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
  #1  
Old 01-03-2010, 08:53 PM
CAJUN COUNTRY
 
Join Date: Jun 2006
Location: CAJUN COUNTRY LOUISIANA
Posts: 552
What would you do if your stem seals looked like this see pic's

You can see the bad condition of my old stem seal. I'm going to replace them. Obvious from the pic's. The roto cap looks good to me but I've never looked at one before, See 2 pics of roto cap. It sits below the stem seal around the valve guide in the hole I have circled in red. I put my finger inside the roto cap and found it is a bearing of sort. It removed easily. ***Should it be a very tight bearing or have a slight movement between the bearings if you wiggle it with your finger in the center. Should the roto caps be changed.

Attached Thumbnails
What would you do if your stem seals looked like this see pic's-merc-stem-seals-3.jpg   What would you do if your stem seals looked like this see pic's-merc-stem-seals-1.jpg   What would you do if your stem seals looked like this see pic's-merc-stem-seals-2.jpg   What would you do if your stem seals looked like this see pic's-merc-stem-seals.jpg  
Reply With Quote
  #2  
Old 01-04-2010, 12:59 AM
CAJUN COUNTRY
 
Join Date: Jun 2006
Location: CAJUN COUNTRY LOUISIANA
Posts: 552
Does no one know anything about roto caps. Use to be someone would.
Reply With Quote
  #3  
Old 01-04-2010, 01:12 PM
CAJUN COUNTRY
 
Join Date: Jun 2006
Location: CAJUN COUNTRY LOUISIANA
Posts: 552
Does anyone know what roto caps functions are at least.
Reply With Quote
  #4  
Old 01-04-2010, 01:22 PM
Registered Hack
 
Join Date: Mar 2008
Posts: 4,625
the rotocaps should feel loose and 'wiggly'. They are there to compensate for any abnormal valve spring tendencies (ie.. unevenness). As long as they spin freely, wobble and remain intact, they are fine.

It is nearly impossible to judge the condition of valve stem seals via picture. You can make an assumption based on how brittle they are... maybe.

I strongly suggest you wiggle the valve stems in the valve guides to determine what shape the guides are in. If you suspect that you are burning oil through this region, the issue may quickly reappear after you have replaced the seals. A slight wiggle on any stem means the guide is basically toast.

__________________

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 01:05 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