Booker Posted July 9, 2012 Share Posted July 9, 2012 Hello allI know there are a few threads on this but may as well ask! My car temp was running very low, to the point it would go down to the bottom. So today I got a garage to replace the thermostat, bleed the system and top up the coolants etc. upon driving the car back the temp rose to above 2/3rds so I whacked the blowers on and drove it back tothe garage. They said it was bled for 45 mins, so they concluded it could be the head gasket (pressure test req) or maybe the heater matrix. I'm taking their word that they have fully bled the system so am wondering in the other things they mentioned could be a possibility?Any help would be greatCheers Quote Link to comment Share on other sites More sharing options...
simpo Posted July 9, 2012 Share Posted July 9, 2012 Could be a faulty thermostat Don't think the heater matrix would cause the temp to go up would it? Quote Link to comment Share on other sites More sharing options...
Booker Posted July 9, 2012 Author Share Posted July 9, 2012 Not sure, but I've just ad a brand new thermostat put on it today. So hoping that's not the case Quote Link to comment Share on other sites More sharing options...
simpo Posted July 9, 2012 Share Posted July 9, 2012 That's what I am saying new one could be faulty. Take the oil cap off see if there is any white cream around it. Also whats the coolent level doing Quote Link to comment Share on other sites More sharing options...
knight Posted July 9, 2012 Share Posted July 9, 2012 + you might still have air locks in there! There a pain to bleed! Quote Link to comment Share on other sites More sharing options...
Booker Posted July 9, 2012 Author Share Posted July 9, 2012 I think it's an airlock issue, what's the best way to bleed it. The garage seem confident they've bled it completely. The needle goes up when sat idle, is this symptomatic? Quote Link to comment Share on other sites More sharing options...
joelufc20 Posted July 9, 2012 Share Posted July 9, 2012 you have to get it hot to bleed it, also these aint self bleeding engines. run engine for about 1 hour with the radiator cap off keeping and eye on the expansion tank so it dont run dry. Quote Link to comment Share on other sites More sharing options...
Booker Posted July 10, 2012 Author Share Posted July 10, 2012 Would I be correct in thinking the expansion tank is the coolant reservoir? Quote Link to comment Share on other sites More sharing options...
Guest Posted July 11, 2012 Share Posted July 11, 2012 Mine would take ages to warm up then get to hot. Thermostat didn't help but a new radiator cured it. Quote Link to comment Share on other sites More sharing options...
Krzys Posted July 13, 2012 Share Posted July 13, 2012 As above, when cold take the rad cap off and then just leave it ticking over and once she's warmed up, any bubbles comming out would mean there was an airlock! If after a while your not convinced then hold her at a few revs to generate more heat, but if there's no bubbles and she's starting to overheat then let her cool down, check for mayo on the dipstick and oil cap and back to the garage! Quote Link to comment Share on other sites More sharing options...
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