leakdown clarification

[BlueHatch]

i know somebody on here can explain what leakdown is and what are the usual supects for causing it. i just got a comp test on my motor and i have excellent compression but 16% leakdown. can someone help me understand what this is? thx in advance :thinking:

[DirtyMechanic]

i know somebody on here can explain what leakdown is and what are the usual supects for causing it. i just got a comp test on my motor and i have excellent compression but 16% leakdown. can someone help me understand what this is? thx in advance :thinking: leak down usually refers tothe valve seal. when you do a compression test your usually testing the piston rings and their seal against the cylinder wall... but then again a leakdown can also show a leak around the rings if the valves are good. but all in all leakdown tests topend. compression test is for rings.

[Batlground]

Sounds like bad valve seals or guides.

If they leak oil, your compression will be good(oil in cylinder). but leakdown will be bad.

[BlueHatch]

so do you think the best fix would be a valve job?

[1flysi]

Did you hear air coming from anywhere? Like out the intake,exaust,the ajoining cylinder,dipstick or radiator?

[BlueHatch]

not that i can recall

[AnclyT]

take it to vuong's garage


# is in my sig

[BlueHatch]

take it to vuong's garage


# is in my sig
its already in the shop right now i just didnt ask what it was when he told me thx tho