cyl (1) 180 (2) 170 (3) 170 (4) 165

wet test cyl (1) 180 (2) 180 (3) 180 (4) 180

i'm thinking my block is good, but head studs need to be retorqued due to cyl 4 reading low? would appreciate peoples input! thanks

motor is stock, no aftermarket parts at all. did the compression test to start modding. but i think i have set backs....what do you all think?

 

My advice would be a leakdown to pinpoint where you're getting the compression loss... can you explain you wet test process? If it's just oil in the cylinder and the results evened out, I'd say that the oil on the cylinder wall improved compression and your rings are slightly worn for those cylinders. What makes you think gasses are leaking across the head surface (you mentioned tightening headstuds)?

 

Engine is fine, battery prob just got weaker as test went on

 

Nothing wrong with those readings, you have rings leaking on cyl four though, I don't know how tightening head studs would fix that though...

 

my reasoning for retorquing the head studs are because cyl 2,3 are on the same stroke and if the compression reading was low and the same it could be caused by the headgasket. in this case the reading is good and the same, cyl 1,4 are 15psi off. dont get me wrong i understand when doing a wet test and compression rises it could mean faulty rings. i put oil in the cylinders for my wet test.

stock motor has 75k miles, i'm glad i'm doing this now....will save me money down the road when i plan to build this thing.

 

I don't think you have anything to worry about. If there were headgasket issues, it would be more apparent than through a cranking compression test. Think of how high pressure ratio is during a firing event.

 

tested hot or cold ? throttle wide open ??

 

hot, and WOT

 

thanks i dont think i have a headgasket issue, i was leaning towards the head not being sealed evenly. thanks for everyones inputs, i would still like some more feedback before i pull the modding trigger

 

dont re-torque the head just mod it and drive it

 

was there a lil bit of sarcasm in there!! ROFL LOL

 

I would do the same. What's the mod plan look like?

 

i might redo the compression test, i cranked each cylinder for 5sec....i've been reading around here and people were cranking longer. or run the car longer to charge battery and redo cyl 4. i need to make sure this motor is good, i plan on going with a STM 6266 kit with all supporting mods

 

throttle wide open crank till you get a max reading but i wouldnt worry about it

 

dammit!! i knew i should of had a friend help me out, i'm going to redo this