Hoping someone out there can shed some light on this issue.

I thought my head gasket on my truck had blown as Im getting a lot of air up through my expansion bottle, it looks like its boiling but its only warm to touch, so then lead me to believe its air or pressure.

A friend said this could be a one way valve within the water system that re-directs water to back to the expansion bottle if the water system gets too hot.

If anyone could advise on this issue or inform me where this valve is located, or possibilities to try to determine if its this 'said' valve or whether it is a blown head gasket I would be very appreciative.

A

Suprash, October 2009

sure its air bubbles?


it could be exhaust gases......if so its the head gasket

Richard, October 2009

hallo ive just done a headgasket on a 75e14 with exactly the same symptoms the gasket was knackerd

ash, October 2009

is the compressor on your vehicle for the air brakes water cooled? if so i would check the compressor out first if the head or gasket fails the compressed air can go into the coolant system giving the impression the engine cylinder head gasket has gone

jim, October 2009

could be compressor head gasket blown [think its water cooled] check by building up air and with engine off now check to see if air is still entering cooling system-if so i would suspect above.

k, October 2009