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FirstCandC 06-02-2014 08:36 AM

Leaking Heat Exchanger
Been noticing a small drip under the bottom of the bulkhead mounted heat exchanger. When I start the engine, it starts spraying a pretty decent amount. Is it possible to spot weld this part? I do not know how old it is.

Brewgyver 06-04-2014 11:30 AM

Re: Leaking Heat Exchanger
Can you provide any info on the HE? It would be nice to know the manufacturer, but at the very least the material. A picture would help.

While not technically a spot weld, a brazed repair might be possible, depending on the material. Some people have had success using JB weld type epoxy for pinholes and small cracks.

FirstCandC 06-04-2014 12:41 PM

Re: Leaking Heat Exchanger
Thanks for the response. Third item down in the link below is the replacement part. Unfortunately, I do not have a photo of my current exchanger.
Moyer Marine Atomic 4 Engine Rebuilding and Parts

Probably going to just go ahead and buy a new one. Going to take the part off for a looksie this weekend. But I hope there isn't an underlying problem which is creating too much pressure on the HE? The oil looks good (and pressure is steady at 40) , temp has been good too (around 180). I don't think it is a head gasket problem.

Capt Len 06-06-2014 04:40 PM

Re: Leaking Heat Exchanger
Unless the body has gone porous with electrolysis a simple silver solder or braze can fix a fatigue crack or?? Too much heat can effect the tubes so careful.

Hudsonian 06-08-2014 10:22 PM

Re: Leaking Heat Exchanger
Take the heat exchanger to a radiator repair shop to have it pressure tested. When they determine where it's leaking they'll probably be able to repair it on the spot.

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