Upper Radiator Hose Leak

[Cisco82]

Hi guys,

im struggling with a leak on the upper radiator hose (engine side) , the rhermostat housing is new and the hose is new as well. I added two new hoses ties tring to fix the problem but is still leaks on the water goes on the belts that splash ito both car sides.

I try to tighten and tighten again but i m afrail im going to brake the housing or the hoses lol ... Any suggestion or tricks? Maybe the position of the ties or any trick to use to avoid this problem.

Thanks

[D Pizzoferrato]

Take a close look at clearances between your water pump casting and thermostat housing. I seem to recall some interference issues with replacement waterpumps. If that is your issue, I believe the small protrusion can be removed by grinding and not affect the pump.

[Cisco82]

Thanks but the problem is between hose and thermostat housing not between water pump / hose

[Mark]

Try putting permatex 3 on the inside of the hose, I remember it being in a tube a long time ago?Now it is in a can(less material, probably costs more?)

[rickf]

That is what I always use, Permatex #3. You may not be able to get Permatex there but I am sure you can get something similar. Is the housing smooth or is it corroded? Sometimes if you try to tighten a rubber hose TOO tight it will wrinkle inside and that will cause a leak. If all else fails and the thermostat housing is too rough for a seal you can get JB Weld epoxy, or again, similar over there, and fill in the rough areas of the housing and sand it smooth again. Then the hose should seal and the epoxy should have no issues with the coolant.

[Cisco82]

Thanks guys, the housing is new so it is smooth , i found permatex 3 in germany , expensive but every good thigs are expensive!

Would you suggest to put the sealant on ext housing surface and inner hose , wait few minute and then join them?

Thanks

[rickf]

I usually just swipe some on the inside of the hose end and slip it on and clamp it. But do not clamp it excessively tight. If the housing is smooth and you had a constant leak you may have a hole in the hose. If that is the case the sealer may seal it for a short time but it will come back. The sealer is not for repairing holes.

[m3a1]

I'm going to ask a simple question first (several, actually).

Are any aftermarket parts being used here?

For example, are your parts size compatible?

Are the clearances and tolerances correct?

I had a similar experience once. The hose went on the gooseneck just a little too easily. Distracted, I failed to question it at the time of assembly. Finally found the issue was the hose and the thermostat cover were simply not compatible size-wise and I never did get that to seal up.

I didn't believe it at first but came round to it. I tossed that thermostat cover in the trash and got another. Problem solved.

With elderly vehicles, it is important to keep in mind there are people out there who produce replacement parts (or shall I say, things that LOOK like replacement parts) who will take your money and sell you junk without the slightest guilt over the matter.

So, before you go laying on gobs of sealer, check to see if you don't have other issues first.

Cheers,
TJ

[Cisco82]

Thanks for the suggestion i ll double check but im pretty sure they are ok since they are both NOS and it was really hard to push the hose into thermostat housing.
Ill keep you updated

[Mark]

I had a cracked thermostat housing that leaked like that

[Cisco82]

Hi guys,

i slved the problem with permatex #3 suggested by rick , i used to seal (together with gasket) thermostat housing and water pump and it works really good.

i waited one day to let the seal work and today i put the water again and i start the engine.... bad surprise , there is still a water leak and it is on water pump, i m not able to see exactly but i think the gasket is ok but i i run my finger tip along the lower side of water pump i feel a lot of water in corrispondence of an hole positioned into the lower pomp side... is it normal there is a hole there? a plug is missing? or it is a safety hole and it means my pump is to be changed??

Im not able to fix this last issue...

Thanks

Francesco

[rickf]

You have the diagnosis correct, the seals in the pump have gone bad and that hole is there to let you know the fact. The pump will need to be replaced or if you can find a repair kit that can be installed. The water pump part number is a Cardone 59-244. That is a rebuilt pump for a Dodge slant six if I remember correctly which is the same pump. Some of the replacement pumps would hit on of the bolt heads on the timing cover but this only requires a very small amount of grinding on the pump to remedy.

[csmith]

If your looking to buy a pump try Army Jeep Parts, recently purchased one, they were on sale for $70, have bought before and this was the best pump I have seen so I purchased another to have as a spare. No need to grind the boss, fits perfect and gasket included.

[Cisco82]

thankyou , i ll purchase a spare one considering the fair price

[lpcoating]

Here is the water pump that AJP is selling:

20210408_210152.jpg

20210408_210159.jpg

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And for those that are really bored:

https://youtu.be/ZhG_UQfimkE

Guy