Damage from overheat does not always result in scored pistons. However, if the temp rise is large enough it may heat the pistons to the point the camber is taken out of them. Pistons have an "egg shape" at the skirt area to stop piston "slap" as it goes up and down. If the heat rise was enough it may have deformed the skirt wall "egg" enough to make piston slap become part of the engine noise set.
It may happen before the rings become hot enough to lose spring tension that holds them out against the cylinder wall, thus start/run/power is "relatively unaffected". In fact, as mentioned, start may happen faster because of loss of friction the starter spins "relatively faster" .... Just a thought. Was not there, bring the car closer to the computer so I can listen to it run.. ;))) Grant... Had it happen once when freeze plug blew out after fresh overhaul... oops. On Tue, Dec 25, 2012 at 2:13 PM, Curt Raymond <curtlud...@yahoo.com> wrote: > If I had scored pistons wouldn't the engine start harder because of > lowered compression? > If anything it starts EASIER now. Car-part does have some $600-$700 > engines, I was considering a newer, higher performance engine, didn't they > change in '83 to have more power? I could at least get one with new type > pencil plugs. I've got pencil plugs in this one but I'm not sure the > retrofit type are as good as an engine designed for pencil plugs. Last I > tried this car wouldn't start below about 15F although as easy as it > started the last two days things may have changed... > > -Curt > > Date: Mon, 24 Dec 2012 14:34:53 -0600 > From: Dieselhead <126die...@gmail.com> > To: Mercedes Discussion List <mercedes@okiebenz.com> > Subject: Re: [MBZ] Uh oh... > Message-ID: <a062408b5ccfe6c0fc2d7@[192.168.1.51]> > Content-Type: text/plain; charset="us-ascii" ; format="flowed" > > >The block heater was just for insurance, there was some anti-freeze > >in the system and it wasn't all that cold. I didn't want to wait up > >for the car to cool off, I was beat after our adventure. > > > >I'm assuming that the lack of power and the valve clatter are both > >signs of a failed headgasket... > > > >-Curt > > I'm not sure that is a good explanation, but I don't have a good > alternate one. Scored cylinders (melted pistons) from overheating > is the best explanation I have. > > Car-part.com look for a good engine? Still probably $1200 or more > $600 for engine and $600 for swap. (unless you DIY, but that is not > practical when the flakes are flying and you are not in collyfunkia) > > > _______________________________________ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
