What does it mean to Spin a Bearing - or Spun a Bearing? Spin, Span, Spun - whatever...
Thanks -Dave Walton On 10/4/05, Van Cleve <[EMAIL PROTECTED]> wrote: > > > > I pulled the head off and the pistons out yesterday and the sides if the > cylinder walls were totally smooth and polished, NO cross hatch marks at > all, #1 piston had spun a bearing and the crank is a little scratched, > which I think can be repaired. The rod is somewhat discolored about 2'' up > from the big end., which proly means replacement, hopefully I have one the > same weight in my spare parts bin. There is no ridge at the top of the cyl > walls but my plan is to have the block bored for o/s pistons. So far the > valve guides look good but will finish checking them out today. > > Steve > > ntent-Transfer-Encoding: 7bit > From: Peter Frederick <[EMAIL PROTECTED]> > Precedence: list > Subject: Re: [MBZ] Whats this stuff on my 240D > Date: Sun, 2 Oct 2005 10:21:16 -0500 > To: Mercedes mailing list <[EMAIL PROTECTED]> > In-Reply-To: <[EMAIL PROTECTED]> > Reply-To: Mercedes mailing list <[EMAIL PROTECTED]> > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=US-ASCII; format=flowed > MIME-Version: 1.0 (Apple Message framework v553) > Message: 4 > > The vacuum gizmo is the egr controller, you can discard it since you don't > have one. There will also be an EGR valve on the intake manifold. > > The pipe going into the oil pan is the drain from the oil separator in the > air filter housing, all W123 diesels have one. > > Likely the rebuilder put WAY too much clearance on the valve guides, unless > familiar with Benz practice. Easy way to check is to pull the cam and > remove a couple valve springs. If the valve will preceptibly move sidways > when lowered down off the seat, there is too much clearance. > > The other likely problem is way too much piston clearance, and that you can > only check by taking them out. Should be 0.001", very tight. You can > check for wear by pulling the head (as I'm sure you will be doing). > > Unless run out of oil until the engine seized, likely the crank and rods > are fine, they don't cause problems in that engine. Pistons may be shot, > too, if there was excessive clearance, it causes the rings to flex sideways > and extrudes the ring lands. > > Peter > > > > > _______________________________________ > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://striplin.net/mailman/listinfo/mercedes_striplin.net >
