W126 OM617 1985 300SD turbo drain tube gasket & seals - PeachParts Mercedes-Benz Forum

whunter · #1 01-16-2005, 10:32 PM

A very good DIY is here
turbo oil drain question

My contribution is the following pictures.
This job is not to bad.

whunter · #2 01-16-2005, 10:33 PM

More pictures 1.

whunter · #3 01-16-2005, 10:34 PM

More pictures 2.

85drtysthbenz · #4 01-16-2005, 10:44 PM

thanks for the pics....that should help me out a great deal...im not dreading this so much anymore

Greg300sd · #5 01-16-2005, 11:07 PM

Hi. Did this job on my 83 300SD....not too bad. I was quite befuddled after doing the job since I still had a leak and thought I must have skipped over something. Much to my surprise the lower portion of the oil return tube that I ordered came with a leak free of charge!

...So..if you are by chance replacing the lower tube check it by applying air pressure while under water for example. I had to remove the first "new" tube and buy a second one.

The other issue if not already mentioned is that you would want to drop the lower oil pan since you may have to dig out the grommet that sits on top of the lower oil pan. Bits of it will drop into the oil pan guaranteed if you have to use a pick to get it out. Good luck!!

ascalise · #6 01-17-2005, 12:49 AM

I replaced these on my 81 SD about a month ago and they leak just as bad as they did before. Any ideas?

Pete Burton · #7 01-17-2005, 08:46 AM

Quote:

Originally Posted by ascalise

I replaced these on my 81 SD about a month ago and they leak just as bad as they did before. Any ideas?

I did this job on my SD back in 97 or so and it never sealed completely either. Did you drop the lower oil pan and inspect the grommet hole thoroughly to see if it was completely cleaned out? Do you have a fair amount of blowby on your engine? I think this was my problem. Also, I removed my tube without removing the pan, but it was such a bit** that I should have just taken the pan off, it would have been easier.

When I rebuilt my engine last year, it was much easier. All the parts were clean and easy to reach on that engine stand. I didn't even spill my beer

I cleaned everything with rubbing alcohol first, and added a thin film of black RTV around the grommet. It's so leak free now I'm worried about rust.

ascalise · #8 01-18-2005, 10:56 PM

I did take off the pan to replace the gasket on that. Yes my engine does have quite a bit of blowby. At least more than i would think an engine should have. However, I've been told that this is normal on these engines.

Pete Burton · #9 01-19-2005, 08:23 AM

The blowby and normal diesel vibration drive oil to leak at that tube. New seals will help, but with the tube coated with draining oil and a lot of crankcase pressure, it's still gonna seep. How many miles on your engine, what type? You can add that info to your signature

junqueyardjim · #10 12-18-2005, 03:25 PM

I have been studying this since my nice 300 D Turbo developed this awful oil leak so fast this fall. I bought this car on Ebay in April, and the first two oil changes it used no oil and let just an occasional drop fall from the back of the engine. Then all of a sudden it developes this awful leak on the passenger side toward the front of the engine. I spent time checking it out yesterday and it seems to be the lower turbo seal drain. In ten minutes of idle time it left a spot as big as a dinner plate and looked a mile deep. It is due for an oil change also, but it took two quarts to bring it up to normal, and that is mostly in the last 1000 miles of driving. Any explanation as to why this rather unusual tube and seal should go from good to very bad in such short order. Fortunately my Buddy, Bajaman, with his hard working but delicate hands said he could/would help me with this problem. It just doesn't look like a good job for my size 13 hands. Also, I added the oil, it's cheap and instead of bringing it to my guy for an oil change I think I will do it myself and pull the small pan at the same time. I think it would be a good time to replace the "O" ring in the aircleaner tube and maybe give that valve in there a good shot of starting fluid to clean it up.

theshadyguy · #11 06-03-2008, 05:02 PM

So I changed the Air Cleaner Mount Bracket, Mounts, and added heat shields so that my turbo would not vibrate so much. While the housing was off, I noticed that the underside had a little cup with a hole cut in it and some fuel tube poking out of it. My charger still vibrates enough to shake off the U-boot after about 20 minutes of driving, though it's not as bad as it was before I replaced the broken bracket. I have an 81300SD Turbo and have replaced the engine mounts and engine shocks before I replaced the bracket. Do I need to go to the junkyard and get a new housing???

fdanielson · #12 08-11-2008, 04:05 PM

For those of you who are looking for the o-ring that goes on the oil drain tube from the air cleaner to the block the part number is 0069972645. If you search on that number in Fastlane you'll see it's the same one used on the oil dipstick.

skaa · #13 10-18-2009, 12:24 AM

Turbo Drain Gasket Replacement

I just finished replacing my lower rubber gasket that sits on top of the oil pan. What a PITA!! So brittle, I couldn't pull the attached pipe up and out. I had to drain the oil and drop the oil pan to get to it. Then, a 5mm allen head bolt stripped as I was unscrewing it from the pan. Two hours to figure out how to remove it. Finally, I just drilled it till the head torqued off. Now, I have to replace the bolt, but no biggie, there's about 20 other good ones holding the pan in place. The $2.10 turbo drain rubber part I replaced no longer leaks, nor does the oil pan gasket leak, but on the way home from the garage, I noticed my oil pressure was dropping. I got home and checked the oil level, and it's full, and no leaks, either. What's up? I suspect a filter or a screen is clogged? Which one? I don't want to damage my engine. It's got over 425k lovely miles, and is my grocery getter. Any thoughts?

Skaa 1982 300SD 426k miles and counting

bmor_62 · #14 09-02-2013, 11:53 AM

I have tried the hi temp silicone treatment twice so far and still have some leakage. There is an area where it's hard to get a finger at on top of the oil pan. When this rain shower subsides I will try again. If that fails I will get the parts and try the gears method.

bmor_62 · #15 09-03-2013, 10:45 PM

Well I put a 2nd coating of silicone over the drain and it still leaks. I should have tried to peel off the 1st coat entirely and then prepped the area with isopropyl alcohol. That is how I will proceed with the 3rd attempt. Onward!