Plug rust
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=42700
Printed Date: November-15-2024 at 6:11pm
Topic: Plug rust
Posted By: WinterTurtle
Subject: Plug rust
Date Posted: April-30-2018 at 2:18pm
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Sunday's work went well overall on the 79 Southwind / 351 -- flushed out all the cooling passages and found bark fragments blocking about half of the trans cooler along with the normal mud and gunk. Replaced with automotive oil sender with a marine unit. Pulled the plugs, squirted in some oil, primed the oil system (holds 40psi) and turned her over a bit with a ratchet. Just need to get the carb on her and hopefully I've still got spark. I'm getting close! So the plugs were gapped somewhere around .017 and were too tight for my trusty autozone plug coin to fit in the lowest setting. Odd -- not sure what that was about... Gapped to .035 and reinstalled -- but was concerned to see corrosion on #6. I've seen riser gasket talk in a few places on the site -- I'm guessing that's the likely culprit? Are there any other potential causes maybe relating to the cylinders' 10-year fuel soak?   ------------- 1979 Southwind 18 351w Not Running - All Potential! |
Replies:
Posted By: MrMcD
Date Posted: April-30-2018 at 5:07pm
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No doubt it had water in there or it would not have rusted. You are on the right track. ------------- |
Posted By: KENO
Date Posted: April-30-2018 at 5:45pm
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I'd start it up to make sure it runs and has no other issues, then do a compression test. You could also have a head gasket issue on that side causing the problem and if nothing else the compression test will give you some info on the engine condition. If those plugs are arranged the same as they are in the engine, the porcelain on #5 looks quite a bit cleaner than the others which could be from water too. So..........run it, check things and see what issues you might have and go from there is what I'd do. |
Posted By: gt40KS
Date Posted: April-30-2018 at 7:59pm
My thoughts exactly. I'm thinking a riser gasket may have caused this issue with most or all of the ones on that side of the engine to look very similar. ------------- JCCI 1995 Ski Nautique GT40 |
KENO wrote: