16331A - Thermostat

[Jay]

After several years of faithful service, thermostats can be prone to sticking. Always recommended to renew these as a preventive approach.

Remember to renew the gasket at the same time.

Part number : 90916-03046
Price : £16.02
Pic (right of pic) :

Also thought I'd add a guide to replacement in too for handiness. Hope it helps!


Thermostats can fail after many years of service in that they either stick open or closed for intermittent periods. It's a sensible move to replace a thermostat as part of regular servicing to prevent heating/cooling issues.

Here's a quick guide to replacing the thermostat on the 4EFTE engine:




There are two 10mm bolts holding the thermostat cover on:

Undo these bolts and unplug the temp sensor connection to allow the cover to be removed:

Once this is removed the thermostat will fall out and you will be left with this opening into the cooling system. If you see any signs of contamination it's recommended to clean it out (rust or sludge).

Here's what should be lying on the floor next to you (I had binned the old thermostat and seal before taking this pic):

The new seal and thermostat, ready for action:

Attach the seal to the thermostat around the edge like so:

Then the thermostat is placed in the cap and fitted in this position. I've been told to fit it with the little opening on it at the top. Not 100% sure why but someone with be along in due course to keep us right:

Then simply fasten the two bolts up being careful not to nip the thermostat seal in the process and reattach the temp switch.


Please add your thoughts on this one guys - have I covered everything? have I missed something important? Is anything wrong or misleading?

Jay

 

[GT_Irl]

Awesome write up Jay! I have a quick question....is there a part number for the plug that goes into the thermostat? How do I go about obtaining a new plug?

 

[Tanz]

Awesome write up Jay! I have a quick question....is there a part number for the plug that goes into the thermostat? How do I go about obtaining a new plug?

As far as im aware theres no part number for the plug as its part of the loom ,,, best bet would be to pick up a second hand one with a bit of wire still attached and splice it in....

 

[corofin12345]

just a heads up for this cause thats working out about 20euro for a thermostat.... when buying a thermostat for your 4EFTE, just get a corolla 4EFE thermostat.. the only difference is the price, they are the exact same.. i buy them down here for about 11.50euro which is about 9.30pounds weather its from toyota or the local motor factors

 

[Jay]

Awesome write up Jay! I have a quick question....is there a part number for the plug that goes into the thermostat? How do I go about obtaining a new plug?

I don't recall the plug being available separate from the whole loom unfortunately. There's plenty of breakers out there so secondhand should be an easy option though.

Just touching on what John has said, I'd actually stick to genuine Toyota thermostats when possible. I've had a few issues with the non genuine items, even had them faulty straight out of the box.

Jay