The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 71 350 running hot coolant backup up problem

**Steeveedee** · 01-06-2018, 11:19 PM

It shouldn't be running 215F at that temp. Pulling a 26' travel trailer on level ground, I don't get that hot, this time of year. The bypass for a SBC is inside a water pump passage, not like a big block, so it doesn't matter what intake one is running, given the old style heads.

You need to let it settle down, and get it full of water, for starters. It should be full when you run water into it, especially without a thermostat. You have something else going on, if it overheats at idle. Do you have a clutch fan?

01-06-2018, 11:19 PM	#6
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,104	Re: 71 350 running hot coolant backup up problem It shouldn't be running 215F at that temp. Pulling a 26' travel trailer on level ground, I don't get that hot, this time of year. The bypass for a SBC is inside a water pump passage, not like a big block, so it doesn't matter what intake one is running, given the old style heads. You need to let it settle down, and get it full of water, for starters. It should be full when you run water into it, especially without a thermostat. You have something else going on, if it overheats at idle. Do you have a clutch fan? __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA