Subject: Re: The Big Bang!!
Author: Martin Cooke
Date: Sep 12, 2002, 7:40 AM
Post ID: 1710996436
you can inspect the big end bearings in situ by removing the sump pan &
undoing the bearing end caps. MAKE SURE YOU KNOW WHICH WAY THEY GO BACK!
bearings are "white metal" type shells. these should be smooth with no signs
of scoring. there will almost certainly be bits of steel (black specks)
embedded in the shells as there is no oil filter. this is normal.
if the shells are scored then the big end journal will be toast too. must be
smooth & not worn undersize. you can just get a micrometer in to measure
journal i think.
sludge trap is the large drilling central to the big end journal, accessed
via plug at front (it feeds the oilways you'll see in the journal itself
that lubricates the bearing). crank must be removed to do this. it WILL be
full of hardened crap unless it's been cleaned recently.
sorry to say it, but i think the engine will have to come out & be rebuilt
properly.
if you re grind the crank bearing to fit new undersize shells, make sure the
engineer who does it understands the importance of radiusing the bearing
ends in accordance with guzzi specs. or buy a new crank.
cookie
----- Original Message -----
From: "Keith Ruff" <klru-@fcc.net>
To: <Loopfram-@topica.com>
Sent: Thursday, September 12, 2002 2:22 PM
Subject: RE: The Big Bang!!
| Bottom end has never been apart, bike sat for a long time, so maybe there is sludge. I'll pull the oil pan and check things out. What should I look for? How do you know if the bearings are bad? I just looked in the Chilton manual I have (it's an old early 70's vintage book) and I can't tell what the bearings look like, unless they are the "shells" they speak about, or do these shells go around the bearing? How do you get the bearings out? Are we talking total engine disassembly here or can this be done working from under the bike with the oil pan off? I do see in the book the little oil holes on the arms, is that the ones that can clog and starve the bearings of oil? If they are clogged how can they be unplugged while in the motor, or again, does this require engine disassembly? Anybody up for a road trip to NJ??????????? Keith Fred Sahms wrote:
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