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Old 03-06-2015, 18:00   #31
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Re: Perkins 4236 blue smoke

Believe it or not but in the Pratt & Whitney manual for the R-1340 engine it has introducing Bon-Ami powder into the induction system when the engine is running as a way to deal with excessive oil consumption. Theory is of course for engines whose rings have not seated, the scouring of the cylinder walls will help the rings seat. Now a 1340 is I believe from the 1920's and I would never do this on a modern engine, but this scouring powder into the intake was actually done, it's not just a myth.



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Old 03-06-2015, 18:18   #32
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Re: Perkins 4236 blue smoke

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Originally Posted by a64pilot View Post
Believe it or not but in the Pratt & Whitney manual for the R-1340 engine it has introducing Bon-Ami powder into the induction system when the engine is running as a way to deal with excessive oil consumption. Theory is of course for engines whose rings have not seated, the scouring of the cylinder walls will help the rings seat. Now a 1340 is I believe from the 1920's and I would never do this on a modern engine, but this scouring powder into the intake was actually done, it's not just a myth.



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