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BUSY BOLTERS Are you one?  The Shop Area
continues to pull in the most views on the Stovebolt. In August alone there were over 22,000 views in those 13 forums.
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Jul 21st, 2025 | | | | Joined: Dec 2013 Posts: 13 New Guy | | New Guy Joined: Dec 2013 Posts: 13 | My 59 GMC 327 V8 (Pontiac) just got an engine rebuild. Part of it was a new temp sender on the engine. Now, the temp gauge pegs past H after the warm up. Is there a way to recalibrate the gauge to dial back the needle into the more normal operating range? (the engine is not overheating, just the gauge reading high.)
Michael Merriman
1959 GMC 100-8
Saint Helena (Napa Valley), CA
| | | | | Joined: May 2001 Posts: 7,440 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,440 | I'd say the new sender was put in with teflon tape and it can't ground properly. The sender is a variable resister to ground. I use pipe dope called T+2. | | | | | Joined: Oct 2013 Posts: 219 Shop Shark | | Shop Shark Joined: Oct 2013 Posts: 219 | X2 on the grounding, I just had the same issue with one of mine pegging. My issue was lack of ground on the gauge cluster housing but acted the same way. Once I got it grounded properly the gauge worked fine. | | | | | Joined: Nov 2005 Posts: 1,501 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 1,501 | Is teflon tape THAT good of an insulafor on pipe threads?
1941 Chevy stock complete
1941 GMC resting peacefully
1946/1947 Chevy Street rod on s10 frame complete
1945 GMC panel truck in line for restoration
1941 Plymouth stock complete
1941 GMC COE in restoration process
1941 Chevy Coe uncertain future resting now
| | | | | Joined: Dec 2013 Posts: 13 New Guy | | New Guy Joined: Dec 2013 Posts: 13 | Took off the teflon tape and reinstalled. Gauge still pegs past hot. Any other ideas?
Michael Merriman
1959 GMC 100-8
Saint Helena (Napa Valley), CA
| | | | | Joined: Mar 2010 Posts: 10,059 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,059 |
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Mar 2005 Posts: 1,629 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,629 | Might check this out for grins and giggles. I ran across this a while back and had to change out the sender. http://www.lectriclimited.com/mainpage.htm | | | | | Joined: Apr 2005 Posts: 2,832 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,832 | You must have a mismatch between the sender and the gauge. Rock Auto has senders for all 59 GMC engines for around five bucks. For that price I would get one I KNEW was for a 59 GMC.
Evan
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