overheating under load

[AE86ID]

when ever my car 89 fxi gets put under load the temp gauge seems to rise its the worst in 5th gear i cant put my foot down wth out the temp rising any ideas i hav a new radatior core , hoses and all fluids maybe thermostat?
any ideas

[jondee86]

Yup... for what it costs, chuck in a new thermostat. If it is jammed
shut, or nearly shut, you will see the gauge climb as you put the
engine under load.

Cheers... jondee86

[matt dunn]

are you sure it is bleed properly,

I can get those symptoms on my car if there is air in the system,

other than that could also be water pump,
or air flow through the radiator.

[AE86ID]

is there anyone in welly that could help me do it ?

[Akane]

check water for oil contamination (and oil for water contamination) you might have a blown head gasket.

[MrOizo]

Might sound a bit over the top but check your wiring.

In my AW11, every now and then the wiring would ground due to a stray strand and make it look like it was over heating..

Maybe under load its shifting te engine enough and grounding out

[mr30%jr]

sounds to me like stuck thermo had a low ks 3sge do the same thing swapped a hole motor out just because of it

[AE86ID]

i have done copression check its not head gasket my money is on thermo or wiring i know my wiring is not perfect but what wire would it be ? but i doubt it would be wiring cause it does actually overheat so im guessing thermo

im in the welly region where is the best place to score one and how easy is the swap ?

[sergei]

Another possibility is radiator full of rust.

[Bling]

what sergei says.

can get a new thermo from anywhere like supercheap / repco etc and of course toyota i'm sure.

I doubt wiring can have anything to do with it at all, as its all mechanical stuff really, no wiring involved apart from to work your guage

[ollieboy]

im in the welly region where is the best place to score one and how easy is the swap ?

Get one from revhead they are way cheaper than at supercheap and repco. It's quite an easy swap, just follow the bottom radiator hose to where it meets the block, the thermostat housing is quite a unique shape so it stands out. There should be two bolts on there. Undo them and pop off the housing then pry out the thermostat with a screwdriver but be careful not to gouge out the aluminium on the housing. Then just put your new thermostat in, making sure the bleeder hole is at the highest point in the hole. Put everything back together and you are done.

Its sometimes easier to remove the airbox if you still have one and also there might be a plug on the thermostat for the fan, make sure you take that off so you don't damage the wiring and remember to put it back on after.