Intake corrosion, years of no heat riser

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mspeters
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Intake corrosion, years of no heat riser

Post by mspeters » Sun Mar 26, 2017 2:32 pm

This manifold had run for unknown number years, perhaps decades, with no heat riser valve.
Water from fire up collects from both heat tubes and settles in the manifold and corrodes the freeze plugs in the exhaust portions. This is supposedly an asbestos based paste, take precautions & obviously don't grind or blast.

Image


Unable to locate a replacement heat valve, I now run block off plates at the manifolds under heat tubes.


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