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Overheating Mystery #449864 Feb 13, 9:34am Feb 13, 9:34am
Joined: Feb 2014
Posts: 2
Chester, UK
T
thecorb OP
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thecorb OP
T
New Member

Joined: Feb 2014
Posts: 2
Chester, UK
Overheating Mystery
So, to cut a long story short, I have a 52 plate Celica T-Sport that is overheating.
There has recently been installed a new water pump, radiator and thermostat.
There is no hot air coming from the heater and the temp gauge will go all the way up to hot, indicating that the thermostat isn't opening as it should.
Tried running without a thermostat for about 500 miles and it runs fine, although taking longer to heat up and only warm air from the vents not hot, which is understandable.
Put a new thermostat back in and the overheating starts again, as if there is something stopping the thermostat opening; forcing it shut.
Has been tested for head gasket problems and came through with no signs.
Other than some air still being in the system causing the thermostat to malfunction, does anyone have any idea what might be causing this?

Re: Overheating Mystery [Re: thecorb] #449882 Feb 26, 12:07pm Feb 26, 12:07pm
Joined: Feb 2014
Posts: 4
ks
2001 White Toyota Celica GT
ksgts
New Member
2001 Toyota Celica GT
ksgts
2001 White Toyota Celica GT
New Member
2001 Toyota Celica GT

Joined: Feb 2014
Posts: 4
ks
They can be a bit of a bitch to bleed. I had to hang the reservoir from the Hood latch with the bleed screw open to get mine to bleed. The exact instructions are in the manual. You will know you have it when the heater is working. Also as it gets hot squeeze the radiator hoses back and forth to tries and push coolant on to the thermostat to get it to open. Wear gloves and always be careful when working around a hot radiator.

Re: Overheating Mystery [Re: thecorb] #449933 Apr 9, 11:12am Apr 9, 11:12am
Joined: Apr 2014
Posts: 3
Michigan
2001 Blue Toyota Celica GTS
1989
New Member
2001 Toyota Celica GTS
1989
2001 Blue Toyota Celica GTS
New Member
2001 Toyota Celica GTS

Joined: Apr 2014
Posts: 3
Michigan
My toyota seems to have this same exact problem! What did you find out?

Re: Overheating Mystery [Re: thecorb] #449937 Apr 13, 1:24am Apr 13, 1:24am
Joined: Feb 2014
Posts: 2
Chester, UK
T
thecorb OP
New Member
thecorb OP
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New Member

Joined: Feb 2014
Posts: 2
Chester, UK
Well I had the thermostat replaced with an official Toyota one and the system bled once again, and since then I haven't had any problems. The heaters still aren't working 100%, they're hotter sometimes and colder others, and they never all seem to be outputting the same temperature... I think this may be due to some air still in the system, but the engine temp hasn't gone above the third bar once in about 1000 miles since the new thermo was fitted

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