Heater fitting thread??

[1956322]

Anyone know the size of thread for the heater fitting that threads into the radiator... Just tried a 1/2 not and that was to big..

[1956322]

Looks like it's 3/8 not.. Not common with a 3/4 nipple

[Beemon]

The only thing that threads into a 56 Radiator is the Dynaflow cooler lines. Do you mean the water pump?

[1956322]

There is a heater fitting where the heater core returns to.. Lower passenger side 

[1956322]

Well this ended up being trickier then I expected..I  can  not find a fitting that's 3/4 nipple and 3/8th npt to save my life..I  found a 3/4 and 3/8 nps fitting but that's it.. For now I went with the 5/8th nipple and 3/8th npt.. And I'll use a hose adopter of 5/8th to 3/4... Sighs

[Bhigdog]

On ‎5‎/‎26‎/‎2017 at 9:37 PM, 1956322 said:

Well this ended up being trickier then I expected..I  can  not find a fitting that's 3/4 nipple and 3/8th npt to save my life..I  found a 3/4 and 3/8 nps fitting but that's it.. For now I went with the 5/8th nipple and 3/8th npt.. And I'll use a hose adopter of 5/8th to 3/4... Sighs

 

Got a fiend with a lathe? Simply make and braze a 3/4" bushing over the 5/8" one and viola, near instant permanent and undetectable fix. If you pay postage both ways I'll do it N.C.............Bob

[1956322]

That's a good idea.. I'll have to give that some thought:)

[Bhigdog]

Ideally use a brass fitting with a brass sleeve. Makes soft soldering easy and corrosion resistant. McMaster lists a 3/8 X 5/8 barb fitting in brass..............Bob