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View Full Version : Question about coolant....

Oldcarcat
September 19th, 2021, 04:55 AM
How much coolant does it take for for a 1966 GMC truck V6 305 engine?
Ed Snyder
September 19th, 2021, 06:07 AM
How much coolant does it take for for a 1966 GMC truck V6 305 engine?

Eight Gallons
POWERSTROKE
September 21st, 2021, 05:46 PM
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
Mr. Ed Snyder, thank you!
LEWISMATKIN
September 24th, 2021, 02:08 AM
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.