I'd just replace the pump and hope for the best. The pump is just a relatively small flange with the impeller on the inside and the pulley on the outside, Inside the flange is the bearing and the seal. There is weep hole on the bottom to let coolant out in case the seal starts to leak. These things weren't too expensive in the past but I haven't bought one in years. Here's a video that shows the pump: http://www.youtube.com/watch?v=Sk9je3Xe6ig
The 617 is a pretty tough engine and it may still be serviceable. Having said that, overheating and zero oil are two of the things that can wreck them. Still, I'd put water in it, warm it up, and run a compression test before throwing in the towel. Pistons/rings, cylinder bores, and valves are the most likely to show damage and a compression test should reveal potential problems pretty fast. -----Original Message----- From: mercedes-boun...@okiebenz.com [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Rich Thomas Sent: Monday, July 09, 2012 12:06 PM To: Mercedes Discussion List Subject: [MBZ] 300SD Morning Scare So this morning mama rings me a 4:26AM (don't ask) and in fumbling for the phone I did not get the call. Try to call her like 6 times, then a voice mail pops up, she says the car is dead, was smoking bad, would not start again after stopping. Anyway I finally reach her, she has called AAA to get a free tow back to the house, says some guy (at 4:30AM...) saw a puddle of oil under the car. Ohsh*t. So anyway after awhile a flat bed arrives with her and the car, she goes on her way. I checked the oil, it was fine. Car then started right up and ran OK. hmmmm. So then I check coolant and it is completely dry. Ohsh*t. I filled it back up and see it leaking out the front of the engine, I guess it is coming from the water pump which must have munched. Looks like the water pump is in some sort of aluminum housing with a little banjo bolt/line coming out of it then going to the block just above. Anyone know what all that is about? I am figuring the car did overheat and the "smoke" was steam blowing out, but maybe she was lucky and caught it (or by circumstances was caught) before the engine got damaged. Given it started and ran fine, I am hoping.... --R _______________________________________ 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
