OEM thermostat stuck closed after 4 months. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

240sxTuck · 07-10-2019, 11:05 PM

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 · 07-11-2019, 04:50 AM

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 · 07-11-2019, 07:26 AM

Hmm when things like this happen to me...

Its never the part that I think it is.

jedi03 · 07-11-2019, 08:09 AM

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* · 07-11-2019, 08:33 AM

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_ · 07-21-2019, 04:58 AM

Quote:

Originally Posted by Kingtal0n

Hmm when things like this happen to me...

Its never the part that I think it is.

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.

07-10-2019, 11:05 PM	#1
240sxTuck Join Date: Sep 2016 Location: Sonoma County, CA Age: 29 Posts: 18 Trader Rating: (0) Feedback Score: 0 reviews	OEM thermostat stuck closed after 4 months. 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.

07-11-2019, 04:50 AM	#2
Mikester Nissanaholic! Join Date: Jun 2007 Location: Kathleen, GA Age: 52 Posts: 1,956 Trader Rating: (0) Feedback Score: 0 reviews	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 __________________

07-11-2019, 07:26 AM	#3
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 41 Posts: 4,828 Trader Rating: (17) Feedback Score: 17 reviews	Hmm when things like this happen to me... Its never the part that I think it is.

07-11-2019, 08:09 AM	#4
jedi03 Nissanaholic! Join Date: Jul 2008 Location: albuquerque Posts: 1,836 Trader Rating: (8) Feedback Score: 8 reviews	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