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My dad gave me his Corvette, I've spent the last summer ironing things out, yeah my dad was a little bubba on things. Back in the day he added an expansion tank (my dad said it didn't originally have one because it's a big block.). So the heater core leaked and I looped the hose temporarily for now (see picture 1) and I shoved an old thermostat sending unit in the bottom of the expansion tank (see picture 2), my question is if I plug off the heater hose openings with pipe plugs what do I do with the hose at the bottom of the expansion tank? I know it used to tee into the heater hose (picture 3). Picture 1 Picture 2 Picture 3
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
I believe they should be 16 psi.
Correct, the 68 big blocks did not have an overflow tank. Could be just the early 68 didn't. If you have an overflow hose on your radiator you can run it into and expansion/ overflow tank and get rid of the old expansion tank
Correct, the 68 big blocks did not have an overflow tank. Could be just the early 68 didn't. If you have an overflow hose on your radiator you can run it into and expansion/ overflow tank and get rid of the old expansion tank
Yes there's the overflow hose on the radiator going to that tank (maybe my dad was using it like a puke tank?) then on the expansion tank there's an overflow hose on that too. That just goes to the ground..... What do I do about the hose under the tank that used to tee into the heater hose though? Does it need to connect to the water pump or manifold?
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Yes that will work until you can make it pretty. You could use long enough hoses that make it to the firewall and just make a U pipe to splice it and send it back so it looks normal. That all it's doing using the heater core.
Thank you rr! I'll go pretty it up some. I thought having it tee'd into the tank might cause an over hearing issue. That's why I looped it from pump to manifold but I'll loop it in with the tank as you described!
Heater bypass
