Bubbling in the expansion tank?

[dalhousie2008]

bubbling in the expansion tank?

Car does not get hot, stay normal temp when driving has had a new rad fitted, thought it was all bled up ok.

I heard something about the tank caps being bad?

Any ideas.

[daza-b]

bubbling in the expansion tank?

Car does not get hot, stay normal temp when driving has had a new rad fitted, thought it was all bled up ok.

I heard something about the tank caps being bad?

Any ideas.

check for farting mice ;) lol maybe the start of HG failure?

[Harvey]

Get a sniff test done ,it looks for co2 in the cooling system takes 15 mins.

[dalhousie2008]

Yeah I know sniff tests check for hydrocarbons in cooling system, but id have to find someone to do it.

[ncarnall]

Thermostat, thats what mine turned out to be anyway. Everyone said HG to me too but turned out much much cheaper to fix.

[dalhousie2008]

I was of the opinion if it happens whilst engines not up to temp the prob heD gasket, if it's when warm thermostat or expansion cap seal

I.e when cold its the exhaust gases pressurising and when hot it's the heat expansion