VVF

mickey - will some oil leak out of the engine when you remove the tensioner?

Man, I should've done it when I was replacing my alternator I would hate to R&I it again... Maybe will just go to an indy.

jpman

If you look at my video you'll notice it is the same noise mine has.

VVF

Which probably means it's not the stretched chain?
Dunno, I need to think about it more

onehighfocus

This needs to be here. More pages from the shop manual

http://www.justanswer.com/mercedes/3...ed-timing.html

onehighfocus

This part is confusing me. Are the cams / cam sprockets supposed to be locked in position while drawing the new chain down and around the crank ? If so, what is the reference to being careful to keep the cams in sync?

VVF

No, you rotate them in sync. Otherwise if you rotate the crank with locked cams you risk the pistons hitting the valves imho.

onehighfocus

Ahhhhh righttt! So the locking part is only when cutting the chain and then when crimping the master link?

scottonfire

On that note, I would really love a DIY on getting the new timing chain in since there really isn't much out there w/ pictures and all that jazz!

onehighfocus

I agree. As many DIYs as there are on this specific subject (c230 m271 timing chain install - draw through method) it seems none cover every detail that the typical DIY driveway mechanic would need. I'm sure most can figure out how to get passed the gaps, but aren't DIYs there so you wouldn't have to?

Few things I'm still trying to figure out...

Tensioner plug/seal part number - Ahaa!!! FOUND IT! I think... 000 997 62 20
Will verify at the Dealer tomorrow



The easily breakable "weak" cam bolt that can occur while removing the cam cover?
https://mbworld.org/forums/5393235-post224.html

Timing chain retainer tool / home made metal brackets

Feeding the chain process. I see how you would turn the crank pulley to draw the chain down in on the intake sprocket, but at the same time you have to pull the chain coming up and over on the exhaust sprocket. Is there much resistance to turning the exhaust cam while the chain is coming out?

Looks like AutoZone might have a good method.
One person does this while another turns the crank pulley... slow and careful
http://repairguide.autozone.com/znet...3f8022f55c.jpg

scottonfire

Was this the right part? On pelican I found two- 000 997 62 20-INT and 000 997 62 20-MBZ. Seems like it would be the second since MBZ is mercedes, but not sure b/c INT is expansion plug on timing cover and MBZ is expansion plug on cylinder head.

onehighfocus

According to the dealer this is indeed the tensioner plug. I haven't actually tried to install yet to verify as in my experience, Dealers have been wrong about parts before.

000 997 62 20 is the base OEM Mercedes part number. The -INT and -MBZ is just what Pelican adds on to distinguish them as their own part numbers. This is typically when they have alternate brands of the same parts.

*edit...
Just stumbled on this as well
http://www.ecstuning.com/Mercedes_Be...ing/ES1611410/

jpman

VVF did you finally change your timing chain?

jpman

Speaking to VVF he mentioned that his indy checked timing angles through star and were able to say that the timing chain was not stretched based on that data. I guess where I am trying to get at is, can this data be directly related to timing chain stretch?

I ask because we can conclude MAF data based on how much adaptation the car is doing. Couldn't we conclude this data based on how much angle adjustment it is doing on idle?

scottonfire

There is no DIY on replacing the timing chain and tensioner that has enough detail, there's a WIS, which in my opinion sucks unless you've been working on cars your whole life. The parts to correctly install the chain are ridiculously expensive, and there's no youtube video that goes through how to get the timing right without seriously fuking up your engine. So here's what I'm doing. Since I'm close to 100K miles, rather than spend $ for a mechanic to tell me whether I do or don't need a new chain, I'm getting one put in. But, I bought the parts first and then shopped around the labor. If you start by saying you bought the parts and are over your head, they'll tell you some bull**** about not being able to warranty it for life, and then agree. Ask them if they've done this before. Tell them, before they quote you, that lifting the engine up is not necessary and the quote will be b/w $550 and $600 for a reputable indy. On a 4 cylinder engine, you can get the victor reinz valve cover gasket set, then get tensioner OEM and cap (listed in a post above) and the timing chain, possibly some timing cover gaskets. So the total is $750 and it sucks, but what are you gonna do?

jpman

It's been greatly advised to not use the victor reinz valve cover gasket.

scottonfire

no, incorrect. This is ONLY for the 6 cylinder engine that victor reinz gaskets cause leaks. There is a LOT of misinformation, especially for something everyone on this forum preaches as Supremely important- namely replacing the timing chain. I'm giving you the least headache way of getting the job done. Simple and to the point.

jpman

I stand corrected. It's not that hard from what I understand. With two people it can be done and the tools are not necessary. The only one necessary is the one to remove and bring in the master link. Remove valve cover. Set engine to TDC, remove master link on old chain, attach new chain to old chain, carefully spin engine while having one or two people holding the chain to the cam gears as they spin then remove old chain, close
Master link on new chain.

scottonfire

Check this ***** out. I just picked up my car from an indy cuz they couldn't do it. Didn't have the tool so they reimbursed me for the rental car. SO ANNOYING! For a job that's supposed to save the engine, there sure are no mechanics who are aware of this service. Literally, no mechanic in South Florida has done this on an M271. FRUSTRATING.

jpman

I know of someone who is willing to do it. He charges $800 with original Mercedes parts. He works on Mercedes all day long. Or we can try and do it ourselves, I'm in south florida too!

scottonfire

I'm $200 in already with parts, so I'm looking for labor only. I'm in Sarasota. Where are you?

jpman

Ooops. I'm in Miami.

RWDlifer

It's not a difficult job, just take your time. I did mine mostly solo, had some help feeding the new chain in. My old chain was stretched about 2mm at 125k miles, so the replacement was unnecessary. Car sounds exactly the same as before, I have a vid on this thread...

Preet

would you happen to have any diy for us?

jpman

RWDlifer,

thanks much for the insight. I believe it's an easy job too. As long as time is taken to pay attention to the important details in regards to timing and making sure your marks align. If the chain is fed with the old one, and the engine had not lost time then it should be a piece of cake.

What chain did you go with? MB part or Iwis?

RWDlifer

IWIS chain...I wish i'd done a DIY with pics, but I was able to do it without any printed publication. I gathered bits of info from this forum and dove right in...