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Maintenance / '68 SS Console temp gauge not working
« on: May 15, 2011, 05:38:49 PM »
My temperature gauge is not working or barely registering on the cold side. It’s not worked since I got the car a couple months back. I had a small anti-freeze leak at the sending unit so at the same time I had the shop put a new sending unit in thanking the other was bad and I’m getting the same cold reading on my gauge. I did some research on google and a couple searches I found tech threads that say when installing temp sending unit do not use teflon tape or any thread dope as the unit will not ground properly. Of course when the shop changed mine out they used thread dope but it wasn’t working prior so not sure if it was doped or not. I’m certain that we used the right part number for the gauge application and check grounded the wire and the gauge will fly to the hot side signaling it works. I’ve bought another temp sending (ac delco) and plan on changing it out this weekend (after cleaning threads the head) but now I’m concerned about threading it in without anything on the threads preventing it from seeping anti-freeze again.
Update: Changed out to new gauge (a/c delco G1852 #12334869) same as pulled out. Installed with no thread dressing ran motor up to temp (180) still gauge only will register one line above cold. Grounded temp unit wire and console gauge will fly all the way too hot side. Hooked wire bace to sensor and ran motor temp up to 190 and still no reading change. Had to pull sensor back out to teflon threads to keep from leaking. The only thing I know to do is change out temp gauge in console maybe gauge is bad but I can't figure out why when we test ground wire gauge registers!
Has anyone had this issue - how difficult or easy is the gauge to change out?
thanks for any feedback. . .rags
Update: Changed out to new gauge (a/c delco G1852 #12334869) same as pulled out. Installed with no thread dressing ran motor up to temp (180) still gauge only will register one line above cold. Grounded temp unit wire and console gauge will fly all the way too hot side. Hooked wire bace to sensor and ran motor temp up to 190 and still no reading change. Had to pull sensor back out to teflon threads to keep from leaking. The only thing I know to do is change out temp gauge in console maybe gauge is bad but I can't figure out why when we test ground wire gauge registers!
Has anyone had this issue - how difficult or easy is the gauge to change out?
thanks for any feedback. . .rags