I am currently looking at picking up an '05 LGT with 120K+ on it... I have seen the compression numbers on it 125-128 in 1-3 but cylinder #4 is near 80
... It currently is moded to stage Sure2Fail... Including FMIC, 18G turbo, TGV deletes and a nice list of other supporting mods. I am all schooled up on banjo filters and cated uppipes but have limited knowledge on engine internals... I am aware of the 2.5's ringland failure in cylinder #4 so that is what I suspect is the problem here... I am not able to do a leak down test to confirm until I buy it and have it shipped here...
I guess what I am wondering is...
A). would cylinder 4 have a ringland failure bad enough to score the block at 80 psi?
B). Is a burn valve a common problem on the 2.5's?
C). If I pull the block to rebuild it what would be the worst case?
D). average cost to do a rebuild that can handle around 450-500 WHP yet still be reliable?