compression?

[freeman35]

i have a 95 k1500, its been smoking white, oil has coolant in it, i figured it was a headgasket or valve seal, but before i go tearing into it i want to know forsure, ive done a compression test on 1,3,5,7 cylinders results are
#1 dry 120 #1 wet 128
#3 dry 123 #3 wet 130
#5 dry 125 #5 wet 135
#7 dry 120 #7 wet 129
i didnt do the others because i ran outta daylight i plan on doing the other side tomorrow

engine has almost 300,000 miles i rebuilt the top end at 200,000

any input is appreciated?

 

[1997chevydriver]

If you have coolant in the oil it's either a bad head gasket, bad intake gasket, or cracked head.

 

[slippy3002]

If you have coolant in the oil it's either a bad head gasket, bad intake gasket, or cracked head.

x2 I wouldn't worry about compression testing.

Sent from Robland

 

[freeman35]

i got the intake manifold off and the gaskets looked almost new still, saturday im gonna take the heads off and have em inspected and machined.

 

[freeman35]

shouldnt the compression test show if i had a bad head gasket or cracked head?

 

[slippy3002]

shouldnt the compression test show if i had a bad head gasket or cracked head?

It just shows lack of compression. Which could mean a number of things. Bad piston, rings, gasket, head. You wouldnt know if it was a head or gasket until you pull it off. If the gasket is bad you will know it. The head needs to be magna fluxed. You already know there is water in the oil so you know its one or the other. I would always replace head gaskets in pairs on v block.

Sent from Robland

 

[freeman35]

Is the compression I got bad?