Trouble with lower radiator hose leaking

Bob Lynch · Mar 23, 2022

Hello Everyone:
After years of wanting and searching, I finally have my '67 GTX W/440, and now I'm on the way to making it a nice ride. Just installed new radiator, fan, fan clutch, fan shroud and hoses. I'm having a problem with the engine block lower radiator hose outlet. It has some pitting and porosity around the cast iron outlet diameter and neck, and the hose is not sealing well, keeps leaking. Has anyone else had this problem, and what is a good fix for it? Hose clamp is tight as heck, just won't seal.
Thanks

mr. b · Mar 23, 2022

welcome to FBBO nice looking GTX

oldbee · Mar 23, 2022

Welcome aboard from Ohio.

pnora · Mar 23, 2022

Clean it well with brake clean. Sand it and clean it again. Also clean the hose. Put a light skim cote of RTV on it and install the hose. Also make sure it is not coming from the water pump weep hole and running down.

69 Sleeper Bee · Mar 23, 2022

Welcome from North Florida !!!
Nice GTX.
May need a new water pump housing if it is pitted bad. I have seen using JB weld on the pits and sanding smooth but that is a patch.

Bob Lynch · Mar 23, 2022

OK, Thanks for all the info guys, really appreciate it !!
I'll double check the water pump, use some RTV and give it a go again.
Can't wait to get this thing up and running and get on the Coast Highway here in CA.
Love pulling up next to Ferrari's and making them roll up the windows!!

BMosely · Mar 23, 2022

Worth a shot without outlet remediation. Permatex Aviation Sealer. Clean inside hose and outlet. Apply liberally to both and let dry per directions. Button up and clamp. Really sticky stuff once set. Solved my chrome thermostat neck that is too slick.

493 Mike · Mar 23, 2022

Try a Gates Power Grip clamp. They are shrink material that keeps constant tension on the hose. I had a new T-stat housing, new hose, and two spring clamps and couldn't stop a leek. The Power Grip did and they give a clean look under the hood.
Mike

R413 · Mar 23, 2022

RTV is the wrong sealer for that. Try Indian head gasket compound by permatex. Put a coat on the hose and the housing wait for it to get tacky and install. Let dry before putting in the coolant.

silly question, is the lower hose new? Is it the correct molded hose for the car? 1.75” Opening?

polywideblock · Mar 23, 2022

G, day from Australia :welcome:

Bob Lynch · Mar 23, 2022

Yes, lower hose is a correct & new Gates hose, 1.75" opening.
I did notice the pitting in the housing, but didn't think too much of it because the old hose wasn't leaking.
Now I realize, I should have addressed it when everything was out.
Thanks for the input Mike and R413.

451Mopar · Mar 23, 2022

Another option, aluminum water pump housing:
http://store.440source.com/Water-pump-housing-Aluminum-Drivers-Side-Lower-Hose/productinfo/200-1038/

Bob Lynch · Mar 23, 2022

Thanks Aussie, nice rides yourself !!

Bob Lynch · Mar 23, 2022

451Mopar said:
Another option, aluminum water pump housing:
http://store.440source.com/Water-pump-housing-Aluminum-Drivers-Side-Lower-Hose/productinfo/200-1038/

Thanks for the Link, I'll address this tonight and see what I'm up against.
If the housing is done, I'll replace it and the pump.
Should have done that to begin with, but everything looked OK. If I coulda shoulda...

Budnicks · Mar 23, 2022

welcome to FBBO from NorCal Sierras

this is the only, the welcome wagon
it's intended more for intros & getting to know each other
sharing a few ride photos & backstories etc.
not really a Q&A tech section

this really isn't the proper forum for the tech stuff
there's also not much viewership as
General discussion
or other specific related forum section
get more help/more exposure too

good luck

Bob Lynch · Mar 23, 2022

Budnicks said:
welcome to FBBO from NorCal Sierras

this is the only, the welcome wagon
it's intended more for intros & getting to know each other
sharing a few ride photos & backstories etc.
not really a Q&A tech section

this really isn't the proper forum for the tech stuff
there's also not much viewership as
General discussion
or other specific related forum section
get more help/more exposure too

good luck

Thank you for that, new guy here, I'll make a note of it.

68sprtsat383 · Mar 23, 2022

Welcome

Hey-O · Mar 24, 2022

Welcome from Missouri!!

moparedtn · Mar 24, 2022

Grabbergreendream · Mar 24, 2022

Welcome!
Also, I'll second the Indian Head shellac that R413 mentioned. You can get it just about anywhere that carries permatex products. If the hose is correct, it will seal up.
I would NOT use RTV.

Trouble with lower radiator hose leaking

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