timing chain link - PeachParts Mercedes-Benz Forum

SurferNate · #1 07-09-2007, 04:33 PM

I need some help on replacing my timing chain for a 1972 250C. The new chain's master link's shafts are bigger than the original chain links... are there any tricks. I did verify that the chain part number was correct for this model.

Arthur Dalton · #2 07-09-2007, 08:37 PM

What part# do you have??

http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=23I0RAMEE24N183ICS&year=1972&make=MB&model=250-C-001&category=A&part=Timing+Chain+Link

SurferNate · #3 07-09-2007, 10:09 PM

IWIS chain is part# 0009977094. The replacement link would most likely have the same problem. I might just have to grind down some of the link shafting and then order a replacement master link to complete the process.

Chas H · #4 07-09-2007, 10:14 PM

A good hardware or auto parts store might have an old thinner master link. Swap it out for the real one once the chain has been treaded.

SurferNate · #5 07-09-2007, 10:30 PM

I look at an auto parts store tomorrow, I checked my local tru-value and there was no links with the long shafts...

Chas H · #6 07-09-2007, 10:41 PM

Aha! The shaft/pin on the new chain is longer? If so that shouldn't be a problem. I've had trouble 'cause the new chain had a master link too fat to fit into the original chain, or had no groove for a retaining clip since it was the bludgeon type link.
A motorcycle shop might have a workable master link.

Arthur Dalton · #7 07-09-2007, 10:49 PM

Quote:

Originally Posted by SurferNate

I need some help on replacing my timing chain for a 1972 250C. The new chain's master link's shafts are bigger than the original chain links... are there any tricks. I did verify that the chain part number was correct for this model.

Bigger [ as diameter] or Longer ????

SurferNate · #8 07-09-2007, 11:48 PM

this is my problem: ""I've had trouble 'cause the new chain had a master link too fat to fit into the original chain.""
So Chas H, what did you do?

Chas H · #9 07-10-2007, 12:07 AM

Quote:

Originally Posted by SurferNate

this is my problem: ""I've had trouble 'cause the new chain had a master link too fat to fit into the original chain.""
So Chas H, what did you do?

I went to the hardware store and bought a master link that fit. It was a sloppy fit in the new chain, but it only had to drag the new chain around while I turned the engine by hand.
Most likely your old chain had a clip holding the master link together and the new chain requires upsetting the pins. So it's an older style master link you need. Some store or repair business will have one or you can order one online from McMaster-Carr.

Arthur Dalton · #10 07-10-2007, 04:46 AM

....or, if you can not find one long enough, you can easily make one by grinding off one of the connecting pins on the new master and replace it with a soft headed nail the correct diameter/length of the old chain ...peen over the other end and you have a link that fits both old/new chain..use a small washer the size of the nail so the peen end holds well. [ Cut the nail 1/8" oversize in length...that will give you enough stock to make a good peen.]
Once chain is installed, grind/dremel off peen and remove the nail/master . Install another new link.

If you are comfortable making/peening the fabricated pins, you could also make these pins on both sides if you just use the two link eyelets..that way, you would not ruin the new master you already have.

t walgamuth · #11 07-10-2007, 08:00 AM

I would not be comfortable with anything but the correct part.

anything else would be the weak link in the chain.

Tom W

Arthur Dalton · #12 07-10-2007, 10:29 AM

[QUOTE=t walgamuth;1559440]I would not be comfortable with anything but the correct part.

anything else would be the weak link in the chain >>

You do use the correct part..after you thread then new chain in..there is no CORRECT PART for threading in a chain that has a different pin size than the stock chain.
Do you actually think/suggest I was recommending running the car with that fabricated link tool ???
It is simply a temporary tool for Rolling in the new chain . That's all it does. The CORRECT link gets installed once the chain has been rolled in after using the old chain to pull it thru.
I will say that I have never seen an Iwis chain that was not to OEM Benz spec . Either they have made the pins larger for a stronger chain or possibly the old chain is not the original ??
You may also want to observe the old chain thru one complete revolution to see if it has a master link..
[ indicating it is not an original chain] ..if that is the case , you could use that master as the pull thru link.
You have most likely done so, but things to consider...