6066 (1960-1966) GMC Truck Club - Question about coolant....

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Oldcarcat

September 19th, 2021 04:55 AM

Question about coolant....

How much coolant does it take for for a 1966 GMC truck V6 305 engine?

Ed Snyder

September 19th, 2021 06:07 AM

Re: Question about coolant....

Quote:

Originally Posted by Oldcarcat (Post 74677)

How much coolant does it take for for a 1966 GMC truck V6 305 engine?

Eight Gallons

POWERSTROKE

September 21st, 2021 05:46 PM

Re: Question about coolant....

WOW! That's a LOT! GMC always advertized their V-6's circulated a LOT of coolant. Definetly built for heavy-duty use.

My 7.3L PSD also holds 8 gallons of coolant.

Oldcarcat

September 22nd, 2021 05:19 AM

Re: Question about coolant....

Mr. Ed Snyder, thank you!

LEWISMATKIN

September 24th, 2021 02:08 AM

Re: Question about coolant....

Quote:

Originally Posted by Ed Snyder (Post 74678)

Eight Gallons

That is if you aren't running an oversize radiator and heater core. if you are, add between 1/2 to 1 gal. to what Ed has said.

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