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Discussion Starter #1
Hey Everybody - I'm replacing my coolant temp sensor. What should I use on the threads? Something is telling me not to use tape. Thanks a million. JOhn
 

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Plumbers tape is the ticket.:bigthumbsup
 

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either teflon tape or pipe sealant, they will both work,
 

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Discussion Starter #4
10-4 thanks. I got the thread sealant Thanks guys. It works great. Thanks for the help! you guys are awesome.
 

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Your temp sensor needs to make an electrical connection with the intake manifold so it can have a ground path. Often, the tape will tear enough so you can get a good connection, but sometimes it won't. If your gauge stops working, it is because you have no connection between the sender and the manifold. Simply remove and reinstall, or sometimes if you just snug it up a little more, a connection will be established.
 

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Don't mean to hijack this thread, but are you guys refering to the ECT sensor? If so, could too much tape on the threads cause a code 51?
 

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Don't mean to hijack this thread, but are you guys refering to the ECT sensor? If so, could too much tape on the threads cause a code 51?
If code 51 refers to engine coolant temperature, the answer is yes. If you don't have a good electrical connection between the body of the sensor and the intake manifold, you'll get either no reading (most likely) or a bad reading.
 

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All the ECT sensors I have seen have plastic bodies... no grounding common to the intake.

You don't need to put any sealant on the threads. I never have, and I've never had a leak at the ECT.
 

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All the ECT sensors I have seen have plastic bodies... no grounding common to the intake.

You don't need to put any sealant on the threads. I never have, and I've never had a leak at the ECT.
You know, I am completely wrong. I am talking about the temp sender, not the ECT. Thanks for the catch. :)
 
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