99C43n843

so ive been hearing this rattle at the front of the engine at idle. no knock or ping. not lifter noise etc. thought to be plastic idler. replaced with new. didnt fix. but needed to change anyway pulley was cracked. changed to updated belt tensioner. found noise to be resonating from front of engine around air pump. well let me make it short. ran without belt..noise still there. well I found the problem to be a timing chain noise. so either timing tensioner, chain, or guides. changed timing tensioner first...still there. did the chain today..and noise is gone. so if any of you have that noise thats what it is


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DRBC43AMG

Amazing to hear that the chain needed to be changed...
How many miles/km do you have on the engine? Was it worn? I thought the chain lived longer than most M113 engines

99C43n843

engine has 140k miles on it. I got it with 130 and its done it since Ive had it. it was definitely stretched to be making the noise. I couldnt compare the old to the new because I rolled the chain in. instead of taking the front cover off. it definitely runs a lot better. and No rattle anymore. it probably could of been for xxxxx miles before really needing to be changed. but im a tech and im not gna listen to that rattle everyday haha. it just hurt my ears. made my 43 sound old or cheap until I hit the gas then the exhaust takes over any noise or rattle hahaha



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99C43n843

oh and it is a double roller chain. no idea why it got stretched. car and engine are spotless


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DRBC43AMG

Perhaps your engine got the last chain made on a Friday before the weekend break...

99C43n843

haha it could of been. but im sticking to it just being old.


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dls55amg

how long did job take ?

99C43n843

should only take 2-3 hrs. but when I put it back together I had jumped one tooth and when I started it. I got immediate CEL and had cyl 5 6 7 misfire. tore it back down and had it fixed back in a hour or so. got it fixed and drove 2 hrs to my parents... ran perfect.


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speed43

Any chance you can do a HOW TO for this job? My chain is kinda noise and I wouldn't mind changing it. Thanks

Sulaco

I'm also interested in this job. Mine has 270k miles on all the original components except for water pump and HB. I'm sure I'm missing some MPG and HP. Also maybe a valve and lifter job

99C43n843

I have definitely noticed a difference in gas mileage. put the new chain in and immediately drove 4hrs and adveraged 24mph doin 70ish. and a couple bursts over a 100 lol. and to do a "how to" video I don't think so. my car has been the only m113 engine to ever have a timing chain replaced. sounds crazy but any other mb tech I've asked also have never done this job bc everyone thinks there "bullet proof" and never needed it. so I'm not sure when I'd ever be able to video it again. and sorry I don't really want to take mine apart again...for free that is. but I can probably post the WIS documents if that would help... although you Will need MB special tools to do it the way i did by rolling it in..instead of taking the front cover off.



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99C43n843

sorry. let me be specic. when I said my car has been the only m113 engine to have the chain replaced...I didn't add...its the only one in my shop to have been done


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Sulaco

Resurrecting thread.

I'm super interested in this. My 99 has 298k miles and the chain has a lot of rattle to it (has since I got it at 240k miles).

Shop quoted me 1200 to do the chain (I assume that means guides, too, due to the price). But lately I'm really interested in at least trying to roll a chain on myself. I would REALLY appreciate any direction I can get.

I did the head gasket myself on my old m104 C280, but I'm a little afraid of this job since it's a hand-made AMG motor and I have no idea if the job is advisable in my own garage.

I might start a new thread and do a pictorial if I can get some help on how to do the job.

PJmak

Is this member even active still?

My car has a rattle on cold start up then it goes away. Would this be chain related?

Sulaco

Eh, I would assume true timing chain rattle will always be present at idle. I know mine is! I need to find a way to get it taken care of ASAP.