Go Back  MBWorld.org Forums > Mercedes-Benz SUVs, Trucks, Vans, Diesels, Other > Diesel Forum
OM642 timing chain guide replacement and tools >

OM642 timing chain guide replacement and tools

Notices
Diesel Forum Forum for Diesel engine vehicle related discussion
Sponsored by:
Sponsored by:

OM642 timing chain guide replacement and tools

 
Old 04-17-2019, 09:28 PM
  #1  
DCW
Newbie
Thread Starter
 
Join Date: Apr 2019
Location: Downstate ILL
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
2012 E350 Bluetec, 2010 Passat Wagon, 2004 BMW 330Cic, 2012 Jeep Wrangler JKU
OM642 timing chain guide replacement and tools

Hello, first time poster here. Just purchased a 2012 E350 Bluetec with 144K miles on it knowing it had a timing chain noise on start-up. It would quiet down after a few seconds. I replaced the tensioner to see if I could get lucky, but that made it worse. So now I am planning on pulling in a new chain following the excellent write up https://mbworld.org/forums/diesel-fo...0-blutech.html. I done a few other cars in my past, most recently a Saab 900S turbo, but it was a complete replacement of all the sprockets, guides and not using old chain to pull in new one. After doing a lot of searching, I still have a few questions I'm hoping someone with experience can help me with.

With this kind of mileage, should I plan on also replacing guides? I assume I would have to remove both valve covers and take off the front cover of the engine? Or should I just try pulling in a new chain and see what I end up with?

Also, in the referenced post, it shows using a pry bar to keep the chain from coming off the sprocket. An internet search found the below tools, but I don't see how the sprocket tool mounts to anything to hold the chain on. I'm thinking the cam hold down plates are probably a good idea to keep the middle valve spring pressures from breaking the cams?

Thanks to anyone who has some valuable experience to share.
DCW


cam sprocket chain tool

cam hold down tool
DCW is offline  
Old 04-17-2019, 10:04 PM
  #2  
DCW
Newbie
Thread Starter
 
Join Date: Apr 2019
Location: Downstate ILL
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
2012 E350 Bluetec, 2010 Passat Wagon, 2004 BMW 330Cic, 2012 Jeep Wrangler JKU
I think I found the answer to one of my questions. I believe the sprocket tool lays horizontally 180 deg rotated from the above picture, and bolts to the top of the head. Therefore the tool guides both sides of the sprocket and the chain will extend out of the top.
DCW is offline  
Old 04-17-2019, 10:48 PM
  #3  
MBWorld Fanatic!
 
Join Date: Jan 2009
Location: V E G A S
Posts: 5,408
Received 486 Likes on 456 Posts
E250 BTC
Haven't hear about those engines eating chain guides.
Not direct comparison, but few years back I was replacing oil pump on OM603 engine with close to 300k miles.
Timing chain was not on my list, but I took close look at guides and inspected them good enough to put back.
kajtek1 is offline  
Old 04-17-2019, 11:16 PM
  #4  
DCW
Newbie
Thread Starter
 
Join Date: Apr 2019
Location: Downstate ILL
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
2012 E350 Bluetec, 2010 Passat Wagon, 2004 BMW 330Cic, 2012 Jeep Wrangler JKU
That sounds promising. Unlike some engines I've dealt with, like the SAAB, I haven't read any posts talking about guides breaking in two or being worn so bad they needed replacing. I'm planning on just replacing the chain unless others chime in with different stories. Thanks for info
DCW is offline  
 

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: OM642 timing chain guide replacement and tools


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: