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Old 11-17-2015, 10:08 PM   #96
R_p_ryan
Senior Member
 
City: San Francisco
Vessel Name: Shellbourne
Vessel Model: 1978 Mainship 34 Perkins T6.354
Join Date: Dec 2014
Posts: 171
My air charge cooler had heavy scale on the inside. I cleaned it all out with a wire wheel, even the nipples, one of which lost about 3/16" on one side. It's all solid iron and despite the corrosion, it's structurally sound. I added epoxy to the inside of the casing and I'm adding a zinc to help address the steel breaking down. I don't know if those will save it for four more decades, or just until the next season. But it's due for de-assembly next year. It the casings show wear problems next year then I'll have to consider the plastic housing option.

Thanks,
RR
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