Rattling tube between intake and oil pan - PeachParts Mercedes-Benz Forum

phidauex · #1 11-14-2005, 11:13 PM

Hi,

After my many-hour saga battling the dreaded OM617.952 starter on my 300TD, I have discovered a small problem.

The drain tube that connects the air filter oil seperator thingy to the oil pan is rattling. It seems to be attached both at the bottom to the oil pan area and at the top to the air cleaner, but not in a very sturdy manner, and it rattles around when idling. I couldn't find any fasteners, so I'm assuming its an O-ring issue of some sort.

Does anyone know how to fix this, and what part numbers I'll need for the o-rings, or grommets or whatever the heck makes this thing sit still? My searching is hampered by my lack of knowledge as to what the thing is officially called. Couldn't find anything on Fastlane that obviously matched..

peace,
sam

MTUpower · #2 11-14-2005, 11:16 PM

Nearly every one in the junk yards I visit are loose, as are nearly all I've seen on running cars. Anyone else have experience with this?

#3 11-14-2005, 11:26 PM

I believe you are referring to the oil separator drain. Check out this thread:

http://www.peachparts.com/shopforum/showthread.php?t=122057

sailor15015 · #4 11-14-2005, 11:41 PM

Mine's loose too. When I take my air cleaner assembly off it'll move around but it doesn't make noise, or maybe it does. Lightbulb! I do get an occasional noise when decelerating from that area. Maybe that's it. I believe its stuck into the pan area, sealed with an o-ring.

dmorrison · #5 11-15-2005, 12:40 AM

Both the top and bottom use Orings to hold the tube and dampen any vibration. The dealer has them.

Dave

#6 11-15-2005, 12:55 AM

There is a clamp that is supposed to hold it in the middle to the bottom of the air filter bracket.

It should be where the tube is running horizontal-ish. A hole for a bolt and then I think it is a nut/bolt clamp that goes through the hole.

They wouldn't just leave that tube unsupported the whole length

Brian Carlton · #7 11-15-2005, 12:56 AM

Quote:

Originally Posted by phidauex

Does anyone know how to fix this, and what part numbers I'll need for the o-rings, or grommets or whatever the heck makes this thing sit still? My searching is hampered by my lack of knowledge as to what the thing is officially called. Couldn't find anything on Fastlane that obviously matched..

On the SD, I recently had the pleasure of securing that tube. The tube has a mounting bracket, half way down, that is bolted to the bracket that supports the turbo. A small hole in the turbo support bracket with a 6mm nut and bolt. It's a PITA to get the bolt on the far side of the bracket but, when properly installed, it holds the tube firmly.

This small nut and bolt would be the first thing forgotten if any mechanic has R & R the manifolds.

#8 11-15-2005, 01:19 AM

Quote:

Originally Posted by Brian Carlton

This small nut and bolt would be the first thing forgotten if any mechanic has R & R the manifolds.

Unless you remove them as a pair and don't have to seperate

GO check out the 300D engine vibration thread...I talked about that nasty rear IP bolt again

phidauex · #9 11-15-2005, 06:13 AM

Ahhh.. A support bracket, you say? I have no such thing on my tube.. Probably lost in some distant episode, and the tube has been relying on the o-rings alone ever since. I'll see what I can cobble together down there!

Thanks,
Sam

boneheaddoctor · #10 11-15-2005, 07:45 AM

TH esupport bracket for that drain tube attaches on the bracket that extends from the exhaust manifold to the rear top bolt on the pass side engine mount pedistal. It attaches to that that bracket on the engine side of it with a 10mm bolt and nut, very difficult to see or reach.

Brian Carlton · #11 11-15-2005, 07:54 AM

Quote:

Originally Posted by boneheaddoctor

It attaches to that that bracket on the engine side of it with a 10mm bolt and nut, very difficult to see or reach.

This one attaches to that bracket on the opposite side from the engine. The tube is on the passenger side and I don't think it's possible to secure the tube to the engine side.

AFAIK, the nut and bolt was far smaller than 10mm. The socket used for the bolt might have been 10mm.

Brian Carlton · #12 11-15-2005, 07:57 AM

Quote:

Originally Posted by Brandon314159

Unless you remove them as a pair and don't have to seperate

GO check out the 300D engine vibration thread...I talked about that nasty rear IP bolt again

How can you remove them as a pair? They must come completely off the bracket to remove the bracket from the tube.

I don't want to speak about that nasty bolt ever again. I'm way over it. Two hours of my life that I'll never get back. Hell, it took me 20 minutes to even find the damn bolt head.

boneheaddoctor · #13 11-15-2005, 07:59 AM

Quote:

Originally Posted by Brian Carlton

This one attaches to that bracket on the opposite side from the engine. The tube is on the passenger side and I don't think it's possible to secure the tube to the engine side.

AFAIK, the nut and bolt was far smaller than 10mm. The socket used for the bolt might have been 10mm.

I just did mine last week....after thinking about it it is more like a 8mm..but it did atach to the block side of the bottom exhaust suport bracket...I know becasue it was such a SOB to get of and put back on so I remember it well.

Brian Carlton · #14 11-15-2005, 08:05 AM

Quote:

Originally Posted by boneheaddoctor

I just did mine last week....after thinking about it it is more like a 8mm..but it did atach to the block side of the bottom exhaust suport bracket...I know becasue it was such a SOB to get of and put back on so I remember it well.

I can't fathom how it would attach to the block side. The bracket from the turbo is closer to the block than the point at which the tube enters the oil pan. So, it seems that the tube rises from the oil pan, is bolted to the passenger side of the support bracket and then continues upward, and slightly toward the passenger side, up to the air cleaner.

If the tube was bolted to the driver's side of the support bracket, how would it get around the bracket and out toward the air cleaner?

Maybe I need to get a photo.

boneheaddoctor · #15 11-15-2005, 08:08 AM

Quote:

Originally Posted by Brian Carlton

I can't fathom how it would attach to the block side. The bracket from the turbo is closer to the block than the point at which the tube enters the oil pan. So, it seems that the tube rises from the oil pan, is bolted to the passenger side of the support bracket and then continues upward, and slightly toward the passenger side, up to the air cleaner.

If the tube was bolted to the driver's side of the support bracket, how would it get around the bracket and out toward the air cleaner?

Maybe I need to get a photo.

the bracket is a flattened Z shape....back side is actually in line with where it needs to be,,,besides the tab thats welded to the drain tube demands it be bolted to the block side of that bracket...not the outboard side. I could barely get to it with my fingers so there is no chance at all of me photographing it....my 300SD has no oil seperator and therefore no drain tube...but my W123 does....no way was I going to leave something like that off...regardless of how many scrapes I got trying to put it back on..