Replace Thermostat?

radensb · 02-05-2021, 08:45 PM

I am planning on changing my coolant soon and wanted to know if I should also replace my thermostat. I have an '09 with 64K miles. The car has never overheated and nothing has indicated that the thermostat is compromised. I had an oil change done at the dealer and they commented that the thermostat seal needed to be changed. RockAuto has the seal and an AISIN thermostat with housing for under $25 and since I will be replacing the coolant (and upper and lower radiator hoses), I figured I would just replace the thermostat and housing with a new one while replacing that seal.

Is this just a waste of money, or is there some logic to replacing this cheap part while it's easily accessible?

Spooler · 02-05-2021, 09:01 PM

No, you should leave it alone. If a thermostat breaks, it will be stuck partially open. In the winter time the car won't get warm. If you had 150k on it, then yes. At your mileage, no.

SouthArk370Z · 02-05-2021, 09:40 PM

Thermostats are pretty reliable nowadays and, as per Spooler, they usually break in a safe way. If it ain't broke, don't fix it.

radensb · 02-06-2021, 02:13 PM

Quote:

Originally Posted by Spooler

No, you should leave it alone. If a thermostat breaks, it will be stuck partially open. In the winter time the car won't get warm. If you had 150k on it, then yes. At your mileage, no.

Thanks for the info! Saved me $21!

I got a post about the coolant swap with some questions andy plan for doing it. I would appreciate your thoughts on this. Thanks!

60K Mile Coolant Change

Spooler · 02-06-2021, 04:34 PM

For as old as your car is I would tell you to do it. Even if it has the extended drain Nissan blue coolant. Just do a drain and fill. You will need to burp the system afterwards just in case you get air trapped somewhere.

02-05-2021, 08:45 PM	#1 (permalink)
radensb Base Member Join Date: Jan 2014 Location: California Posts: 148 Drives: 09 Nissan 370Z GM M6 Rep Power: 6721	Replace Thermostat? I am planning on changing my coolant soon and wanted to know if I should also replace my thermostat. I have an '09 with 64K miles. The car has never overheated and nothing has indicated that the thermostat is compromised. I had an oil change done at the dealer and they commented that the thermostat seal needed to be changed. RockAuto has the seal and an AISIN thermostat with housing for under $25 and since I will be replacing the coolant (and upper and lower radiator hoses), I figured I would just replace the thermostat and housing with a new one while replacing that seal. Is this just a waste of money, or is there some logic to replacing this cheap part while it's easily accessible?

02-05-2021, 09:01 PM	#2 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,850 Drives: 2013 Nismo 370z Rep Power: 2684392	No, you should leave it alone. If a thermostat breaks, it will be stuck partially open. In the winter time the car won't get warm. If you had 150k on it, then yes. At your mileage, no. SouthArk370Z, radensb, old guy and 1 others like this.

02-05-2021, 09:40 PM	#3 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Thermostats are pretty reliable nowadays and, as per Spooler, they usually break in a safe way. If it ain't broke, don't fix it. radensb, old guy and -ZS-Carpenter like this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

02-06-2021, 04:34 PM	#5 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,850 Drives: 2013 Nismo 370z Rep Power: 2684392	For as old as your car is I would tell you to do it. Even if it has the extended drain Nissan blue coolant. Just do a drain and fill. You will need to burp the system afterwards just in case you get air trapped somewhere. -ZS-Carpenter likes this.

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