what sealant on coolant temp sensor?
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Pro
Joined: Jan 2003
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From: Oswego Illinois
what sealant on coolant temp sensor?
Planning on replacing the Coolant temp sensor on dads 93 tomorrow, and just wanted to know if I should use sealant on the threads and if so should I use teflon tape or permatex high temp red sealant?
When the car reaches operating temp it idles bad, appears to have a miss, and stumbles and backfires when any amount of throttle is applied so Im assuming coolant temp sensor or ecm, as o2 and knock sensors have been replaced.
When the car reaches operating temp it idles bad, appears to have a miss, and stumbles and backfires when any amount of throttle is applied so Im assuming coolant temp sensor or ecm, as o2 and knock sensors have been replaced.
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Didn't I hear/read that a temp sensor comes with sealant on the threads -- and that it should not be augmented (at the risk of losing ground)?
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This happened to me with a Knock sensor.I put that tape on it,because I was worried about a coolant leak and it prevented it from grounding.
I took it off and put the sensor back in by itself and it worked,did not leak either.I also replaced the fan switch and others with no tape or rtv and they never leaked.
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If it does not come with sealant already applied then use the Permatex sealer.
I think if you use RTV it will disrupt the ground for the sensor.
I think if you use RTV it will disrupt the ground for the sensor.
Le Mans Master
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If you use RTV you could do only the last couple threads that way the first ones are grounding.
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I use teflon tape on all of them (my previous 86, my current 96 and even my son's 96) leaving the fore-most three threads uncovered.
The 86 FSM specifically calls for Teflon tape on the knock sensor.
Jake
The 86 FSM specifically calls for Teflon tape on the knock sensor.
Jake
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I've done the job three times (head and pump) with thread sealant and it works fine. A new sensor comes with it.
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Huh, I've read that you shouldn't put anything on the knock sensor as it can interfere with it detecting knocks. The AC Delco knock sensor I put on mine had some red sealant stuff already on the threads. So I didn't add anything, and I get no leaks. I also torqued it to spec, as I've read that is also a good idea with regards to the knock sensor.
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