializes in cylinder heads...

did you do a leakdown before you pulled the head?

 

ever over-rev'd???

little crack in the valve could do this easily. Check it out better or ask a machine chop, naked eye may not see it. You really need a leakdown test as stated already to determine more.

-Greg