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 ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-13-2003, 10:55 AM
Uk Merc Man's Avatar
Registered User
 
Join Date: Oct 2003
Location: South Coast, UK
Posts: 119
2.5 16v Valve Adjustment/Timing Chain

hi there. i just bought my 2.5 16v and put it into a local specialist for a check over, they recommended a new chain and tensioner and valve adjustment.

as you all know literature for these cars is in short supply, i just wondered if maybe someone had done the job themselves and photographed it? or perhaps some resources with some exploded diagrams?

i have searched about the forum and found some bits and pieces but was after something more complete-with pictures!!! anything to help a newbie with this daunting job really?!

thanks in advance
steve.
2.5 16v
Reply With Quote
  #2  
Old 10-13-2003, 12:56 PM
MrCjames's Avatar
California Dreaming
 
Join Date: Jun 2003
Location: SF Bay Area
Posts: 599
2.5 16V Adjustment

If you have access to a tool that secures the chain to the cam gears while threading in a new chain than why not. use it. Considering that you will most likely need to adjust a couple of the valves than camshaft R&R might be a better, more productive way to thread your new chain in.

Your valves are adjusted by using shims under the bucket. The shims are available in incremental thicknesses, at the moment I am unable to recall what that increment is. Measure the exact clearance for each valve with feeler gauges than record, determine if (in/out) of specification, remove appropriate buckets after cams are removed, perform appropriate math to solve for replacement shim needed to bring the valve lash into specification.


With spark plugs and camshafts removed you can feed your new chain in, than reinstall the camshafts to their basic “position.” Double check the “Basic Position(s)” of camshafts than rotate the engine at least two complete revolutions by hand to ensure you have no interference problems.

Reply With Quote
  #3  
Old 10-13-2003, 01:32 PM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
The 2.5 16V engine uses a double row timing chain that should go 150K to 200K with frequent oil changes.
However the tensioner could fail much earlier.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
  #4  
Old 10-13-2003, 03:39 PM
Uk Merc Man's Avatar
Registered User
 
Join Date: Oct 2003
Location: South Coast, UK
Posts: 119
Quote:
Originally posted by M.B.DOC
The 2.5 16V engine uses a double row timing chain that should go 150K to 200K with frequent oil changes.
However the tensioner could fail much earlier.
hi there, thanks for your reply (and u MrCjames!) i was told i had slight chain slap on start-up and was advised to renew tensioner and chain, i suppose i may as well do the job complete while i have access to it all.

do you know of any online resources that detail the job at all, i would really like some images before i jump in!

thanks again

steve
Reply With Quote
  #5  
Old 10-13-2003, 08:16 PM
Registered User
 
Join Date: Mar 2003
Location: New York
Posts: 101
I did replaced timing chain and guides on my 2.3-16. If I have to do it over again, I would remove the engine then replace the timing chain and guides.

It was a pain to do such jobs with the engine in the car, you can ask Tinker and a bunch of other people.

Alex
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 08:13 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page