martanke Posted July 15 Report Share Posted July 15 I am restoring a 323.5ci straight 8 for my wodden boat and have found a good industrial block to work with. This industrial engine had the sodium cooled exhaust valves, and so did the most powerful marine versions. I want to keep the valves but there are no new guides available (they are quite a bit larger than the intakes). I will put bronze sleeves on the intake guides but my machinist does not have a sleeve kit for the larger guides. We will start by honing the guides and measure. What is the experience on this forum of heavy duty applications, is slightly larger guide to stem clearance acceptable? Quote Link to comment Share on other sites More sharing options...
Solution Dodgeb4ya Posted July 15 Solution Report Share Posted July 15 MoPar flathead .433" sodium exhaust valve to guide clearance's are spec'd at .003"-.005". On a Chrysler marine engine like the Royal or Majestic they run under heavy load... I'd be at the higher end of spec. Quote Link to comment Share on other sites More sharing options...
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