Kaleb, MB diesels are designed to run a very tight piston fit, less than 0.002".? You would be hard pressed to feel, let alone see, 0.002" movement.? Overheating, or very high mileage would be the likely causes of piston slop.? I think you should replace the engine with your spare.
Cracks between the valve seats are quite common and usually do not leak water.? A sign that water was?leaking into?a cylinder would be a steam cleaned look. Jim in Phoenix -----Original Message----- From: Kaleb C. Striplin <[EMAIL PROTECTED]> To: mercedes Mailing List <mercedes@okiebenz.com> Sent: Sun, 6 Apr 2008 3:55 pm Subject: [MBZ] loose 300SDL pistons So I have this 300SDL I picked up a while back. The guy who had it bought it from a list member from another list. Drove it back somewhere in the NE back to OK. Anyway, he says IIRC after a while of driving he couldnt keep oil in it. Not sure where it was going but thats what he said. It broke down and he had ot have it towed back to OK. Took it to a local shop and I know they ran a compression test on it but Im not sure what the numbers where. They pulled the head and I think they said it was warped. They also said the engine needs to be rebuilt because you could move one of the pistons back and forth in its bore. The head is sitting on the engine but not installed. Today I looked at it for a minute and the head does have a couple of cracks between a couple of cylinders valves. #1 piston is at TDC and I can move it back and forth very slightly. I cant tell you how much but its a little loose. #6 is also at TDC or close to it, and I can move it a little but its quite a bit tighter than #1. The others I cant move, they are down in their bore. So the question is, should this piston be able to be moved at all? Given this info and what the PO says happened, would I be better off just yanking the engine and dropping in another? That is what I am leaning towards. -- Kaleb C. Striplin/Claremore, OK 94 E420, 92 300SD, 92 300D, 92 250D Turbo, 92 300E 4Matic, 91 300D, 90 420SEL, 89 560SEL, 89 260E, 87 300SDL, 85 380SE 5.0 Euro, 84 190D, 84 300D euro manny, 81 240D, 81 380SLC, 80 240D, 76 240D, 76 300D, 72 250C, 69 250 http://www.okiebenz.com _______________________________________ http://www.okiebenz.com 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://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com 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://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
