OEM thermostat stuck closed after 4 months.

[240sxTuck]

Hey all, my car started overheating on the way home from work yesterday. Pulled over, popped the hood, no leaks at all. The lower hose was stone cold, which is a textbook symptom of a thermostat stuck closed.

The thing that pisses me off is that this is an OEM thermostat that i bought 4 months ago from my local dealership. I got it cause the cheapo O'Reilly stat (came on the car) also got stuck closed. Has anyone ever heard of a factory thermostat failing so fast?

Just for clarity, i have a stock KA24DE, 1992.

[Mikester]

Never had it happen personally, but it could be either luck of the draw, or a sign of a bigger issue in your cooling system. Might be worth doing a complete clean & flush this time around. And ensure you have the OEM-recommended coolant mixture.

Mike

[Kingtal0n]

Hmm when things like this happen to me...

Its never the part that I think it is.

[jedi03]

to big of a radiator can do it too...boil the thermostat in pot of water and can see if its thermostat or not, also have not seen this on a 240 but check your waterpump to make sure vanes spin when the pulley spins...if separated/loose theres the issue

[brndck]

pull the tstat, put it in boiling water and see if it opens.

also flush your radiator and look for any debris that could somehow clog the tstat

[jr_]

Hmm when things like this happen to me...

Its never the part that I think it is.

:werd:

How old are your hoses and radiator? Have you done a major flush of coolant lately? It will be interesting to see a photo of the thermostat after it comes out.