93 4AFE Overheating issue

[Jevticaleks]

Hi, Ive got a 93 corolla with a 4afe 1.6L engine and ive been getting overheating issues lately. The water-pump, thermostat, radiator cap and coolant temperature sensor and new headgasket has been installed but it still overheats, when i turn it on it idles very high and does not overheat at idle but when i go for a drive it stays under half line on the temperture gauge and then after a few minutes doing high speed it starts to creep up and overheat, and also when i am slowing down and have the clutch in the revs hunt up and down from 1000 rpm to 2000 rpm and then when im stopped it goes up to 2000 rpm (the radiator fan works aswell and the throttle body and iacv have been cleaned). Thanks, help would be much appreciated

[Tony Prodigy]

Can I ask who did all that work for you ?

It is possible the thermostat was installed backwards ??

Also sounds like you have a vacuum leak somewhere too. Does the serpentine belt slip ?

If everything checks out, it is possible you have a blockage somewhere, possibly within the radiator. Start with the thermostat.

[SRA]

The hunting seems like a bad or out of adjustment TPS, check it.

Does it consume coolant or oil excessively, does it blow smoke at the tailpipe?

How hot is the radiator outlet hose when it is overheating?

Edited March 25, 2021 by SRA