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2001 S600, 2002 C32 AMG, 2004 SL55 AMG
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Discussion Starter #1
Hi! I'm halfway into fixing assorted oil leaks on an '01 M137 NA S600, and I'm looking to pull the heads. Reading various WIS documents on the tools to hold the camshaft and adjusters, the above tool gets referenced several times. I picked one up (because hey, why not; sometimes these oddball tools are huge time savers), and have no idea what I'm actually supposed to do with this one. It certainly doesn't clip or stay attached in any way to the camshaft adjusters.

Locating Device 137-589-00-40-00 | SmithMercedesDealerParts

For reference, here's one of the WIS docs that reference it. Set the basic position of camshafts - JustAnswer . Just 'cupping' the sprocket doesn't seem to serve any purpose. Is this intended purpose to just keep the chain from falling into the timing cover? Funnily enough, this part appears to have a manufacture date from 2017, so surely it wasn't an inside joke :)
 

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2001 S600, 2002 C32 AMG, 2004 SL55 AMG
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Discussion Starter #2
Oops, I meant 'Halteklammer', or 'Retaining clamp'. I'd understand more if it actually clamped in some way.
 

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2009 E350 4M Avant Garde, My Mistress 2002 S600, Wife 2014 C300 4M Avant Garde with AMG
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It is used to hold the spring loaded guts of the sprocket inside when you loosen the sprocket from the camshaft.
In my case I didn't, and had bits and pieces all over, and a heck of a time to assemble it correctly.
In the end I used locking wire to hold it all together for re installation.
 

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2009 E350 4M Avant Garde, My Mistress 2002 S600, Wife 2014 C300 4M Avant Garde with AMG
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....and, mark the sprockets and chain position BEFORE disassembly.
 

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2001 S600, 2002 C32 AMG, 2004 SL55 AMG
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Discussion Starter #5
Thanks a lot, I would have had no idea it was spring-loaded from the instructions! That is definitely a surprise I'm happy to miss :) and I'm marking everything in advance.

Did you find any use for the 28.5/29.5 mm open-ended wrench also referenced? That's a rarer thing I think I can ignore, suspecting it's just used to rotate the camshaft if it's misaligned...
 

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2009 E350 4M Avant Garde, My Mistress 2002 S600, Wife 2014 C300 4M Avant Garde with AMG
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You need to hold the cams with a special holding fixture in order to loosen the sprocket bolt. You cannot use the chain/crankshaft to hold them, as the chain cannot be used for that. Loosening and later torquing the sprocket is not for the faint of heart - read the WIS!
Good luck
 

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Maserati Quattroporte, CL600, S500, BMW 330cic, E65 BMW 750LI. Dodge Ram
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You have to pull the heads to get to the oil cooler in the Valley of The V. It’s just way too hot under the hood for an M137.
 

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2009 E350 4M Avant Garde, My Mistress 2002 S600, Wife 2014 C300 4M Avant Garde with AMG
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The cause of the oil cooler leak is excessive heat due to blockage of the vent venturi inside the front of the right valve cover.
There is an SB on this subject, and how to clean it; MB never connected the two as cause of the oil cooler troubles.
If you search my nick here and the other forum, you will find the info on it.
 

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2001 S600, 2002 C32 AMG, 2004 SL55 AMG
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Discussion Starter #11
Thanks, yeah I got the other clamps. Thankfully they were more obvious in their function.

This is definitely a 'while you're in there' kind of engine because nothing's really direct to get to compared to the M112/3. You have to remove the crank pulley to change the water pump too. The oil cooler and the breather tubes had turned to brittle plastic, valve covers were leaking, it was still on factory plugs, a coil pack had failed, and enough dirt and leaves under the intake manifold to plant a potato patch. Cleaned out the venturi behind the right side front cover, and it was definitely sludge-city in there.

This engine only has a hair over 50k miles, but figure 19 year old rubber is gonna be mostly poor shape anyway, and there are plenty of other hard seals getting replaced along the way. I recently found that FCPEuro even has a kit of every seal, though I ordered them earlier individually. Mercedes Oil Cooler Gasket Kit - Genuine Mercedes 1371880501FULL
 

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2009 E350 4M Avant Garde, My Mistress 2002 S600, Wife 2014 C300 4M Avant Garde with AMG
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You are on te right track! Mine too had about the same mileage, and completely cooked vent hoses due to the blocked venturi.
Water pump? Never have had a problem yet.
I took picures of all hose and wire routings - if you need any let me know.
Did mine in 2014, and runs fine ever since.
Good luck!
 

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2009 E350 4M Avant Garde, My Mistress 2002 S600, Wife 2014 C300 4M Avant Garde with AMG
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Hint: When you install the new oil cooler, after torqing, re-check the screws that hold the cooler halves together; mine were a bit loose from the added compression.
 

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2009 E350 4M Avant Garde, My Mistress 2002 S600, Wife 2014 C300 4M Avant Garde with AMG
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Another Hint: To remove the chain guide pins on the front, don't use the shown impact puller.
Make your own from a bolt with a cut tube and a stack of washers, and it will do a better job, because you can add washers as the pins come out. Watch the different length for reinstallation.

If you use the impact puller, you are liable to hit the radiator.
 

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2001 S600, 2002 C32 AMG, 2004 SL55 AMG
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Discussion Starter #15

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Discussion Starter #16
Here's what the clamps look like in action. It was great to know that the cam sprockets were spring-loaded, they worked perfectly.

2630210
 

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Discussion Starter #17
Other progress for the day. I didn't have to retighten the screws holding the cooler together, but I did have to circle the cooler bolts a few times. The engine cleaned up nicely! Now to do something about that ratty insulation at the firewall. Any suggestions? Also did you use silicone sealant or is the head gasket enough? I scraped a lot off but it's not clear if it was necessary.

2630211


2630212


2630213


2630214
 

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2009 E350 4M Avant Garde, My Mistress 2002 S600, Wife 2014 C300 4M Avant Garde with AMG
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1,017 Posts
clean up the head surface, but install the head gaskets dry.
Getting the heads in place accurately is actually a 2 man job.
Good luck!!!!
 

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2009 E350 4M Avant Garde, My Mistress 2002 S600, Wife 2014 C300 4M Avant Garde with AMG
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1,017 Posts
Did you measure the head bolts for stretch as per WIS?
Important as retorquing is quite a job.
 

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2009 E350 4M Avant Garde, My Mistress 2002 S600, Wife 2014 C300 4M Avant Garde with AMG
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picture of head bold measure
 
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