Stock water temp gauge trouble - The 1947 - Present Chevrolet & GMC Truck Message Board Network

blazer2007 · 06-28-2022, 09:59 AM

I have a stock 350 that is fairly new and I put a new rad in this spring and now the gauge slowly pegs to overheating but the headers are hot but can touch them and the coolant is hot but not boiling hot. Both hoses are warm. What do you think, gauge just not good no more, or the sending unit is touching the back side of the head maybe. ( I did have it out to drain water ) This is the first start up since I parked it last year.

**Corts60** · 06-28-2022, 01:24 PM

Most likely you have air trapped in there.

blazer2007 · 07-01-2022, 09:05 AM

Thanks ,never had air lock ever in my life, but anyway I think I got it. Tried once and it didn,t work and then tried again with cap off and coolant was down about a couple inchs and wasn,t working so I shut off the truck and got a big sloosh of air and water out of the rad. Hope that was it , ran out of coolant.

blazer2007 · 07-03-2022, 07:53 PM

glad you got it fixed

06-28-2022, 09:59 AM	#1
blazer2007 Registered User Join Date: Jan 2007 Location: vernon b.c. Posts: 3,022	Stock water temp gauge trouble I have a stock 350 that is fairly new and I put a new rad in this spring and now the gauge slowly pegs to overheating but the headers are hot but can touch them and the coolant is hot but not boiling hot. Both hoses are warm. What do you think, gauge just not good no more, or the sending unit is touching the back side of the head maybe. ( I did have it out to drain water ) This is the first start up since I parked it last year.

06-28-2022, 01:24 PM	#2
Corts60 Just here to tinker Join Date: Jun 2008 Location: Holland, MI Posts: 3,672	Re: Stock water temp gauge trouble Most likely you have air trapped in there. __________________ 78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(winter unit)https://67-72chevytrucks.com/vboard/...25#post8900725

07-01-2022, 09:05 AM	#3
blazer2007 Registered User Join Date: Jan 2007 Location: vernon b.c. Posts: 3,022	Re: Stock water temp gauge trouble Thanks ,never had air lock ever in my life, but anyway I think I got it. Tried once and it didn,t work and then tried again with cap off and coolant was down about a couple inchs and wasn,t working so I shut off the truck and got a big sloosh of air and water out of the rad. Hope that was it , ran out of coolant.

07-03-2022, 07:53 PM	#4
blazer2007 Registered User Join Date: Jan 2007 Location: vernon b.c. Posts: 3,022	Re: Stock water temp gauge trouble glad you got it fixed



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