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7 members (kades51, David Bush, MikeE, Bucker, MickeyP, Rexville48, dt235sd),
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Mod | | | Forums66 Topics128,049 Posts1,055,702 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Jun 2008 Posts: 1,644 'Bolter | | 'Bolter Joined: Jun 2008 Posts: 1,644 | A friend of mine just replaced a blown head gasket on his 235, and I strongly suggested he drain the radiator and install fresh Xerex green coolant. His 1951 half ton is all original. How many gallons does his Harrison radiator hold? Thanks.
Chuck
1950 Chevy 1/2 ton (all original)
1951 Chevy 1/2 ton (future streetrod)
1941 Chevy coupe
1938 Chevy coupe streetrod
| | | | | Joined: Mar 2019 Posts: 119 'Bolter | | 'Bolter Joined: Mar 2019 Posts: 119 | If you check the Oner’s Manual for a 1951 Chevy truck you will see that the total cooling system capacity is 15 quarts. If there is a passenger compartment heater the capacity is 16 quarts.
So you need 8 quarts (2 gallons) of antifreeze to achieve a 50/50 solution.
Rusty
| | | | | Joined: Jun 2008 Posts: 1,644 'Bolter | | 'Bolter Joined: Jun 2008 Posts: 1,644 | Thanks Rusty for the answer and for the math! LOL I’ll text my friend that he needs to buy 2 gallons of Zerex.
Chuck
1950 Chevy 1/2 ton (all original)
1951 Chevy 1/2 ton (future streetrod)
1941 Chevy coupe
1938 Chevy coupe streetrod
| | | | | Joined: Mar 2004 Posts: 6,214 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,214 | Just helping with the math...lol He'll need 2-gallons of Concentrate (add your own water to make a 50/50 mix) or 4 gallons of pre-mixed 50/50... Mike B  | | | | | Joined: Dec 2008 Posts: 1,922 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 1,922 | and a good estimate of how much water is still in the block. | | | | | Joined: May 2004 Posts: 920 'Bolter | | 'Bolter Joined: May 2004 Posts: 920 | I would also pull the plug near the bottom of the block on the drivers side, and flush. Fill and run it with a cleaner and the heater on. Empty and flush again. Then fill with new coolant. | | |
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