Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #16  
Old 02-13-2014, 08:52 AM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 51,835
Quote:
Originally Posted by iceman104 View Post
Help. I have a 85 300sd. And when I bought it I didn't relise many oil leaks at all really. A few not a. Lot or large amounts because alot of gaske been replaced. But now the air filter breather box is leaking oil out of the bottom of it. Is this a blow by issue? Do I need new rings. Could a valve adjustment help? Its leaking a faily large amout. Thanks in advance to all who can help.

If your Air Filter Housing is similar to the 300D Air filter Housings there is a nipple on the bottom rear of the Housing that has an O-ring on it. There is a Drain Tube that goes over that nipple and that Tube passes between and below the Manifolds and behind a Bracket a Bracket that us under the Turbo and Manifolds.

The Air Filter Breather Drain ends at another Nipple with O-ring behind the Turbo Charger Drain.

What happens is there is a single Bolt or stud that holds that drain to the mentioned Bracket and that Bolt gets loose or the welded on piece of metal or Clamp on the Breather Drain Tube breaks off. Without the Tube well attached if does not say on the Nipples.

Along with the above if the Breather itself is plugged or the Breather Drain Tubing and that one way Breather Valve in the Crankcase is not opening it would fill with Oil.

Look in the DIY Repair Links there is a bunch of info on blow-by.
DIY Repair Links
http://www.peachparts.com/shopforum/forumdisplay.php?f=82
http://www.peachparts.com/Wikka/DoItYourSelf

A Valve Adjustment may or may not help but should be done anyway if it is overdue. Late Valve Timing due to Timing Chain Stretch does not help either and the same for late Fuel Injection Pump Timing.

But, the main 2 places Blow-by can come from is past the Piston and Cylinder walls and around the Valve Stems of the Exhaust Valves.

I don't know for sure if this is possible but I think if the Seal on the Exhaust side of the Turbo is no good it is possible for Exhaust Gasses go get past that seal.

Also in the Repair Links there is soaking the Cylinders in something like Marvel Mystery Oil to free up sticking Piston Rings or switching to Synthetic Oil and Driving a few 100 Miles; people claim that also frees up sticking Piston Rings. But, that only works if your Rungs are sticking.

__________________
84 300D, 82 Volvo 244Gl Diesel
Reply With Quote
  #17  
Old 02-13-2014, 04:42 PM
Registered User
 
Join Date: Dec 2009
Location: Bedfordshire UK
Posts: 534
Gummed up rings from WVO causing blowby , below is a cure
Wall paper stripper steam cleaning

A search on the above forum will find lots of information about steam injection cleaning gummed rings.

There is a thread titled ' water injection has cured my blowby 'but when I try to currently access it I get forum is down for maintenance.One thread (possibly the one I cannot access) mentions monitoring blowby with a pressure guage on the dipstick tube and how the pressure drops and by how much and how quick as the water injection is carried out over the course of some driving with the water being sprayed into engine (not steam this time but just a fine mist of water).

But it works and will save most engines and then after say a month or so of veg use then run it again to keep it clean.

Last edited by Murkybenz; 02-13-2014 at 05:07 PM.
Reply With Quote
  #18  
Old 02-16-2014, 06:02 PM
Registered User
 
Join Date: Jan 2014
Posts: 44
The oil leak seems to be worse when starting up. There is a small hole in the passenger side breather box on the bottom. It looks factory like just to drain anything that would get in it. Its dripping oil strait down. The only way I know it could get in there is from the blow by tube from top of engine to breather box. Is this normal. Anything I can do to fix or slow it down ?
Reply With Quote
  #19  
Old 02-19-2014, 02:06 AM
Registered User
 
Join Date: Jan 2014
Posts: 44
Diesel911 thanks for your help. But idk where to find this drain tube. Where does it lead to the oil pan? And what is a good way to clean it?

Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 07:17 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page