Guys,
Just ran a compression test on my 93 sc300 with 145k. I noticed the car had been making VERY small bubbles when revved with the radiator cap off. The bubbles would surface so i know that a headgasket is in check BUT, here are my results on a cold engine.

(1. being the cylinder closest to you when facing the motor)

1. 192
2. 188
3. 30
4. 36
5. 70
6. 50

OK so, that would explain loss of poser but seeing the engine was cold and 3 and 4 are so low, it almost seems the headgasket could be the issue right? Well, dont want to forget mentioning that i put some oil in 3 and 4 and sure as hell, psi jumped to 178 and around there. Looks like my rings are due. Quesiton is, can 2jz's be tested cold or is warm recommended. I know, many guys who swear that engines should only be tested warm. what do you guys think?

 

if ur compression was that low i dont ur car would be running. try redoing the test and crank it longer. sometimes it wont read right the first time it will have to biuld compression for a few cycle to read correctly