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Sludge on top of the piston at 10K (Read 316 times)

bill67 Serious Thumper Offline old tired Posts: 8517 genoa city wisconsin Gender:	Re: Sludge on top of the piston at 10K Reply #15 - 11/09/10 at 08:36:29 Charon wrote on 11/09/10 at 06:03:12: The "metering rod" is more commonly known as the "needle." jet needle
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Re: Sludge on top of the piston at 10K
Reply #16 - 11/09/10 at 18:30:01

Getting back to the first question, sludge on top of the piston, Oldfeller asked if the engine had been smoking during sudden acceleration and the answer is no. I think before I waste any more of your time with this question, I better take it apart and look in the hole more carefully and come up with an exact description of the "sludge", like maybe get some out on a Q-tip and smell it or taste it, or something. While I'm doing that, do you think I should open the valve gap for the exhaust .001 more than the intake? When I checked them that's the way it was so I made them both the same. Later I read that it's ok for the exhaust to be a tiny bit more open.

2008 S40, black, stock, 11,433 miles

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Re: Sludge on top of the piston at 10K
Reply #17 - 11/09/10 at 19:17:22

How about if you just go ahead and run it -- if you have no smoking and are using no oil you have no issue to be chasing.

It is possible for a recently started (just run for a minute) engine to make some condensation moisture (water is a combustion by-product) which would give you your "scraped mud" that you saw.

Run it, if you have any sort of issue it will show itself more clearly later on.

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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Sludge on top of the piston at 10K Reply #18 - 11/09/10 at 19:33:11 Yep, dont sepnd time huntin a booger. If theres a problem, youll find it later.
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Routy Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 2280 Winston Oregon Gender:	Re: Sludge on top of the piston at 10K Reply #19 - 11/10/10 at 05:17:10 Exactly ! Now if the rod that you stick in the hole ever goes down to the crankshaft, then you have a problem !
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bill67 Serious Thumper Offline old tired Posts: 8517 genoa city wisconsin Gender:	Re: Sludge on top of the piston at 10K Reply #20 - 11/10/10 at 05:26:45 I would put Sea Foam in the oil and gas to clean up the piston and engine.
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Re: Sludge on top of the piston at 10K
Reply #21 - 11/10/10 at 05:40:39

Not everything that Bill says is right,...like running an engine w/o oil :'(, but I can't knock the "seafoam"!
Something fixed the carb problem on my 50 hp 4 stroke Merc, and at 8 bucks a can, I'd like to think it was the seafoam.
bill67 wrote on 11/10/10 at 05:26:45:

I would put Sea Foam in the oil and gas to clean up the piston and engine.

Rich
'07 S40 Blvd stocker, except drilled OEM exhaust and white spacer mod...1/2 (.055)

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