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Old 28-07-2018, 19:14   #1
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Yanmar Heat Exchanger corrosion

Had a leak develop from the end plate of the heat exchanger and when I removed it the O ring grove in the housing is corroded ( not the end plate)
My question is has any one had this problem and been able to have a machine shop build it up and machine it back with grove ect.

Or is it a few more boat bucks and replace with new ????
The motor is 4JH4-TE that is the 75hp turbo Job
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Old 28-07-2018, 19:30   #2
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Re: Yanmar Heat Exchanger corrosion

Is just the cap available?
I believe it's cast aluminum, which makes it not such a good candidate to weld up and remachine.

Reread your post, sounds like the main body has the damage? I'm afraid of the answer, but pretty sure I know what it is
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Old 28-07-2018, 21:24   #3
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Re: Yanmar Heat Exchanger corrosion

64 Thanks for the reply yes it is the body and I think you are right about welding alloy especially after being in salt water. My hand will be shaking when I ring my friendly Yanmar parts guy in the morning
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