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Apr 04, 2016 5:34 pm
Apr 04, 2016 5:34 pm
Subject: Blown 4.5 head gasket and bubbles in the water.
After many faultless miles I suffered a sudden increase in water temperature which suggested a head gasket or worse. After cooling and refilling large bubbles were finding there way to the top of the radiator, in burps so to speak rather than continuous flow. I now have the head off and a nice little gap blown in the copper gasket between 3 & 4, effectively straddling the water channel. There is no immediate sign of cracking although this is a very preliminary diagnosis ( there was no water loss either other than in steam and expansion). Is it a possibility that the blow between the cylinders could locally super heat the water to create the bubbles? I might have driven no more than 20 miles with the damage. Regrettably this occurred on a test drive prior to a December wedding function which I carried out as the temperatures were cool and the bride needy! Other than at the initial failure, water temperature did not exceed 80 degs. Any advice most welcome before I fit a new gasket etc. and find the water issue still with me.
After many faultless miles I suffered a sudden increase in water temperature which suggested a head gasket or worse. After cooling and refilling large bubbles were finding there way to the top of the radiator, in burps so to speak rather than continuous flow. I now have the head off and a nice little gap blown in the copper gasket between 3 & 4, effectively straddling the water channel. There is no immediate sign of cracking although this is a very preliminary diagnosis ( there was no water loss either other than in steam and expansion). Is it a possibility that the blow between the cylinders could locally super heat the water to create the bubbles? I might have driven no more than 20 miles with the damage. Regrettably this occurred on a test drive prior to a December wedding function which I carried out as the temperatures were cool and the bride needy! Other than at the initial failure, water temperature did not exceed 80 degs. Any advice most welcome before I fit a new gasket etc. and find the water issue still with me.