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Blown Head Gasket Symptoms!

I have a 88 NA supra, i'm trying to figure out if my thermostat is out or is my head gasket blown? What usually happens or what symptoms there are when your head gasket is blown?

Quote:

Originally Posted by Dejvid1785

...or is my head gasket blown? What usually happens or what symptoms there are when your head gasket is blown?

Read the second half of this post:
http://www.toyota-supra.info/forums/...00&postcount=6

Milky oil cap.
Milky dipstick.
Coolant loss.
Steam out of exhaust.

That's the stuff I saw yesterday after I drove my car for the 1st time in over a month, after replacing the head gasket. Yessssss. :D

Oh, and when you drain the oil, it should be nice and watered down too.

Quote:

I guess you had a water jacket to oil channel leak.
Not all BHG's are like this, I think most are the cylinder to water jacket leak type.

With my BHG, the oil was perfect. It came to a point where the combustion gasses would just cause the car to spit out coolant even in idle, yet the oil and coolant never mixed or had a leak amongst each other.

My cars tail pipe looks like it's a steam engine. lol, I'm replacing my MHG with a composite one tomorrow.

I don't have any smoke out of the exhaust or milky oil, but i am losing coolant!! Could that still be thermostat or something else? My temp gauge never stays still it sits up top showing that its over heating but the car isn't over heating and is driveable and suddenly it jumps back down, if anybody knows answer me. Thanx!

yea i did that too Bullz_EyE - crimped the head gasket putting it on. $100 and 3 days for a new one. ordered it friday, weekend was agony

I have the problem with the temp gauge, but luckily no problems. While im driving it shoots back and forth. Its either cold or overheating or where it should be. Most of the time it says its really hot. But its still good and driveable. So its just a malfunction with the temp gauge. Not much of a nuisance so i dont worry about it. My gas gauge is like this too. I dont pay attention to the needle but when that little orange light comes on, its definitely time to get gas. Goodluck and hope its not the BHG.

Can anybody tell me how to test that to see if it really is the HG, is there an easy way to test it out?

Quote:

Originally Posted by Dejvid1785

Can anybody tell me how to test that to see if it really is the HG, is there an easy way to test it out?

From
http://www.toyota-supra.info/forums/...27&postcount=3

Quote:

Originally Posted by TONY!

...In this leaking...do you see that your overflow is full after driving when it gets hot?
Do you lose coolant from that area? A very cheap way to see if you are losing coolant from that area is to put a container (soda bottle) after the overflow dump tube. If the overflow dump tube spits out coolant in the bottle...well, that would indicate that combustion gasses are forcing the coolant out of the system. That would mean you have a BHG in that case.
A cheap test. I learned that trick from Duane (upgradedsupra) so he gets merit for that idea....

Also, the guy that put that Cygnus site up, has some awesome write ups!
http://www.cygnusx1.net/supra/techtips.html

And within that, there is a good write up on BHG's.
http://www.cygnusx1.net/supra/techtip/bhgfaq.html