Engine temp question. Weird? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rockyrivermark · 01-07-2017, 03:36 PM

1970 c10.
350 engine
New to me last week.
Ran one at sellers house. 40 degree that day in cleveland
This weekend installed
Edelbrock 2701 intake
HEI DIST
edelbrock 600 cfm electric choke
Timing set at 14 degrees
New 180 Mr gasket high performance thermostat.

Running it now in my shop with hose out the door port.
Won't warm up enough to open thermostat.
Been running a long time!
Runs smooth as hell but not to normal temp.
Any ideas? Radiator cap is off.
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LongBox · 01-07-2017, 03:42 PM

So you are saying that even with water not flowing through the rad (T'Stat closed), the engine will not warm up? Sounds like there's a bypass somewhere. Have you put your hands on the rad to see if it is getting warm?

garyd1961 · 01-07-2017, 03:46 PM

Are you sure the thermostat isn't opening? Does the top radiator hose get hot? Try blocking the air through the radiator and see if it heats up. I have never seen any motor that wouldn't heat up enough to open a thermostat. Maybe the thermostat is stuck in the open position.

rockyrivermark · 01-07-2017, 03:55 PM

brand new 180 thermostat was closed when I installed it.
I have a hand held infer red temp reader
Base of thermostat housing 164.
Heater hoses and rad hoses warm
Gauge on dash may be off. Stayed low
What I'm used to seeing after a radiator flush it once it filled back up you top off the radiator then run engine. Once stat opens the antifreeze level drops and you add more fluid.
Never happened
Who know maybe it was up to temp.
I'm guessing not a pump prob as that would cause an overheat.
Posted via Mobile Device

garyd1961 · 01-07-2017, 04:21 PM

If the top radiator hose is getting hot the thermostat is open. The temp gauge on these trucks usually about the 1/4 mark.

cdowns · 01-07-2017, 06:29 PM

try a piece of cardboard in front of the radiator to raise temp

garyd1961 · 01-07-2017, 06:54 PM

I don't think you have a problem. If the thermostat didn't open the motor would overheat. Just wait until you drive the truck and see how it does, I'll bet it does fine. 164 at the thermostat housing isn't bad for sitting still. There are a lot of people who wish they could get theirs to run 164.

01-07-2017, 03:36 PM	#1
rockyrivermark Registered User Join Date: Apr 2011 Location: Fairview Park, Ohio Posts: 1,031	Engine temp question. Weird? 1970 c10. 350 engine New to me last week. Ran one at sellers house. 40 degree that day in cleveland This weekend installed Edelbrock 2701 intake HEI DIST edelbrock 600 cfm electric choke Timing set at 14 degrees New 180 Mr gasket high performance thermostat. Running it now in my shop with hose out the door port. Won't warm up enough to open thermostat. Been running a long time! Runs smooth as hell but not to normal temp. Any ideas? Radiator cap is off. Posted via Mobile Device

01-07-2017, 03:42 PM	#2
LongBox Registered User Join Date: Sep 2016 Location: Vancouver BC Posts: 784	Re: Engine temp question. Weird? So you are saying that even with water not flowing through the rad (T'Stat closed), the engine will not warm up? Sounds like there's a bypass somewhere. Have you put your hands on the rad to see if it is getting warm? __________________ Rick -69 GMC 910 Long Box, 350 -98 Chev Silverado 1500, 350 Vortec 4L60e -08 Mustang GT Convertible

01-07-2017, 03:46 PM	#3
garyd1961 Registered User Join Date: May 2016 Location: Henderson NC Posts: 975	Re: Engine temp question. Weird? Are you sure the thermostat isn't opening? Does the top radiator hose get hot? Try blocking the air through the radiator and see if it heats up. I have never seen any motor that wouldn't heat up enough to open a thermostat. Maybe the thermostat is stuck in the open position.

01-07-2017, 04:21 PM	#5
garyd1961 Registered User Join Date: May 2016 Location: Henderson NC Posts: 975	Re: Engine temp question. Weird? If the top radiator hose is getting hot the thermostat is open. The temp gauge on these trucks usually about the 1/4 mark.

01-07-2017, 06:29 PM	#6
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Engine temp question. Weird? try a piece of cardboard in front of the radiator to raise temp __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

01-07-2017, 03:55 PM	#4
rockyrivermark Registered User Join Date: Apr 2011 Location: Fairview Park, Ohio Posts: 1,031	brand new 180 thermostat was closed when I installed it. I have a hand held infer red temp reader Base of thermostat housing 164. Heater hoses and rad hoses warm Gauge on dash may be off. Stayed low What I'm used to seeing after a radiator flush it once it filled back up you top off the radiator then run engine. Once stat opens the antifreeze level drops and you add more fluid. Never happened Who know maybe it was up to temp. I'm guessing not a pump prob as that would cause an overheat. Posted via Mobile Device

01-07-2017, 06:54 PM	#7
garyd1961 Registered User Join Date: May 2016 Location: Henderson NC Posts: 975	Re: Engine temp question. Weird? I don't think you have a problem. If the thermostat didn't open the motor would overheat. Just wait until you drive the truck and see how it does, I'll bet it does fine. 164 at the thermostat housing isn't bad for sitting still. There are a lot of people who wish they could get theirs to run 164.



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