sookx1

just got my car back today from garage, after having head gasket done and rad replaced. done a 30mile round trip today and just as i got home the temp gauge started to rise. checked under the hood and the coolant overflow tank is full. no oil in it. it was half full when picked car up from garage this mornin. any1 have any clue as to the cause?

scooby546

iTrader: (1)

Might be airlocked? Does your heater work okay?

dj219957

check the header tank cap is working properly (i.e holding the correct pressure and sucking in the coolant when the engine cools down after switch off). Perhaps swap wirth a known good one. Try bleeding the system again. by running it with the cap off and topping it up. Thermostat could be stuck.

sookx1

just checked, heating working fine. if i do have an airlock in system how would i sort it?

bioforger

iTrader: (1)

er take it back to the garage who were suppose to fix it in the 1st place??

nardoblue

iTrader: (1)

Check that the temp sensor is working ok...could now be giving a false reading after the head gasket went

sookx1

have run the engine with header cap removed and topped up with coolant and it stayed full. then replaced header cap and ran engine again whilst checking overflow tank. over flow tank started to go down after stopped the engine. could it have been just an air blockage?

dj219957

yeh could have been a air lock. as above if it persists take it back!

Bob Rawle

Its not unusual to have this happen after coolant has been replaced as air locks are common. So it could have simply been that, if it now runs normally after your action then its certain it was. If not then as mentioned best to go back and have it investigated.

cheers

bob

sookx1

took car for a few runs, and coolant system seems to be working fine now. so as u guys said. looks like it was an air lock. thanx every1 for the feedback

scooby546

iTrader: (1)

Glad you got it sorted mate