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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Sep 2000 Posts: 136 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2000 Posts: 136 | Well, it's been a good winter so far in VT--plenty of snow, but not too much. I'm looking forward to spring so I can put my 57 back on the road, but need to address a temperature issue. My truck has the original radiator, which has been cleaned and tested, with a 350 engine and short water pump. After the engine warms up, the temp gauge goes all the way to hot. I replaced the gauge, and it still happens. Water in the radiator is hot, but not boiling, and there is never any dangerous pressure when removing the cap. The fan is quite a distance from the radiator (several inches). Do I need a shroud or a new temperature sending unit? | | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Russell,
You are alluding to the fact you don't think the gauge that reads HOT reflects actual engine temperature..correct!
A simple thermometer in the radiator filler neck will give you true water temperature which you can then compare to the gauge.
A new sending unit doesn't cost very much. If I were questioning it at all, I would start with the sending unit then see what happens.
This is assuming the system is full, purged and the thermostat is functioning properly.
Many radiator shops consider a 'cleaning' a reverse flush and paint job. If the tubes are partially plugged with mineral deposits, which are almost impossible to remove, then your radiator can't do its job properly and you will never triumph.
Stuart | | | | | Joined: Feb 2008 Posts: 12 New Guy | | New Guy Joined: Feb 2008 Posts: 12 | If everything checks out good you may have to put a shroud on. I know when I was racing a shroud was the ticket. You can also put in something call water wetter it helps cooling by 10 to 20% | | | | | Joined: Mar 2006 Posts: 1,703 Shop Shark | | Shop Shark Joined: Mar 2006 Posts: 1,703 | Russell,
I also have a 350 , Long water pump an still had to use a spacer behind the fan blade to get it to the recomended 3/4" from the radiator, I have no overheat issues.
If all tests prove ok an ya still gettin HOT ...I would try a long water pump and get your fan closer.
Just my 2 pennies
Tim | | |
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