Maybe I'm young and stupid...maybe just stupid...maybe just young.
The chap who taught me to build engines gave me the lesson in two
phases...are you building this engine for the street or building the engine
for racing.
his street method seemed to be similar to every book/instruction I've ever
read...
But like most of what I've read today...his break in procedure for race
motors was completely the opposite.
Generous lube on the cam, tappets and bearings, but on the pistons and
bores, just a VERY light coating of oil (dip your finger in it and rub your
finger around the bore and skirt). Start up and run 3K for 2-4 minutes and
shut it down...After that,l hit the track and put a session on it - re
torque the head and enjoy. I've built 3 motors that way and I've never had
ring problems. He'd built more motors than I care to think about so I took
his advice and ran with it.
aaron
>From: "Jack W. Drews" <vinttr4@geneseo.net>
>Reply-To: "Jack W. Drews" <vinttr4@geneseo.net>
>To: FOT@autox.team.net
>Subject: breakin
>Date: Tue, 10 Feb 2004 12:02:13 -0600
>
>A couple of years ago I installed Total Seal rings in my engine and just
>couldn't get them to seal at all. Turned out that it wasn't the rings'
>fault, but rather the surface of the sleeves had a poor finish.
>
>In the process of solving this problem, I talked to a motorcycle guy who
>said that BMW motorcycles had this problem a couple of years ago, and when
>he went to the BMW school they taught them their recommended startup
>procedure to prevent this problem.
>
>This procedure is to install the pistons in the cylinders with virtually no
>oil on the walls and no oil on the rings. Just put one dab of oil on each
>skirt. Then, upon startup, run the engiene 2500 - 3000 for two to three
>minutes -- just what cam manufacturers recommend anyway.
>
>I tried that on my own engine with great trepidation (I've been looking for
>a chance to use that big word) and it worked fine. Since then I've built a
>half dozen engines using that procedure and everything is cool. There has
>been no evidence of early ring wear, either.
>
>uncle jack
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