Blown head gasket and super high compression??

[myblack98gst]

Well I am almost 99% sure I blew a headgasket (cheap gasket + 20 psi = bad times). is gets hot the coolant blows out through the over flow and it chugs white smoke at anything over 1,500 rpms. But I did a compression test on it a little while ago.

#1- 165
#2- 210
#3- 165
#4- 165

1,3,4 are perfect but #2, well you see it, is Stupid high?? the plug was wet with what looked like a coolant/ oil mixture. the compression tester tip had a few spots of coolant on the tip. seems like if it was blown that bad it would not be higher but way lower??

Any help would be.. helpful

 

[myblack98gst]

additional --> this did not happen while beating on it. I drove normally for well more than a mile after getting on it with no problem. then I stop to back into a parking spot and it starts missing I rev it little and it looked like a steam engine??

 

[pneumo]

I bet that cylinder has quite a bit of coolant in it taking up space and causing the high compression. Get a strong flashlight, pull the sparkplug and look inside. See any water?

Coolant is also really good at steam cleaning the piston tops, so the good cylinders will have a black carbon coating. The blown cylinder will have a shiny clean piston in it.

 

[L2RTSiAWD]

Moved to Problem Diagnosis.