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Old 08-08-2018, 13:49   #1
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Carbon/soot floating in exhaust water

Lately when I start my Westerbeke 21 there is a large film of what looks like carbon/soot exiting the wet exhaust system for a good ~5-10 minutes. It seems to stop once the engine warms up.

Earlier this season I found 2 bad glow plugs which were contributing to difficulty starting. There were probably 6-10 times that I tried to start the engine and it took multiple tries before finally cranking. I assumed once this was resolved the exhaust film would clear up, but it's been months now.

Any suggestions?

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Old 08-08-2018, 15:15   #2
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Re: Carbon/soot floating in exhaust water

Check valve adjustment and have your injectors serviced by an injection shop.
Ithink you have dirty injectors, but checking valves unless you have done recently is never a bad idea
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Old 10-08-2018, 13:30   #3
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Re: Carbon/soot floating in exhaust water

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Originally Posted by a64pilot View Post
Check valve adjustment and have your injectors serviced by an injection shop.
Ithink you have dirty injectors, but checking valves unless you have done recently is never a bad idea
Should I try using a product like SeaFoam in my fuel filter to help clean them out first? The last time the engine had major service was 2009.
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Old 10-08-2018, 14:11   #4
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Re: Carbon/soot floating in exhaust water

Ditto on injectors. I had this very same issue. Pulled the injectors, which all needed to be rebuilt. Easier starting and no soot now.
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Old 10-08-2018, 14:12   #5
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Carbon/soot floating in exhaust water

Nothing you can put into the fuel can properly clean an injector, plus there is more to servicing than cleaning.
It doesnít cost much to have them serviced and is something that should be done every so often anyway, I think about every 500 hours, although fuel quality greatly impacts that number.

Iím not saying that is absolutely 100% your problem, but itís the most likely candidate in my opinion, and something that should be performed regularly anyway, like a valve adjustment.
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Old 10-08-2018, 14:13   #6
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Re: Carbon/soot floating in exhaust water

Oh, I am also using a biocide to keep gunk down. Can't remember name of it, but was reccommended by several people including the diesel shop.
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Old 10-08-2018, 16:37   #7
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Re: Carbon/soot floating in exhaust water

Biobor JF ?
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Old Yesterday, 17:30   #8
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Re: Carbon/soot floating in exhaust water

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Biobor JF ?
My mistake...it's not a biocide but Stanadyne fuel additive (Performance Formula) that I started using after getting the injectors rebuilt. It's this one: https://promo.parker.com/promotionsi...us/en/products
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