guage temp sensor
Thread Starter
Heel & Toe
Joined: Jul 2020
Posts: 24
Likes: 1
From: niagara falls new york
guage temp sensor
hello- bought a 1990 c4 in june from the 81 yr. old original owner w/ 39500 miles.
runs just fine but temp guage only goes to about 110*. i cleaned the 'button type' connecter but no change.
the sensor has been in the aluminum head for 30 years and am wondering i if i remove it the threads in the head will get destroyed due to the bi-metal corrosion effect ?
i did get a new 'button head' sensor from jegs.
i do have temp gun and shows it;s running 185 -190 at the thermostat housing.
runs just fine but temp guage only goes to about 110*. i cleaned the 'button type' connecter but no change.
the sensor has been in the aluminum head for 30 years and am wondering i if i remove it the threads in the head will get destroyed due to the bi-metal corrosion effect ?
i did get a new 'button head' sensor from jegs.
i do have temp gun and shows it;s running 185 -190 at the thermostat housing.
Team Owner
Joined: Sep 2003
Posts: 25,373
Likes: 2,734
hello- bought a 1990 c4 in june from the 81 yr. old original owner w/ 39500 miles.
runs just fine but temp guage only goes to about 110*. i cleaned the 'button type' connecter but no change.
the sensor has been in the aluminum head for 30 years and am wondering i if i remove it the threads in the head will get destroyed due to the bi-metal corrosion effect ?
i did get a new 'button head' sensor from jegs.
i do have temp gun and shows it;s running 185 -190 at the thermostat housing.
runs just fine but temp guage only goes to about 110*. i cleaned the 'button type' connecter but no change.
the sensor has been in the aluminum head for 30 years and am wondering i if i remove it the threads in the head will get destroyed due to the bi-metal corrosion effect ?
i did get a new 'button head' sensor from jegs.
i do have temp gun and shows it;s running 185 -190 at the thermostat housing.
Team Owner
Joined: Sep 2003
Posts: 25,373
Likes: 2,734
That's what a person would expect and I can't offer any '1st hand experience' with an issue removing it so you're still looking!! Brass & aluminum you're most often told to expect issues. I'd think there are many who've been where you're at! I ain't.
Last edited by WVZR-1; Dec 8, 2020 at 01:22 PM.
Safety Car
Joined: May 2001
Posts: 4,747
Likes: 1,640
From: Fairfax Virginia
Welcome to the Corvette Forum 1990frankp!
If you are not sure try a "Bit of Heat" using a Hot Air Gun along with some good penetrating oil like "KROIL Oil." If you heat it up and spray it with penetrating oil a couple of three cycles virtually anything will break loose. Heat and oil work the best together. By heating the part first and then spraying it with oil the oil will be drawn into the joint or threads.
I use a Torch for heat when I feel secure and comfortable that I won't damage anything. I always get a Fire Extinguisher and have it handy when heating with a torch. The one on my 1988 came out with out any problems. The sensor housing was Brass and not Copper. Copper is what is incompatible with Aluminum. Brass is not an issue with your aluminum heads.
If you are not sure try a "Bit of Heat" using a Hot Air Gun along with some good penetrating oil like "KROIL Oil." If you heat it up and spray it with penetrating oil a couple of three cycles virtually anything will break loose. Heat and oil work the best together. By heating the part first and then spraying it with oil the oil will be drawn into the joint or threads.
I use a Torch for heat when I feel secure and comfortable that I won't damage anything. I always get a Fire Extinguisher and have it handy when heating with a torch. The one on my 1988 came out with out any problems. The sensor housing was Brass and not Copper. Copper is what is incompatible with Aluminum. Brass is not an issue with your aluminum heads.
