temp sensor

Ken B · Jul 25, 2024

before i look at replacing this temp sensor, am I correct to assume the sensor is only the smaller diameter brass that is in the block? the outer brass is a bushing?
thanks in advance

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SquareRoot · Jul 25, 2024

Yup. You correct.

fast 99 · Jul 25, 2024

To me that appears to be a broken off mechanical sensor bulb. I believe the original sensor will fit the larger diameter hole.

Ken B · Jul 25, 2024

I thought it was nailhead sensor that the head got broken off.

fast 99 · Jul 25, 2024

Ken B said:
I thought it was nailhead sensor that the head got broken off.

Easy way to find out, remove it see what ya dealing with.

75gmck25 · Jul 26, 2024

The hole in the block of that ‘81 engine should be 1/2”, and sensors come in 3/8” and 1/2” threads. Looks like an adapter bushing was used to make a 3/8” sensor work. Many aftermarket mechanical gauge kits include the adapter bushing.

Ken B · Jul 26, 2024

thanks for the info. this not my original engine its a late 80s-90 engine. bushed to fit i did see that. guessing the bushing may try and come out when i try to remove sensor we will see. i think the sensor is a 13/16 socket to remove from the research I looked at. shoulda done this when the fender was off. Hindsight sucks.

Ricko1966 · Jul 26, 2024

It is a capillary tube sensor just like @fast 99 said,it's bushed to fit the original hole. Buy an O.E. sensor to match your gauge, done.

temp sensor

Ken B

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fast 99

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