[gmracing355]

I have a question on which way is better to check the condition of a engine by doing a leakdown test or go by compression testing. I did all cylinder and got between 195 and 210 cold cranking psi with a compression guage and i will check hot after taking it for a road test. the engine has been togeather for about 5 years and is starting to slow down abit. I still have to check out some other thing but wanted the opion of everyone on compression vs leak down gauge. Thanks
Greg

 

[A-Jay]

Leak down. Compression test will find a weak cylinder. The leak down will tell you how bad they are and can identify if it is intake valve exhaust valve or rings.

A-Jay

 

[JeffMcKC]

Its better to leak it down. you could have 190/210 comp with 20 % cylinder leakage, which would be very high.

 

[gmracing355]

Can you reccomend a good leakdown gauge to buy and any tips if possible.I will see if my local snap-on guy has on. It will be my first time using one. Thanks
Greg