Date: Thu, 23 Mar 2000 10:16:21 -0800 From: "wgmoore" <wmoorenopsamcrest.net> Subject: Re: How to tell if engine has been rebuilt?
your right abut syn oil, we use it on the rental fleet of boats here and after 20 years of rentals, I finally started rebuilding them- back to the question- you will need to measure the cyl bore, then get a rod or main bearing and it will be stamped what size it is. Look the head gasket over- some mechanics would put them together with wet paint as a sealer, some would put sealer round the metal crimp rings on the headgasket that passed oil to the top end.the factory didn't. Long mileage engine have a strong smell to them where the soot of combustion seeps into the threads of some fasteners like main bearing bolts and head bolts. It can also have a white ashe mixed in with it. Ck the pan (trans) for old cork and (ugh) silicone sealer. look at what is stuck to the screen of the oil pick up. How deep a groove is worn in the drive chain tensioner( I know it's on the trans) but you will want to change out that seal anyway. After you take all the evidence, and compare the worn parts with those newer parts, you can decide if it is original or not. "Tom Reed" <treednopsamux.csustan.edu> wrote in message news:Pine.SOL.4.02.10003221907360.10992-100000nopsamux.csustan.edu... > Hi all, > > I finally got around to pulling the head on my '85 900T yesterday, and > find that the lower portion of the engine shows no signs of wear. The > odometer reads 300,370. The question is can this engine really have that > many miles on it? How can I tell if someone's rebuilt the engine before I > owned the car? > > The pistons are not stamped "oversize" as I understand they would be in an > American make, but, then again, they are not stamped "standard" either. > I'm sure one of you Saab experts must know how to figure this one out. If > it does turn out to never have been rebuilt, it's a real testament to > synthetic oil (I use AmsOil, and I think the previous owner used Castrol > Syntech). > > > Tom R. treednopsamux.csustan.edu > > "Long life to this tree, and may it prosper from this auspicious day. > It's name shall be Albert." > --Alice Liddell (March 10, 1863) >