STI5300

iTrader: (4)

A friend of mine has one of these and is a bit concerned about the bubbling in the coolant when he gives the car a bit of sustained boost !!!. Are these cars particularly prone to problems of overheating, if so what is the likely couse of this. Could it be a blockage or a faulty thermostat.

Thanks in advance.

dadoc

bubbling coolant i presume you mean air bubbles in the coolant reservoir as opposed to boiling fluid,as far as i know air bubbles in the coolant reservoir is a blown head gasket there is a simple hydrocarbon test that can be done with the coolant

911

dadoc is dead right.
Been there and poven that.

One or both head gaskets, lovely job....

Graham

edge

What sort of test it that, and how do you do it?

911

I didn't bother with the test above as the fault was so obvious, but i think a good garage can put a probe into the header tank and detect the exhaust fume presence.

If you have bubbles after a hard full boost run, and even more so all the coolant has been discharged down the side of the car, and that the heater fails to blow hot, the gasket(s) have gone.
If you drive the car gently, the above will not happen, only happens when you boot it as the higher pressure blows via the flawed gasket into the water ways surrounding the faulty cylinder.

Quite a big job to do, engine out etc.
You can get it done quickly at www.apiengines.com or buy the right gaskets from David there too.

They did mine on my hill climb car running 1.5 bar and all is well after 2 years now. I gave them my loose engine with parts stripped off to ease the cost.

Graham

STI5300

iTrader: (4)

Thanks a million Guys I was starting to think a blocked waterway was the cause.