Is my engine running too cool? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rscam · 09-06-2009, 11:18 PM

My 350 runs about 145 degrees. It wil get to 160 in traffic. I have a 4 core radiator and 180 dgree thermostat and a non clutch flex fan. What problems will this cause? Bad performance? Bad MPG?

**WorkinLonghorn** · 09-06-2009, 11:23 PM

Either your gauge is wrong or your thermostat is sticking open. With a 180 thermostat the coolant doesn't even go to the radiator at 145. It starts to open at 180 and is fully open at something like 190. Until 180 is reached,the coolant is just circulated around the engine.

MTtruck · 09-07-2009, 12:16 AM

im running about 200-210 at the intake and block. I think thats about right!!!???

cdowns · 09-07-2009, 08:27 AM

get a good thermometer ,available at most grocery stores and take the actual temp of the coolant in the radiator and check your gauge for accuracy

09-06-2009, 11:18 PM	#1
rscam Registered User Join Date: Nov 2005 Location: Monroe,Georgia Posts: 313	Is my engine running too cool? My 350 runs about 145 degrees. It wil get to 160 in traffic. I have a 4 core radiator and 180 dgree thermostat and a non clutch flex fan. What problems will this cause? Bad performance? Bad MPG?

09-06-2009, 11:23 PM	#2
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,861	Re: Is my engine running too cool? Either your gauge is wrong or your thermostat is sticking open. With a 180 thermostat the coolant doesn't even go to the radiator at 145. It starts to open at 180 and is fully open at something like 190. Until 180 is reached,the coolant is just circulated around the engine. __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, 2nd owner, Work-Truck supreme. Best $300 I ever spent.

09-07-2009, 12:16 AM	#3
MTtruck Registered User Join Date: Jul 2009 Location: Bozeman, Mt Posts: 59	Re: Is my engine running too cool? im running about 200-210 at the intake and block. I think thats about right!!!??? __________________ Paul"Give old trucks a second chance"

09-07-2009, 08:27 AM	#4
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Is my engine running too cool? get a good thermometer ,available at most grocery stores and take the actual temp of the coolant in the radiator and check your gauge for accuracy __________________ 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



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