Quote:
You're going to have to start double checking some things. Let the engine warm up to temp with the cap off. Look down into the radiator through the filler neck and verify that coolant is flowing at thermostat opening temp.
If in doubt, take the thermostat back out and drop it into a pan of boiling water; that way you can see for sure whether it's indeed opening.
Question: - when you said that the coolant is gushing out the overflow bottle, is it just gushing, or is it boiling inside the overflow bottle?
Question: - you have the system completely bled of air correct?
Ok, this is what we have done.
The little car got hot, not boiling hot, but hotter than normal.
So we checked the obvious things, hoses, coolant etc and found nothing amiss.
So, I checked and seen that there was no coolant circulating the way it should.
So, figured, stat, so we changed that.
Wife drove car a bit and all was good.
Daughter drove it that night and she said the temp gauge was higher than normal but never boiled over, not even smelled funny like one would hot.
Noticed the plastic tank on the rad had a place in the seam that was seeping, so we replaced rad.
Still ran higher than normal, so today I worked over the old stat where I could put it in(has to have one in it) and took the new one back out and I have water circulating.
Daughter drove car home and back over here and as I type she is out in it now and so far no high gauge reading.
1/2 way between cold and 1/2.
I'm thinking it might have a head gasket, head, or block issue.
I get no bubbles in the rad like you would when you have one leaking into the water jacket.