Tempature Sensor
Thread Starter
Intermediate
Joined: Nov 2005
Posts: 36
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From: Boonville Missouri
Tempature Sensor
I am getting ready to install a new tempature senson in my 350 sb. I've read that you should not use any teflon tape or RTV on the new sensor. Not sure what to do. Thank's for your advise.
Melting Slicks
Joined: May 1999
Posts: 2,897
Likes: 0
From: Moon Township PA
That advice is correct. you shouldn't need to use any teflon on the unit since it is a tapered thread. The other thing about teflon is that it may cause your sending unit to have a bad ground, giving you erroneous information.
Gary
Gary
Thread Starter
Intermediate
Joined: Nov 2005
Posts: 36
Likes: 0
From: Boonville Missouri
When I overhauled my motor I put a new sending unit in. My temp. seems to be running about 20 to 25 degrees high. That is compareing my guage to a infrared thermometer. Also I can watch my guage and when the 180 thermostat opens the gauge shows around 210. So I thought the best place to start would be with another sending unit. Also on the first one I used a sealent. Now not sure what to do.
Melting Slicks
Joined: May 1999
Posts: 2,897
Likes: 0
From: Moon Township PA
Originally Posted by roger's 2937
I just put a new sender in my '68 SB and it came from the vendor with teflon tape on it and it works fine and does not leak.
Roger
Roger
Gary
Pro
Joined: Sep 2002
Posts: 620
Likes: 2
From: San Antonio TX
I use the tape. You don't have to get crazy with it, just a couple wraps. You will still get a good ground and it's easy enough to check after you tighten it up. Just use your multimeter and check for resistance from the sensor to the block. It will read 0, or very close to it depending on the sensitivity of your multimeter.
I've never had a grounding problem due to teflon.
Heck, come to think of it, I don't even think we had teflon tape back then!
I've never had a grounding problem due to teflon.
Heck, come to think of it, I don't even think we had teflon tape back then!
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Joined: Dec 2004
Posts: 58
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Thread tape and pipe dope which are commonly known as thread sealants are really just a lubricant. The taper of the treads are what make the joint and keep it from leaking. When a lubricant is used and you take the joint apart there is very little if any of the lubricant left in the joint if it was tightened correctly.
