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Old 04-13-2019, 05:14 PM
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overez overez is offline
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Join Date: Aug 2012
Location: Lopez Island, WA
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Red face Sticky valves and corrosion, next steps

Thanks to all who have weighed in. My next steps will include reworking the exhaust hot section to reduce the splashback/moisture issues that appear to be the primary cause of internal corrosion of the manifold and #4 valves. I'll replace the third manifold stud and look for internal leaks. And I'll regrind those seats by hand (to avoiding pulling the motor), unless guide wobble indicates a deeper problem. I've also identified and am addressing a leak in the heat exchanger that could be the primary source of external corrosion issues that became apparent earlier. Thanks again.
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