Compression check

[bobhenrie]

Hello from South Texas. Does anyone know what the PSI range is for compression checks? Just picked up a 85 4x4 MM in a trade and need to start evaluating what I have to work with. Any help appreciated.

[crvtec90]

looks like 140 psi

[bobhenrie]

Funny there isn't a plus or minus associated with that, most others have a 14 psi variance. Go figure. Thanks for the help.

[claych]

First,
Welcome Sir !!!!

Second,
May I ask for an bit more info? Specifically, Your Engine hot & cold compression readings?

[bobhenrie]

Thank you for the welcome. I don't have any compression readings yet, armature is bad on the starter. I can only get about one and one half turns on the engine before it spins out. More to follow as soon as thats fixed.

[crvtec90]

Compression is bound to be low on an old motor. The thing to look for is a big difference between cylinders.

Make sure your cooling system is adequate because overheating these engines usually leads to cracked heads.