ST184 overheating while driving not when idle

[AussieBandit]

Hi all,

My ST184 5S-FE 1992 is overheating while driving but not while idle or for short trips, also the hot air isn't working.

I have a leak somewhere as I'm constantly losing coolant while under pressure.

Any suggestions would be greatly received.

[trentmeyer23]

Is the leak visible?

[AussieBandit]

No visible leak, fair bit of coolant coming out of the overflow though.

[AussieBandit]

I'm going to change the thermostat in the morning, the car had been sitting untouched for nearly a year so I'm thinking there might be gunk in it

[trentmeyer23]

I would probably change the radiator cap as well.

[MisterF]

Before you go to great lenghts replacing everything, get a pressure tester and then pressurise the system and that will definatly reveal the source of the leak. :D

[Hiro]

Could be headgasket too, coolant loss combined with lots coming out of the overflow would indicate a BHG.

[AussieBandit]

I've had that thought in the back of my mind for a few days now hiro, I'm just hoping its not the case.

I've replaced the radiator cap as the rubber had started to disintegrate and tested the thermo ( working and opens at 80c)

I'll have to get her down to my local mech to get it pressurised as I don't have the equipment.

[trentmeyer23]

Has it stopped overheating and leaking?

[AussieBandit]

I'm not wanting to jinx it but with the new radiator cap She hasn't overheated or leaked.

$15 to fix , its not like a celica to be cheap to fix lol

[trentmeyer23]

Quiet often it can be a small cheap fix.

[sw20_3sgte]

Curious to see if the problem ended up being solved with the radiator cap after all?

[AussieBandit]

Sadly no, it started at the cap but the head ended up cracking, so she's been sitting in my garage for the last two months until I decide if I want to keep her and do a engine swap.