Hello have a 53 ,3100 ,with the round heater core mounted under the dash , 216 motor. Heater hose connections are on the thermostat housing and one on the water pump. Does it matter how the heater hose are connected to heater core? Or which way are they to be connected. Thanks
I installed the new ones the same way the red ones were. Works perfectly. Same round heater core as yours.
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
A heater core will flow either way. The pressurized coolant comes from the thermostat housing, and returns to the water pump. That also keeps coolant circulating through the engine during warmup before the stat opens, unless someone has installed a cutoff valve in one of the heater hoses. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
You might consider installing a shut-off on the pressure side so you can shut it off in summer. I have seen many with a gate-valve installed at the thermostat housing. A quarter-turn valve would work just fine too if there's room to turn the handle.
Last edited by 1Ton_tommy; 08/31/202312:42 PM. Reason: correct typos
1951 3800 1-ton "Earning its keep from the get-go" In the DITY Gallery 1962 261 (w/cam, Fenton headers, 2 carbs, MSD ign.), SM420 & Brown-Lipe 6231A 3spd aux. trans, stock axles & brakes. Owned since 1971.
Related - when I swap in my 235 engine (from 58 car) I don't plan to connect the heater; Can I just plug the two ports in the pump and the T'Stat housing, vs having a hose loop between them? I seem to recall one post that said at least a loop HAD to be included but that was perhaps related to a 261 engine?
'51 Chevy 3100 Truck - OEM 216 Engine; three speed column shift transmission 6 Bolt disc conversion with dual master/vacuum booster 12V alternator conversion. 235 engine in waiting
Yes. The engine isn't going to know the difference. You can either put a little shut off valve on the engine somewhere or loop it or block both inlet and outlet all together since the engine cooling system is completely independent from that of the heater core. The trucks were sold without heaters unless you paid extra to get one and so there would just be a little brass plug screwed into those two holes
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
Luray, Here is a picture of my In-line shut-off valve. I bought it at my local Napa. The cable is the "Throttle" from the dash. It works great. Off in summer On in winter. Good luck. Todd
