New oil in connectors after cam sensor change
Thread Starter
Member
Joined: Sep 2007
Posts: 104
Likes: 38
From: NYC
2006 cls 55 amg
New oil in connectors after cam sensor change
I changed out my 4 cam sensors and 4 pucks after finding oil in 2 cam sensor connectors, after a few thousand miles I inspected and found oil again in the 2 cam sensor connectors that had been leaking previously. I used dealer parts and cleaned thoroughly at the time. I am now wondering if my new sensors are leaking or is the oil that had wicked up the harness previously flowing back down now that the source of new oil has been stopped...I am wondering if any other members have experienced the same thing?
Out Of Control!!
Joined: Jun 2004
Posts: 13,799
Likes: 3,228
2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
I changed out my 4 cam sensors and 4 pucks after finding oil in 2 cam sensor connectors, after a few thousand miles I inspected and found oil again in the 2 cam sensor connectors that had been leaking previously. I used dealer parts and cleaned thoroughly at the time. I am now wondering if my new sensors are leaking or is the oil that had wicked up the harness previously flowing back down now that the source of new oil has been stopped...I am wondering if any other members have experienced the same thing?
btw how did you get the 2 hardest pucks out? I could only get to 2
Last edited by PeterUbers; Oct 16, 2022 at 06:07 PM.
Super Member
Joined: Aug 2018
Posts: 697
Likes: 172
From: Seattle, WA
2019 M5 Comp, 2005 Ariel Atom 2
Seconded, I still had some oil in my cam connectors 2k miles later, just keep checking and spraying, it will only get more oil out since you've plugged the leak. If they weren't terrible I wouldn't worry about a lot of migration elsewhere.
Thread Starter
Member
Joined: Sep 2007
Posts: 104
Likes: 38
From: NYC
2006 cls 55 amg
I actually only did 3 of the 4 pucks. With the plastic oil filter cap off, the 3rd one was easy, I did it when I was changing the oil. The 4th one will have to wait...
Thank you for the feedback on the oil, That was what I was sort of thinking/hoping. In my case I feel like I got to it in time, no oil at the injector plugs, ecu or the plug down by the oil pan (crank position sensor?). I plan on just cleaning the connectors at the 2 previously leaky locations and checking 1 remaining puck every 2 or 3 thousand miles and check all 8 connectors every oil change...fingers crossed!
Thank you for the feedback on the oil, That was what I was sort of thinking/hoping. In my case I feel like I got to it in time, no oil at the injector plugs, ecu or the plug down by the oil pan (crank position sensor?). I plan on just cleaning the connectors at the 2 previously leaky locations and checking 1 remaining puck every 2 or 3 thousand miles and check all 8 connectors every oil change...fingers crossed!
Super Member
Joined: Aug 2018
Posts: 697
Likes: 172
From: Seattle, WA
2019 M5 Comp, 2005 Ariel Atom 2
I actually only did 3 of the 4 pucks. With the plastic oil filter cap off, the 3rd one was easy, I did it when I was changing the oil. The 4th one will have to wait...
Thank you for the feedback on the oil, That was what I was sort of thinking/hoping. In my case I feel like I got to it in time, no oil at the injector plugs, ecu or the plug down by the oil pan (crank position sensor?). I plan on just cleaning the connectors at the 2 previously leaky locations and checking 1 remaining puck every 2 or 3 thousand miles and check all 8 connectors every oil change...fingers crossed!
Thank you for the feedback on the oil, That was what I was sort of thinking/hoping. In my case I feel like I got to it in time, no oil at the injector plugs, ecu or the plug down by the oil pan (crank position sensor?). I plan on just cleaning the connectors at the 2 previously leaky locations and checking 1 remaining puck every 2 or 3 thousand miles and check all 8 connectors every oil change...fingers crossed!
The 4th IS possible with the filter cap off and loosening the hard oil lines but you almost have to force the puck in (prepare for skinned knuckles), but I was able to do it on our GL63 a couple years back. Those are less prone to leaking, so like you I only did the easier ones on my E63 and just bought the harness extenders to make monitoring easier.
Senior Member
Joined: Feb 2005
Posts: 253
Likes: 51
From: Bay Area, CA
05 C55-gone 06 E55-gone 15 P85D 14 E63 S 11 Sonata 😅
I changed out my 4 cam sensors and 4 pucks after finding oil in 2 cam sensor connectors, after a few thousand miles I inspected and found oil again in the 2 cam sensor connectors that had been leaking previously. I used dealer parts and cleaned thoroughly at the time. I am now wondering if my new sensors are leaking or is the oil that had wicked up the harness previously flowing back down now that the source of new oil has been stopped...I am wondering if any other members have experienced the same thing?
same issue here after 1k miles, in 2/4 sensors, 3/4 had oil prior to the change.
i purchased from fcp euro so free replacement…
I had all 4 magnets changed when I had the timing cover resealed, along with the coolant lines. I didn’t notice any leaks from magnets but changed them regardless.
Trending Topics
Super Member
Joined: Oct 2013
Posts: 745
Likes: 139
14 E63, 05 E55, 03 Evo 8, 08 F250, 06 R6R, 92 Talon TSI, and instability
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Out Of Control!!
Joined: Jun 2004
Posts: 13,799
Likes: 3,228
2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
Senior Member
Joined: Feb 2005
Posts: 253
Likes: 51
From: Bay Area, CA
05 C55-gone 06 E55-gone 15 P85D 14 E63 S 11 Sonata 😅
Out Of Control!!
Joined: Jun 2004
Posts: 13,799
Likes: 3,228
2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
sadly, depending on how much oil is in the harnessed it'll still be able to wick itself via capillary action to the ecu .. remain vigilant on checking the ecu routinely and consider oil at the ecu if you get like ten gremlin electrical issues at once
MBWorld Fanatic!
Joined: Dec 2003
Posts: 6,279
Likes: 58
From: OC
i drive them all, fast and hard
is there a parts number listing for this work about cam sensors and oil. I have a 2012 63 with almost 90K miles on it. I have never checked them but saw some videos about it and now i am concerned. If its not too difficult to do id like to avoid dealership prices etc
Super Member
Joined: Oct 2020
Posts: 662
Likes: 279
From: ILLINOIS
2014 E63S
Just make sure this applies to your vehicle. You can check the fitment guide
KIT-2761560790KT
MER-2769051000
Last edited by Mojo20032004; Nov 3, 2022 at 11:15 AM.
Super Member
Joined: Aug 2018
Posts: 697
Likes: 172
From: Seattle, WA
2019 M5 Comp, 2005 Ariel Atom 2
Also the sacrificial harnesses if you want them too. FCP's fitment guide won't show them for an M157 car but they do fit the cam magnets on our cars (not the sensors though), fairly inexpensive extra insurance and makes checking them a little easier.
https://www.fcpeuro.com/products/mer...des-2711500156
https://www.fcpeuro.com/products/mer...des-2711500156
MBWorld Fanatic!
Joined: Dec 2003
Posts: 6,279
Likes: 58
From: OC
i drive them all, fast and hard
Super Member
Joined: Aug 2018
Posts: 697
Likes: 172
From: Seattle, WA
2019 M5 Comp, 2005 Ariel Atom 2
MBWorld Fanatic!
Joined: Dec 2003
Posts: 6,279
Likes: 58
From: OC
i drive them all, fast and hard
Super Member
Joined: Aug 2018
Posts: 697
Likes: 172
From: Seattle, WA
2019 M5 Comp, 2005 Ariel Atom 2
Funny enough I noticed more of an improvement replacing the commonly worn vacuum pump check valve diaphram on shifting and low end power, and it's a $20 part, so go figure!
Senior Member
Joined: Sep 2011
Posts: 302
Likes: 11
From: CA
E63 M157
Junior Member
Joined: Apr 2020
Posts: 48
Likes: 13
Cls63 s-amg 2014
I replace 4 cam sensor and 4 cam solenoid after a month i find oil in injector plug and knock sensor plug i wondering from where this oil come from and i find all this oil come from oil pump solenoid i replace it at dealer now no more oil in all harness keep your eye on it or you will destroy the ECU
Super Member
Joined: Aug 2018
Posts: 697
Likes: 172
From: Seattle, WA
2019 M5 Comp, 2005 Ariel Atom 2
No it's super easy, just one bolt. Vacuum pump is at the rear of the engine on the drivers side, there is a valve with a single T-25 bolt and a vacuum line attached to the nipple. Remove the vacuum line (carefully as they get hard over time), remove the bolt, and VERY carefully remove the check valve. I say this because if you drop and lose the plastic ring that holds the rubber in the middle of the valve then you can't reinstall (and it's small and easy to drop, I recommend a rag underneath it as you extract it). Sometimes it stays behind in the hole so just carefully get it out with a pick or thin needle nose pliers.
If you do lose it, you can get whole replacement valves but only from overseas (i.e. China) vendors so it takes a week or two to show up. Or, just order one (or two, they are $9 each) ahead of time before you do the work, lots of options on Ebay. More expensive ($20), but quicker to get, is just the rubber klifex vacuum piece (just search klifex rubber vacuum repair on Amazon, will show for Ford Ecoboost etc but it's all the same part), that only took a day to show up.
If you do lose it, you can get whole replacement valves but only from overseas (i.e. China) vendors so it takes a week or two to show up. Or, just order one (or two, they are $9 each) ahead of time before you do the work, lots of options on Ebay. More expensive ($20), but quicker to get, is just the rubber klifex vacuum piece (just search klifex rubber vacuum repair on Amazon, will show for Ford Ecoboost etc but it's all the same part), that only took a day to show up.
