? Replacing temp sending unit
Thread Starter
Racer
Joined: Apr 2006
Posts: 417
Likes: 0
From: Tacoma Washington
? Replacing temp sending unit
through searching I've come to the conclusion that maybe my coolant temp is not really what the factory gauge shows. I've got a new one, but it comes with no instructions. Obviously it only screws in one way, can't screw that up, but what should I use on the threads? Anything at all?
Also, the headers come pretty close. (3 inches) Could that raise the reading that is showing on the gauge? Has anyone experienced lower temps by maybe putting one of those spark plug boot heat shields on the wire/sending unit? Would that help? Just thought I'd ask before I try to figure out how to actually get a wrench in there to loosen the unit.
Also, the headers come pretty close. (3 inches) Could that raise the reading that is showing on the gauge? Has anyone experienced lower temps by maybe putting one of those spark plug boot heat shields on the wire/sending unit? Would that help? Just thought I'd ask before I try to figure out how to actually get a wrench in there to loosen the unit.
Burning Brakes
Joined: Mar 1999
Posts: 1,047
Likes: 3
From: CA
I never put anything on the threads...and you want it to get a good ground anyway. You probably know this but some coolant will leak out during the change. Use a protective cover on the wire if you think the header will burn thorugh the insulation...other wise it should have no effect on the guage reading.
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
Your correct, the temp gauge shows Head temp in the center and not necessarily coolant temp. The coolant temp will be somewhat lower than the gauge reads and will not fluxuate as much as the gauge.
Racer
Joined: Feb 2006
Posts: 299
Likes: 1
From: San Antonio TX
The last couple of times I have changed the temperature guage sending unit I have used teflon tape. Gives it a good seal and there is still a ground made. Just a wrap or two is all it takes so the threads cut through to ground but it prevents any leaks.
Melting Slicks
Joined: Nov 2001
Posts: 2,668
Likes: 43
From: Eastern US XX
Originally Posted by TexSon
The last couple of times I have changed the temperature guage sending unit I have used teflon tape. Gives it a good seal and there is still a ground made. Just a wrap or two is all it takes so the threads cut through to ground but it prevents any leaks.
Best is good old Plumbers Pipe Cement - you can buy it anywhere and it's inexpensive. I use "Rectorseal" myself because my brother gives me the almost used up cans from his plumbing trucks!
Instructor
Joined: Aug 2006
Posts: 187
Likes: 0
temp.guage.reading.
if it is a 79 or 80 .the sending unit is differant.looks the same plugs in the same.has differant ohms value. local suppliers will sell you the part but wont work. check volunteer corvettes.(www.volvette.com)
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Race Director
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From: Kansas City, MO ...I'd like to go fishing and catch a fishstick. That'd be convenient. - Mitch Hedberg
Originally Posted by clintwilson
if it is a 79 or 80 .the sending unit is differant.looks the same plugs in the same.has differant ohms value. local suppliers will sell you the part but wont work. check volunteer corvettes.(www.volvette.com)
