Pull the motor--that ain't no lumbering V8 you're messing with. Replacing
bearings without yanking the crank is fine when you're doing it as a
preventative measure i.e. every third race or so, as a matter of course,
with no nasty news when you look at the bearings. But if you've got a
problem you've got to solve it before it gets really expensive. You've
probably got an oval big end on your rod, and those bits of babbit went
somewhere.
-----Original Message-----
From: WEmery7451@aol.com [mailto:WEmery7451@aol.com]
Sent: Tuesday, May 09, 2000 7:26 AM
To: LANG@isis.mit.edu; fot@Autox.Team.Net
Subject: Re: Khartu's First Outing
In a message dated 5/8/00 2:37:23 PM Pacific Daylight Time,
LANG@isis.mit.edu
writes:
<< But the real reason I'm posting this to this list is that I'm looking for
input/feedback on bearing failure... in my case, the "babbiting" was
"mashed" down to the steel shell on the piston side of the rod. There's a
little "scuffing" on the contact area of the rod journal at/near the TDC
point for that cylinder.
>>
Unfortunately Bob, the safer method is to pull the engine and do all the
normal checks on the crank -- being certain that the oil passages are not
plugged. Many years ago, I had a similar experience and decided to assume
the risk of just replacing the bearing. The next time out, the engine got
blown to bits.
The bare minimum is to replace the rod, which may have become distorted. We
will have to see what the more successful racers say.
|