So, now I am just about to break in my rebuilt engine. Just had the
crank turned and nitrited, new forget pistons, deck blocked, etc. Hope
to start it this weekend. My normal [normal, this is the second time in
my life and last in two years] process would be to squirt a little oil
in each cylinder before I put the head on, thoroughly lube the cam, put
the head on, fill the engine with oil through the tappet holes, spin the
oil pump drive gear manually to put oil everywhere, install the dizzy,
open my preprimed accusump, start the motor and run for 20-30 minutes at
between 2 and 3000 RPM.
Given what you wrote below, is the only step I should skip the
pre-oiling of the cylinder walls?
Thanks,
Chuck
-----Original Message-----
From: owner-fot@autox.team.net [mailto:owner-fot@autox.team.net] On
Behalf Of Jack W. Drews
Sent: Tuesday, February 10, 2004 10:02 AM
To: FOT@autox.team.net
Subject: breakin
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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