Head Gasket and Compression Questions

[e30crazie]

I know this topic has been touched up before in this site but I'm looking for a quick answer as I am at work and need the data before I take my engine apart.

Scenario;

My son borrowed my car and overheated it. The first day I put water into the radiator (while it was hot) and my water started to boil over out of the reservoir. I assumed my HG has been blown so I didnt move my car again for 2 weeks now. Yesterday I did the same thing, added water and started the car and left it on idle for a while with no overheating.
I also checked my compression on all cylinders and to my surprise all has from 160 - 170 LBS of compression.

Question;

If my HG was blown would the compression be low? Is the possibility of my HG to have blown slim because of the compression? Or if the compression doesn't say much of the HG being blown and the possibility of it needing to be replaced is still there.

Thanks for the feedback.

[TobyB]

Drive it for a bit. Check the water for oil. Check the oil for water. Check both for level.

If nothing is wrong, you got lucky. The M20 is more durable than I think it is.

t

[e30crazie]

Drive it for a bit. Check the water for oil. Check the oil for water. Check both for level.

If nothing is wrong, you got lucky. The M20 is more durable than I think it is.

t

I will do that tomorrow... I hope that luck is on my side.

And yes I have labeled the M20 bulletproof and I hope it proves me right.