M113 Crankcase Vacuum Hoses and Intake Manifold Warning! - Page 2 - Mercedes-Benz Forum
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#11 (permalink) Old 07-10-2012, 01:21 PM
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Originally Posted by lynns View Post
What is a 722.6 trans RST?

We usually use RST = Roadster Soft Top.
My mistake - I meant "rumble-strip" noise - I confused my terms. It occurs when the tourque converter switches to lock-up mode - when the actuator valve gets worn, the pressure in the lockup circuit is insufficient so it causes slippage of the lockup plate in the torque converter. This is a well documented problem on the Mercedes Sprinter, which uses a similar transmission (but the Sprinter uses the lockup for all gears, not just 5th gear like in the 722.6 - so the rumble strip noise occurs through all gears).

Superior transmission maxes a repair kit for this issue:

http://www.superior-transmission.com...age.cfm?ID=199

In my car it only occurs while in fifth gear when the RPM is around 2000 when using using light throttle going from coast to accelerate (happens between 65-75). The noise lasts for approximately 1/2 - 1 second, but it is obvious.

I replaced the Tourque converter lockup solenoid thinking that it was the problem, to no avail.

Last edited by buddha dean; 07-11-2012 at 06:27 AM. Reason: add link to repair kit
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#12 (permalink) Old 07-10-2012, 07:17 PM
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That's what Albert (aam) usually say about other things too

Ray my friend,

The laws of similarities.

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#13 (permalink) Old 07-11-2012, 06:28 AM
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Here is a photo of my temporary foil duct tape vacuum leak repair lending truth to the statement "all you need in life is duct tape and WD-40" (I was quite surprised to see the AMG sticker on the intake)
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#14 (permalink) Old 07-11-2012, 10:01 AM
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Air Intake Manifold vacuum hose

Scary! but it sounds like >100K miles.

Please read //pointedthree. com/disc/forums/showthread.php?tid=19288&mid=201161

The best price is for a used low mileage eBay M113 Intake Manifold p/n 1131400301 , 1131400701 , 1131400801 ($1350.00 MSRP) and misc. parts like the gaskets, etc.

MERCEDES BENZ INTAKE MANIFOLD WITH FUEL RAIL INJECTORS 1131400301 | eBay at $279.95
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Last edited by lynns; 02-13-2013 at 01:19 AM.
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#15 (permalink) Old 07-11-2012, 01:00 PM
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That is actually a good price. Parts.com has it for $972.

It is much lighter than it looks (magnesium alloy)

My total costs for the repair were under $40 excluding my time of course!
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#16 (permalink) Old 07-11-2012, 01:21 PM
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Scary!

//pointedthree dot com/disc/forums/showthread.php?tid=19288&mid=201161
I love the part about the dead mouse - maybe he was just trying to stay warm!

I did forget to mention disconnecting the hose completely does set the CEL, and has to be cleared.

Last edited by lynns; 02-12-2013 at 08:29 PM.
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#17 (permalink) Old 09-27-2012, 09:08 AM
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sorry to bring this post back up, but I was talking to Buddha Dean in person yesterday (It turned our his office is next door to mine... small world!)

looking at these picture, it seems like its possible to tap a thread in the Mg alloy, and install a barb end, that you can slip a regular hose on... problem is you still have to remove the manifold to do that... as there is not enough clearance to place the tap upside down in there...

I will look at my ML430 this evening to see if it can be done without removing the intake...

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Mercedes-Benz, W140 S Class S320 (AKA 300SE)

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Last edited by bayhas; 09-27-2012 at 09:10 AM.
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#18 (permalink) Old 02-12-2013, 07:37 PM
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For the R129.068 chassis and the M113.961 engine please consider the following Intake Manifold p/n's

MB p/n A113 140 03 01
MB p/n A113 140 07 01
MB p/n A113 140 08 01

Pierburg p/n 72267101
Pierburg p/n 72267104
Pierburg p/n 72267106

Note: add two new secondary air valves at $225 each, because the old ones will not come off the old manifold, or they will break in the attempt.

Intake manifold tubing to electric changeover valve - is shown in the EPC as a separate p/n A 0002760030 , available by the meter. Note: you cannot replace the tubing without major surgery.

Or just buy one with all of the attachment parts from eBay for about $400.00.
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Last edited by lynns; 02-13-2013 at 12:01 AM.
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#19 (permalink) Old 02-12-2013, 08:24 PM
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I was getting an Oil Change today at my favorite Indy and noticed five old Intake Manifolds in there trash pile and it prompted me to ask questions. To find out that they have NEVER had to replace a V8 113 Intake Manifolds. All of the old Intake Manifolds where six port. From 320 and 350 V6 engines. He showed me one that had it's Magnesium backside blown out possibly due to a back fire. He said that most of the V6 Intake Manifolds had broken outside plastic vacuum actuator air flap lever that open and close the internal flaps/baffles. >$2,000.00 expensive repair.

See attached PDF.
See the picture of a p/n 2721402401 C350 CLK350 E350 GLK350 ML350 SLK350 R350 Intake Manifold w/ External Plastic Air Flap Lever and External Aluminum Air Flap Lever (repair kit)
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Last edited by lynns; 02-13-2013 at 01:10 AM.
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#20 (permalink) Old 10-29-2014, 12:17 AM
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Bumping this back up from the dead. If someone were to encounter the same problem, or just have a leak occur in the vacuum hose too close to the manifold to be able to remedy with a splice, is there any reason why one could not just tee off of another vacuum line to provide for the manifold flap switchover valve?
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