Engine temp getting down between 140-150F on highway. Why??
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 935
Likes: 2
From: Beverly, NJ
Thanks for all the replies guys. I believe I put a fail-safe open stat in a few years back. When I get a few minutes, I will have to change it out with a new one. Thanks for your help. As always, I appretiate it. Thanks!
Racer
Joined: Nov 2005
Posts: 456
Likes: 3
From: Sumner Texas
Originally Posted by CFI-EFI
If it isn't at least partially open when you remove it from the engine, TEST it before you throw money at it.
RACE ON!!!
RACE ON!!!
I think that CFI and myself share the same frustration in seeing so many parts replaced as shotgun troubleshooting, rather than testing or inspecting them first.Have a great day,
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Although I have to admit many parts, the Opti in particular, has been replaced without proper troubleshooting, this case is different.
We're talking about the potential for a thermostat being stuck open. The test there would be to remove it and see if it's open. If it's closed when you take it out, what is there to test? Obviously it's not stuck closed because the car isn't overheating.
We're talking about the potential for a thermostat being stuck open. The test there would be to remove it and see if it's open. If it's closed when you take it out, what is there to test? Obviously it's not stuck closed because the car isn't overheating.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
You stick it in a pot of water on your stove with a thermometer in it, and observe the temp at which it opens. Nine times out of ten, if it isn't partially open upon removal, it's OK. In this case the stat IS bad, and it WILL be, at least, partially open. The test really wouldn't be necessary, but some people may be hesitant to reinstall it without some reassurance.
RACE ON!!!
RACE ON!!!
Drifting
Joined: Jan 2002
Posts: 1,261
Likes: 4
From: Middle River MD
Originally Posted by CFI-EFI
You stick it in a pot of water on your stove with a thermometer in it, and observe the temp at which it opens. Nine times out of ten, if it isn't partially open upon removal, it's OK. In this case the stat IS bad, and it WILL be, at least, partially open. The test really wouldn't be necessary, but some people may be hesitant to reinstall it without some reassurance.
RACE ON!!!
RACE ON!!!
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Originally Posted by CFI-EFI
You stick it in a pot of water on your stove with a thermometer in it, and observe the temp at which it opens. Nine times out of ten, if it isn't partially open upon removal, it's OK. In this case the stat IS bad, and it WILL be, at least, partially open. The test really wouldn't be necessary, but some people may be hesitant to reinstall it without some reassurance.
RACE ON!!!
RACE ON!!!
Pro
Joined: Nov 2004
Posts: 641
Likes: 3
From: Long Island NY
Originally Posted by HeeHaw89
Also if you are still unsure of your temp gauge accuracy, compare it to your oil temp reading. They are usually fairly close, with the oil running a little hotter.
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