The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - TF running hotter on highway than in-town.

yossarian19 · 09-07-2015, 11:10 AM

Running hot at highway speeds isn't likely to be an airflow issue. I'd look at your water pump.
Running hot around town, sure, all the above suggestions about removing airflow restriction makes sense - but if you are shedding enough heat just puttering around town with no airspeed across the front of the vehicle, you darn sure have enough airflow at 70 mph. What you haven't got is coolant flow through the radiator.

09-07-2015, 11:10 AM	#42
yossarian19 Registered User Join Date: Sep 2011 Location: Nevada City, CA Posts: 908	Re: TF running hotter on highway than in-town. Running hot at highway speeds isn't likely to be an airflow issue. I'd look at your water pump. Running hot around town, sure, all the above suggestions about removing airflow restriction makes sense - but if you are shedding enough heat just puttering around town with no airspeed across the front of the vehicle, you darn sure have enough airflow at 70 mph. What you haven't got is coolant flow through the radiator. __________________ "Over my head" 1957 Chevy 3200, big rear window & 6 lug. Front disc, power steering, Vortec 4.8 / 4L60E swap, hydro boost brakes & patina.