Groco FW 736 Heat Exchanger maintenance

[AZ-Oldguy]

While doing work on the cooling system on my Yanmar 3qm30, (new exhaust mixing elbow and manifold,) I thought I would do some maintenance on my heat exchanger. I wonder if anyone on this list has one of these, or knows where I might get instructions for disassembly.

Or should I just clean the outside, and put something caustic into the raw water side of the fins, and rinse it out?

I know it needs a few new gaskets, a new thermostat, and a brass plug on the end will need to be drilled out and replaced as it broke off.

Recommendations would be appreciated.

[Badsanta]

Radiator shop, if you can find one anymore.

[AZ-Oldguy]

Got it apart, a local machine shop drilled out and re-tapped the bad plug.
I am not sure what to soak it in, and i will probably need to make my own new gaskets.
It looks pretty good inside.



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