Compression / Leakdown Test Results

[itshimdazza]

Guys ,

Just had the above 2 tests performed on my car so i thought i would post up the results online to get some sort of feedback..

Compression Leakdown %

CYL1 135 PSI -- 15%

CYL2 145 PSI -- 11%

CYL3 135 PSI -- 27%

CYL4 135 PSI -- 24%

CYL5 140 PSI -- 16%

CYL6 140 PSI -- 13%

Cylinder 3 & 4 had higher % leakage indicating? valves etc

The reason for these tests are that i am blowing a bit of smoke under WOT (using oil) so I am trying to eliminate certian things. My Turbo is an SS1PU Hypergear so is less than 6 months old so maybe oils seals who knows.

Please provide any feedback you can...

Cheers Dazza

Edited April 13, 2012 by itshimdazza

[Bsa]

Engine seems a bit tired have you looked at valve stems

Edited April 13, 2012 by Bsa

[itshimdazza]

I would of thought that valve stems would blow more smoke at startup (Pease correct me if i am wrong though).

What are you looking at in cost to get the valve stems fixed?

Dazza

[Michael's R33]

Unless the stem seal are completely rooted they wont blow smoke all the time just on start up.

[Dobz]

How many k's has it done and what sort of mods?

It sounds like it's rings and/or bores which are the problem, oil wouldn't be burning under WOT if it was valve stem seals.

[hypergear]

Standard should be 165psi, mine was all around 130psi ish before it was forgied. I had 5 out 6 pistons with cracked ring lands. They are now around 160psi after rebuilding.

Check the turbo for shaft play. If there are no up and down play with about 1mm side to side then it should be fine. I'm happy to go over the turbo for you free of any costs. You can drive pass if you are in Melbourne.

[DVS JEZ]

Did they do a wet comp test aswell? This would have told u if it is rings etc

[itshimdazza]

Actually i am not sure if they did the wet test ...

maybe Manny from CHasers could shed some light on this?

Dazza.

Stao , Might take you up on the offer to check the turbo though.....