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 06-25-2012, 09:21 AM
Registered User
 
Join Date: May 2012
Posts: 11
Yet another timing chain DIY mishap

Hi, I have been lurking for a while, reading posts. I tried to replace my own timing chain. Huge mistake. It didn't even need to be replaced, the car only had 206k miles, and the chain was fine. Anyway, the new chain slipped off, and I was able to retrieve it. This is what I have. The car is a 1993 mercedes 300d with a 2.5l diesel. I believe it is the OM602 engine. It is a 5 cylinder.

While I was in there I removed the ALDA, and had the injectors rebuilt. I am totally bummed out, as I don't know what to do. Some ideas include getting the master link up top, have an assistant hold the chain both ends, pull the chain off the camshaft sprocket, and then manually roll the camshaft one tooth clockwise, then re-attach the chain.

The chain has NOT been crimped over yet.

I am aware the fuel pump will most likely be off timing, but I think I can re-calibrate that .. . . another search another thread.

Also, these were the timing marks I got with the new tensioner in place.

I am starting to get to the point where I am going to simply junk the car. It ran wonderful before my idiotic idea. I only want another 100k miles. I am not a man of $$ means, I just bought a house, have a first child on the way. Pease help! Thank you.

Attached Thumbnails
Yet another timing chain DIY mishap-img_0453.jpg  
Reply With Quote
  #2  
Old 06-25-2012, 09:24 AM
Registered User
 
Join Date: May 2012
Posts: 11
this is the crankshaft timing marks that go with the above picture:

OK, so I can't upload anymore pictures, but the crank shaft timing is about 16 degrees past the TDC mark while cranking the engine clockwise. I'll try tomorrow to post pics.
Reply With Quote
  #3  
Old 06-25-2012, 09:26 AM
Registered User
 
Join Date: Jul 2004
Location: Barrington, RI
Posts: 5,874
What prompted you to replace the chain in the first place? Just mileage?
__________________
14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife
Reply With Quote
  #4  
Old 06-25-2012, 09:41 AM
Registered User
 
Join Date: May 2012
Posts: 11
Yes, just milage, and the advice of a more popular DIY mercedes online parts vendors. I may add the vendor gave me 0 help or feedback, so never again.
Reply With Quote
  #5  
Old 06-25-2012, 09:43 AM
Registered User
 
Join Date: Jul 2004
Location: Barrington, RI
Posts: 5,874
Did you check the stretch before you replaced it? If so, how off was it?
__________________
14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife
Reply With Quote
  #6  
Old 06-25-2012, 10:00 AM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Quote:
Originally Posted by crunkflunky View Post
this is the crankshaft timing marks that go with the above picture:

OK, so I can't upload anymore pictures, but the crank shaft timing is about 16 degrees past the TDC mark while cranking the engine clockwise. I'll try tomorrow to post pics.
Relax.

No big problem and no need to consider junking vehicle.

The crankshaft is currently 16 degrees after TDC with the camshaft marks spot on. So, the camshaft is late with respect to the crankshaft. All you need to do is to loosen the chain and rotate the camshaft one tooth clockwise. The camshaft should pickup the lost timing perfectly.

Perform the above and post photos of the crankshaft and the cam marks after you have rotated the crankshaft by hand at least one full turn.

Whatever you do............DO NOT CRANK THE ENGINE WITH THE STARTER UNTIL WE VERIFY THE PROPER CAM TIMING.

Last edited by Brian Carlton; 06-25-2012 at 10:15 AM.
Reply With Quote
  #7  
Old 06-25-2012, 10:13 AM
engatwork's Avatar
busy
 
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 13,635
^x2
__________________
Jim
Reply With Quote
  #8  
Old 06-25-2012, 10:14 AM
Posting since Jan 2000
 
Join Date: Sep 2011
Posts: 7,164
As Brian says, no harm, no foul. Just relax and get it properly timed and back together.

I cringe when I see DIY'ers changing the chain. It's not terribly difficult, but for those who haven't done it before, it can have a much worse ending than what you are dealing with.

This is one area where the old "if it ain't broke, don't fix it" suggestion applies.

Just relax, Brian has you on the road to recovery.
__________________
2001 SLK 320 six speed manual
2014 Porsche Cayenne six speed manual

Annoy a Liberal, Read the Constitution
Reply With Quote
  #9  
Old 07-09-2012, 05:52 AM
Registered User
 
Join Date: May 2012
Posts: 11
Thanks all. I did get the timing where it should be. There was an accident, I was moving too quick, and I dropped the center link down the engine. It's just one little center link, maybe it fell all the way to the bottom and is sitting in oil no?

If you guys say so, I will do what is needed to get that chain link out. Is it a matter of simply dropping the oil pan?

Also, I was going to ask if any of you could offer (for $$) and old chain that I might cannibalize a link or two off of. I'm guessing you're all going to say "get that link that fell down in your engine!"

. . . (loud sigh . . . ) I'm actually taking this pretty well I mean it could be worse. I do always enjoy working on this car, so now I have even MORE time to mess with it!

Thanks all, you guys are the best!
-Dana
Reply With Quote
  #10  
Old 07-09-2012, 06:59 AM
Registered User
 
Join Date: Dec 2011
Location: North West CT
Posts: 378
Guess I'll be the one to tell you what you already know- Get that link out.

Anything solid, other than motor oil in the pan could be ruinous to your engine.

Keep that positive attitude!
__________________
Chief

1991 350SD
Reply With Quote
  #11  
Old 07-09-2012, 10:42 AM
RML RML is offline
Out of Garage Space
 
Join Date: Jun 2006
Location: Southwest PA
Posts: 1,034
Hang in there. Don't despair. You have Brian looking over your shoulder and could not ask for anything better.
__________________
85 300D 75K Anthracite Grey 0-60 in 13 seconds **For Sale**
84 300D 333K Black (The Velveteen Rabbit) 0-60 in 14 seconds
00 Toyota Sienna 208K (Sold)
15 Subaru Outback 43K
11 Subaru Outback 67K
98 Ford Taurus 100K (Gertie - Was Grandma's - drove it to church and shopping - really) Daughter's car now.
30 Model A Ford 2 Door Sedan (Sold) 0-60 in . . . Never reached 60
Reply With Quote
  #12  
Old 07-09-2012, 03:00 PM
engatwork's Avatar
busy
 
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 13,635
I don't remember if your car is applicable but look at the passenger side of the oil pan. See if there is either a cooler or additional section there. Drain the oil and remove that side piece screwed onto the oil pan if it is there. Pick up a new gasket to put in place when you reinstall it.

Hopefully, you will find it in the oil pan.
__________________
Jim
Reply With Quote
  #13  
Old 07-09-2012, 03:58 PM
Registered User
 
Join Date: Jan 2012
Posts: 450
I've been in similar DIY mishaps. Just take a deep breath, ask for guidance and support as you are doing, and make SURE you have the right information and tools, and give it another go.

You'll be OK.

Sincerely,

Packer
__________________
83 240D - 4 speed manual - Manilla Beige
189K miles, Tachometer mod, cool wooden shift knob from PeachParts, CocoMats, Original factory paint, manual windows, manual sunroof. Starting to add AudioWrap to this car too!
Reply With Quote
  #14  
Old 07-09-2012, 06:35 PM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Quote:
Originally Posted by crunkflunky View Post
Thanks all. I did get the timing where it should be. There was an accident, I was moving too quick, and I dropped the center link down the engine. It's just one little center link, maybe it fell all the way to the bottom and is sitting in oil no?
Hopefully.

However, it is just as likely that it is sitting on top of the chain, wedged into the crankshaft sprocket. You'll need to rotate the engine by hand several times to be sure that it falls all the way down to the pan.

In any case, you do need to find it. You don't know the condition of the oil pump screen and certainly don't want to assume the screen will prevent ingestion of this link.
Reply With Quote
  #15  
Old 07-11-2012, 07:11 AM
Registered User
 
Join Date: May 2012
Posts: 11
Right, I figured it could be sitting on the sprocket down bottom. So, dropping the oil pan is a first start? I am NOT giving up!

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 02:17 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, 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