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Hey all, happy new W212 E63 owner, coming from an E46 M3 and absolutely loving this AMG Merc so far!
Checked my harness for oil and found 3/4 of my cam sensors are leaky but luckily the ECU is dry. I ordered 4 new sensors and in the meantime I've been trying to track down the torque spec for the screw. I searched on here and on google and found the magnet cam adjuster / solenoid spec but nothing for the cam sensor. Every video or guide I've found on it just tightens by feel, but I prefer to do everything by spec.
Anyone able to help out with the spec pdf for the cam position sensors on the M157?
Thanks in advance!
Last edited by MBShepherd; Sep 8, 2025 at 10:42 PM.
Hey all, happy new W212 E63 owner, coming from an E46 M3 and absolutely loving this AMG Merc so far!
Checked my harness for oil and found 3/4 of my cam sensors are leaky but luckily the ECU is dry. I ordered 4 new sensors and in the meantime I've been trying to track down the torque spec for the screw. I searched on here and on google and found the magnet cam adjuster / solenoid spec but nothing for the cam sensor. Every video or guide I've found on it just tightens by feel, but I prefer to do everything by spec.
Anyone able to help out with the spec pdf for the cam position sensors on the M157?
Thanks in advance!
8 Nm from WIS on a CLK, can't imagine it's different for an m157; and it's good not to over tighten these bolts, they're soft (?aluminum) so I think you're wise to know the torque spec
Thanks for the link, Peter! I don't know why that didn't come up in my forum search.
Agreed on the torque, it should be aluminum on aluminum from what I've researched and I plan to keep this car for a long time, would rather do everything right.
Thanks for the link, Peter! I don't know why that didn't come up in my forum search.
Agreed on the torque, it should be aluminum on aluminum from what I've researched and I plan to keep this car for a long time, would rather do everything right.
FYI just wanted to let you know the timing cover is not aluminum its actually magnesium so just be careful also good know side effect when washing your engine bay be careful with the timing cover since water and soap with acidic PH can eat into it
Adding the tasos video for context just check and make sure if your timing cover is leaking or not about to do this myself before I head down to tail of the dragon soon
FYI just wanted to let you know the timing cover is not aluminum its actually magnesium so just be careful also good know side effect when washing your engine bay be careful with the timing cover since water and soap with acidic PH can eat into it
Adding the tasos video for context just check and make sure if your timing cover is leaking or not about to do this myself before I head down to tail of the dragon soon
Thanks for the additional info, I wasn't aware the cover was pure magnesium... interesting choice by AMG/Mercedes there. Are more reliable upgraded replacements available for this part or do folks just lightly sand the bad seal like Tasos? That's actually my next job and maybe I should make a new thread for this, but while we're on the topic I believe that cover is leaking at the bottom on the passenger side.
A bit hard to get a picture of, but I don't know what else this could be, it's basically got a film of oil right below the cover. I circled it in red.
Also, circled in blue, does anyone know what this vacuum line is called or specifically that clip on what I believe is a coolant line? It looks like mine is broken.
Thanks for the additional info, I wasn't aware the cover was pure magnesium... interesting choice by AMG/Mercedes there. Are more reliable upgraded replacements available for this part or do folks just lightly sand the bad seal like Tasos? That's actually my next job and maybe I should make a new thread for this, but while we're on the topic I believe that cover is leaking at the bottom on the passenger side.
A bit hard to get a picture of, but I don't know what else this could be, it's basically got a film of oil right below the cover. I circled it in red.
Also, circled in blue, does anyone know what this vacuum line is called or specifically that clip on what I believe is a coolant line? It looks like mine is broken.
The blue circle appears to be the EVAP purge line…? Does it travel to the circular cup-sized container by left headlight?
The blue circle appears to be the EVAP purge line…? Does it travel to the circular cup-sized container by left headlight?
Thanks for the response, sorry for my delay it's been busy.
To answer your question, I believe so, if left = passenger.
Attached is a more zoomed out picture, the small line that attaches to that clip (circled in red) connects to what's circled in orange.
In the meantime I've been looking for the best way to find this information on my own as well as factory repair instructions, and it looks like I need to get Xentry + WIS. It seems like BenzNinja is the way to go with this?
After wiping down the seal on my passenger front timing cover, it seems like it's definitely got a slow seep. My next project is to figure out how to replace this DIY.
Edit: Also, thanks again to all for the torque spec on the cam position sensors. Got them replaced successfully and added the sacrificial harnesses from FCP Euro to the solenoids.
Last edited by MBShepherd; Oct 5, 2025 at 04:59 PM.
The front valve cover reseal was certainly eventful and more challenging than I thought it would be, but it was mostly the charge pipes.
Prepping the valve cover and cleaning the gasket was actually one of the easier parts. I used Loctite 7200 (Mercedes Gasket Remover), 1000 and 1500 grit sandpaper (for the grey coating on the inside of the cover), some plastic razor blades and picks I got on Amazon for $5. Took it out for some spirited driving and everything is holding up well. I live in a cold climate and I let it cure for 48 hours before driving, pretty sure this is overkill but I was still struggling to get the charge pipe on at that point.
It was a rewarding experience, the car definitely feels like its mine now! Absolutely love this car!
For future searchers, in addition to the Tasos video @SouthSideE63S linked above this video was helpful, it's for an M278 and I seemed to have much less space than he had:
I also recommend a 7mm and 8mm ratcheting wrench, E10 universal joint, grease for reattaching the pipes, tons of shop towels + rags, a magnetic flashlight or a head light, and a flexible magnet for when you inevitably drop your wrench/screw/socket/sanity under the engine.
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