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Exhaust Manifold Crud |
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MI-nick 
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Joined: January-12-2009 Location: Ypsilanti, MI Status: Offline Points: 810 |
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 Topic: Exhaust Manifold CrudPosted: October-31-2014 at 2:54pm |
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This is what came out of the manifolds when I drained this year...actually this is what I usually get. '99 SAN with GT-40 ~900hrs...~100hrs this summer. normal?? concern?? It looks like rust flakes...but not quite...
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As far as I can tell, I'm not quite sure...
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Hollywood
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Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13515 |
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Posted: October-31-2014 at 3:10pm |
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You will get rust when draining a cast iron manifold. Do you get this much crud on an annual basis? The first time I drained there was a lot, but not as much year after year now.
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MI-nick
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Joined: January-12-2009 Location: Ypsilanti, MI Status: Offline Points: 810 |
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Posted: October-31-2014 at 4:04pm |
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that seems to be pretty much "normal" for this boat...my '88 has some too...but maybe ~1/8 the amount...
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As far as I can tell, I'm not quite sure...
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Gary S
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Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Posted: October-31-2014 at 11:04pm |
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More than I ever get out of PCM ones,the aluminium HM's get nothing out. Maybe your water is on the acidic side?
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malibud
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Joined: July-08-2009 Location: north carolina Status: Offline Points: 613 |
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Posted: November-07-2014 at 10:01am |
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I think that is normal. wow and a hundred hours in one season up there. I am lucky to see 40 in NC
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phatsat67
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Joined: March-13-2006 Location: Indiana Status: Offline Points: 6157 |
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Posted: November-07-2014 at 10:46am |
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I do between 70-110 hours a season and never get anything out of my PCM manifolds. They are stored dry every winter.
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Hollywood
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Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13515 |
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Posted: November-07-2014 at 2:33pm |
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I guess there's a chance you sucked up some muck/crud at one time that settled in the manifolds.
Do you drain them every year? |
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