We "dusted" freshly rebuilt diesel engines with 'Bon-Ami' when I was a
Service Engineer with Caterpillar back in the 60's ( before the lawyers
limited our creativity).
(NOTE: The factory did not "approve" of this technique) -- but it worked
like a charm when the rings were as hard as the cylinder liners and the rings
would not seat. Use a VERY small amount of Bon Ami, let the engine settle in
and smooth out and then drizzle about a cup of water down the carbs to help
"steam out" any residual Bon Ami. Change the filter and oil and
drive on ...
Pete Koernig
'70 1600 (# 29429) almost done
'69 2000 'lot of work left and running out of $$
----- Original Message -----
From: jerry thompson
To: datsun-roadsters@autox.team.net
Sent: Saturday, April 24, 2004 2:54 PM
Subject: Re: re built engine break in suggestions
I have a service bulletin from the head chiefs at GM telling the service
departments to do the BonAmi / Boraxo trick with the new 1955 Chevrolets
with the V8. It states this may solve the oil consumption problem they are
having due to the rings not seating correctly. They are to do this first
before replacing the engine. I'm sure GM didnt want to have to replace all
those V8's.
> An English guy I worked with had an interesting technique for when the
hard,
> chrome rings in the Jag he'd just overhauled wouldn't seat: he'd set the
> throttle between 2500 and 3000 RPM's, then carefully sprinkle Bon Ami
> cleanser (!) into the carb throats. It was amazing to see the smoke
stop
> and hear the engine smooth out and run a bit faster, when the rings honed
> themselves in.
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