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 > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-24-2017, 08:18 PM
mbzr4ever's Avatar
Registered Wahine
 
Join Date: Apr 2004
Posts: 614
Did the FEBI diaphragm fail... or did I?

Four years ago, I replaced my vacuum diaphragm with a FEBI brand for my 79 240D.

Having problems with no vacuum, so I checked the diaphragm and sure enough, it is ripped.

Is 4 years about right for the life of this rubber item?

I am also wondering if I placed the 2 metal discs the wrong way - they have a curved side vs a flat side.

Attached Thumbnails
Did the FEBI diaphragm fail... or did I?-2145.jpg  
__________________
1991 300E 124.030 103.983KE 722358 03 412178
207K

1979 240D 123.123 250K (Project car)

2000 Ford Ranger, 187K

2015 Dodge Ram 1500 EcoDiesel 37K

Last edited by mbzr4ever; 09-24-2017 at 09:16 PM.
Reply With Quote
  #2  
Old 09-24-2017, 08:32 PM
Registered User
 
Join Date: Jan 2006
Location: Tucson, AZ
Posts: 4,718
****If by "curved" you mean a rim or a lip then the "flat" side goes against the diaphragm and the lip goes away.***

Ignore this. I'm dealing with a case of the flu and my brain is foggy. Your alignment is correct.

Four years seems to be a short time but a ton of variables can be present. Type, condition, contamination (chemical and metal particles) of the oil can cause premature wear.

I am guessing you are referring to your OM616 powered 240D's vacuum pump?
__________________
“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now

Last edited by Mike D; 09-24-2017 at 10:18 PM.
Reply With Quote
  #3  
Old 09-24-2017, 09:11 PM
mbzr4ever's Avatar
Registered Wahine
 
Join Date: Apr 2004
Posts: 614
Yes, sorry - this is supposed to go in the diesel discussion...

Original thread where I changed the vacuum diaphragm: Is my 204D ready to blow?

Don't know if I can move this or if a mod has to do it.
__________________
1991 300E 124.030 103.983KE 722358 03 412178
207K

1979 240D 123.123 250K (Project car)

2000 Ford Ranger, 187K

2015 Dodge Ram 1500 EcoDiesel 37K

Last edited by mbzr4ever; 09-24-2017 at 09:35 PM.
Reply With Quote
  #4  
Old 09-24-2017, 09:14 PM
Diseasel300's Avatar
Registered User
 
Join Date: May 2016
Location: Texas Hill Country
Posts: 5,190
What kind of shape is the rollercoaster cam in? What about the thrust bearing behind it? Linkage/bearing condition? If worn, they can take out the vacuum pump.
__________________
'11 Honda Accord EX - "The Daily" 70K
'83 500SL Euro - "The Money Pit" 116K
'91 350SD - "Diseasel Jr." 173K
'94 BMW 525i - "The Red Car" 180k
Reply With Quote
  #5  
Old 09-24-2017, 09:15 PM
Registered User
 
Join Date: Jan 2006
Location: Tucson, AZ
Posts: 4,718
Nah, the "Tech" forum is fine.

I notice you refer to yourself as a "Registered Wahine", are ya from the Islands?
__________________
“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now
Reply With Quote
  #6  
Old 09-24-2017, 09:19 PM
mbzr4ever's Avatar
Registered Wahine
 
Join Date: Apr 2004
Posts: 614
Quote:
Originally Posted by Diseasel300 View Post
What kind of shape is the rollercoaster cam in? What about the thrust bearing behind it? Linkage/bearing condition? If worn, they can take out the vacuum pump.
Rollercoaster cam?
Is that the rod I attach the diaphragm on with the hex screw?

EDIT: researching VACUUM PUMP FAILURE! Are you neglecting yours??
__________________
1991 300E 124.030 103.983KE 722358 03 412178
207K

1979 240D 123.123 250K (Project car)

2000 Ford Ranger, 187K

2015 Dodge Ram 1500 EcoDiesel 37K

Last edited by mbzr4ever; 09-24-2017 at 09:39 PM.
Reply With Quote
  #7  
Old 09-24-2017, 09:21 PM
mbzr4ever's Avatar
Registered Wahine
 
Join Date: Apr 2004
Posts: 614
Talking

Quote:
Originally Posted by Mike D View Post
Nah, the "Tech" forum is fine.

I notice you refer to yourself as a "Registered Wahine", are ya from the Islands?
OK, well between working on the 300E and the 240D, I am jumping back and forth and getting a master's degree in tinkering.

Yes, hanging my hat here on the Big Island atm.
__________________
1991 300E 124.030 103.983KE 722358 03 412178
207K

1979 240D 123.123 250K (Project car)

2000 Ford Ranger, 187K

2015 Dodge Ram 1500 EcoDiesel 37K
Reply With Quote
  #8  
Old 09-24-2017, 09:32 PM
mbzr4ever's Avatar
Registered Wahine
 
Join Date: Apr 2004
Posts: 614
Quote:
Originally Posted by Mike D View Post
If by "curved" you mean a rim or a lip then the "flat" side goes against the diaphragm and the lip goes away.
In the photo in the first post, the curved surface is next to the diaphragm and the flat surface was facing away.
__________________
1991 300E 124.030 103.983KE 722358 03 412178
207K

1979 240D 123.123 250K (Project car)

2000 Ford Ranger, 187K

2015 Dodge Ram 1500 EcoDiesel 37K
Reply With Quote
  #9  
Old 09-24-2017, 09:39 PM
Diseasel300's Avatar
Registered User
 
Join Date: May 2016
Location: Texas Hill Country
Posts: 5,190
The rollercoaster cam is the part inside the engine that operates the mechanism in the vacuum pump. If you peek in the hole that the vac pump attaches to, you'll see it on the sprocket that drives the injection pump.
__________________
'11 Honda Accord EX - "The Daily" 70K
'83 500SL Euro - "The Money Pit" 116K
'91 350SD - "Diseasel Jr." 173K
'94 BMW 525i - "The Red Car" 180k
Reply With Quote
  #10  
Old 09-24-2017, 11:05 PM
Registered User
 
Join Date: Sep 2001
Posts: 969
The discs must be positioned properly as explained and the rod must be fully extended forward when the cover is tightened.

Good luck!!!
__________________
Does a Caddy stretch? No, but a Mercedes bendz.
Reply With Quote
  #11  
Old 09-25-2017, 12:54 AM
mbzr4ever's Avatar
Registered Wahine
 
Join Date: Apr 2004
Posts: 614
Quote:
Originally Posted by Diseasel300 View Post
The rollercoaster cam is the part inside the engine that operates the mechanism in the vacuum pump. If you peek in the hole that the vac pump attaches to, you'll see it on the sprocket that drives the injection pump.
Tomorrow I will have to take off the pump to get inside:

https://www.youtube.com/watch?v=obCFLey6obo
__________________
1991 300E 124.030 103.983KE 722358 03 412178
207K

1979 240D 123.123 250K (Project car)

2000 Ford Ranger, 187K

2015 Dodge Ram 1500 EcoDiesel 37K
Reply With Quote
  #12  
Old 09-25-2017, 10:40 PM
mbzr4ever's Avatar
Registered Wahine
 
Join Date: Apr 2004
Posts: 614
Can't do it.
Can't take the pump off to see inside.

More than one hex bolt is getting stripped....
I guess I'm just gonna have to keep some spare diaphragms and see how long they last.
__________________
1991 300E 124.030 103.983KE 722358 03 412178
207K

1979 240D 123.123 250K (Project car)

2000 Ford Ranger, 187K

2015 Dodge Ram 1500 EcoDiesel 37K
Reply With Quote
  #13  
Old 09-30-2017, 06:19 PM
mbzr4ever's Avatar
Registered Wahine
 
Join Date: Apr 2004
Posts: 614
Very helpful thread - was here also a few years ago...

Vacuum pump diaphragm replacement pix

EDIT: Looks like I had installed the discs incorrectly - the larger one should be closer to the engine.

This is probably why the diaphragm failed so quickly.

We shall see - have a spare diaphragm handy just in case.
__________________
1991 300E 124.030 103.983KE 722358 03 412178
207K

1979 240D 123.123 250K (Project car)

2000 Ford Ranger, 187K

2015 Dodge Ram 1500 EcoDiesel 37K

Last edited by mbzr4ever; 09-30-2017 at 09:17 PM.
Reply With Quote
  #14  
Old 07-23-2018, 07:27 PM
mbzr4ever's Avatar
Registered Wahine
 
Join Date: Apr 2004
Posts: 614
Here we are back at the same place again.
Having no vacuum, as the engine will not shut off unless I block the air.
(Even the stop lever will not work.)
So replace the vacuum pump or rebuild?
Is there anyplace that rebuilds these?

__________________
1991 300E 124.030 103.983KE 722358 03 412178
207K

1979 240D 123.123 250K (Project car)

2000 Ford Ranger, 187K

2015 Dodge Ram 1500 EcoDiesel 37K
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 11:36 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page