My 94 S350 turbo leaks oil into the intake manifold if I use M-1 5w-40. Switching to 15w-50 essentially fixed the problem. Here is how I diagnosed it:
1) Fill with Mobil-1 5w-40 Truck and SUV. 2) remove the over-the-engine pipe that connects the turbo to the intake manifold. 3) start the car. 4) stand on the drivers side against the front wheel, lean over the engine resting your left hand on the radiator support and pull the throttle cable with your right hand to rev the engine to 2000 - 3000 rpm. You will hear the turbo spin up quickly. Then release the throttle cable. 5) Remove your oil soaked glasses from your face, wipe your oil soaked face with your sleeve, turn off the engine and go inside to take a shower to get the oil out of your hair while ignoring the muted giggling sounds from your wife. 6) switch to 15w-50 and repeat. Hope this helps -Dave Walton 94 S350, 99 E300 On 11/28/05, Nick Gough <[EMAIL PROTECTED]> wrote: > I've just been told by my mechanic that the reason for a loss of oil in the > 300SDL is most likely due to the turbo seal going bad. They explained that > the seal between the 2 halves of the turbo could be leaking oil as there is > some oil around that area of the engine compartment. It seems to be much more > prevalent upon cold starts without the block heater plugged in. Could be that > if the engine is warm, the seals expand and no oil is lost via the tailpipe. > Power seems to also be off some, as well. > > How much for a used (rebuilt turbo)? Or, would just a new seal do the > trick? I think the rebuilt route is the path... if this is the problem. > > Could this also be due to something else in that area of the engine that > could be causing the problem? Could a CCV system be the culprit? (I dunno if > there is even one on the car... never looked... it just never occurred to me.) > > The car has 171k miles on it & now also has new rotors and pads on it. (I > knew it needed pads, but the sensors never made a noise and the light never > came on. I have had no time to do the work myself so I had the shop put on my > pads and they discovered the need for new rotors. They've been on the car for > almost 90k miles, so I guess they were due.) > > Sigh... I was wanting to get some other (cosmetic) things fixed on that > beast. That will now have to wait... if I have to replace the turbo. > > Regards, > > > Nick Gough > 86 300SDL 171k > 93 300E 2.8 122k > 97 Jetta 70k > > > --------------------------------- > Yahoo! Music Unlimited - Access over 1 million songs. Try it free. > _______________________________________ > 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 >
