77 c-10 305 OVERHEATING! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

77pdxC-10 · 06-06-2006, 03:15 PM

Replaced with a better fan, new radiator hoses and thermostat and is still overheating. Is it possible it could be the water pump? Even when it gets hot enough and the thermostat opens there is almost no pressure in the upper radiator hose! Shouldn't it build pressure eventually. Also this started when I rebuilt from the heads up! Basically what I am asking is do you think more towards the water pump or the radiator which are both relatively old.

06-06-2006, 03:15 PM	#1
77pdxC-10 Registered User Join Date: Feb 2006 Location: Portland, OR Posts: 47	77 c-10 305 OVERHEATING! Replaced with a better fan, new radiator hoses and thermostat and is still overheating. Is it possible it could be the water pump? Even when it gets hot enough and the thermostat opens there is almost no pressure in the upper radiator hose! Shouldn't it build pressure eventually. Also this started when I rebuilt from the heads up! Basically what I am asking is do you think more towards the water pump or the radiator which are both relatively old. Last edited by 77pdxC-10; 06-06-2006 at 03:15 PM.

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