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you can also inspect your engine bay every now and then and look for these leaks yourself... if a sensor leaks, it needs to be replaced because it will die soon anyways.
There are also easy ways to insulate the loom near the connector that involve cheap glue gun and/or high-temp silicone. Why on earth would I need these plugs - it does seem a bit an overkill for a problem they address.
Does this effect the V6 engine in the S550e bi-turbo, I know I am the read-headed step-child but that is my ride
I am not sure but if you have the same part #s for cam phasers and cam sensors, then I would proceed the same way.
Originally Posted by amgs63dxb
you can also inspect your engine bay every now and then and look for these leaks yourself... if a sensor leaks, it needs to be replaced because it will die soon anyways.
There are also easy ways to insulate the loom near the connector that involve cheap glue gun and/or high-temp silicone. Why on earth would I need these plugs - it does seem a bit an overkill for a problem they address.
Please elaborate; I haven’t heard / read of this before.
I looked at my car and see the wires to the devices in front descend from the top of the valve covers. So are we saying leaking oil could travel upwards through the sheathing and then threaten the electronics? Is the presence of the sheathing what creates the potential for oil to travel back through the harness to the computer or other trouble spots?
It looks as if one could just remove the last couple inches of the sheathing above the connectors and that would not only reduce the potential for oil to travel up under the sheathing, it would also make any such leaking easier to see.
Word about thus from my mechanic-
Yes but we have found it’s not coming from can magnets like he said. At the dealer, among all of us technicians, we have found that the oil is feeding into the harness from the cam sensors, which is a different part than what he is showing. We have also only found it to be really bad on the 276 engine and the 278 engine. I believe your white S class has the 278 engine in it. Your other cars are not affected by this. What I suggest is at around 80,000 miles we replace the cam sensors.
I pulled and checked each of these connectors this afternoon and all were dry. The cam position sensors are held in place by one T30 bolt and come out easily. I pulled each one out, looked it over and put on fresh o-rings since I had them out.
I did notice the pigtails are different; on my car the solenoid/magnet connectors have two wires and the cam position sensors have three wires.
Word about thus from my mechanic-
Yes but we have found it’s not coming from can magnets like he said. At the dealer, among all of us technicians, we have found that the oil is feeding into the harness from the cam sensors, which is a different part than what he is showing. We have also only found it to be really bad on the 276 engine and the 278 engine. I believe your white S class has the 278 engine in it. Your other cars are not affected by this. What I suggest is at around 80,000 miles we replace the cam sensors.
Looks like he shows both Cam Magnets and Sensors. Did I miss something?
So if I’m buying the extensions am I buying (8) total? (4) For the Cam sensors and (4) forthe solenoids but they’re all the same extension? (8) of thesehttps://www.fcpeuro.com/products/mercedes-engine-harness-genuine-mercedes-2711500156
you just need 4 of the sacrificial harnesses. 2 on each side. It's simply an extension between your current harness that makes it harder for the oil to reach the solenoids and cause damage. I installed them last week and it took 15 mins.
you just need 4 of the sacrificial harnesses. 2 on each side. It's simply an extension between your current harness that makes it harder for the oil to reach the solenoids and cause damage. I installed them last week and it took 15 mins.
2016 S550 sport, 2018 GLC300, M3, Zo7, 2021 Sierra Denali
Originally Posted by Rmayrap
you just need 4 of the sacrificial harnesses. 2 on each side. It's simply an extension between your current harness that makes it harder for the oil to reach the solenoids and cause damage. I installed them last week and it took 15 mins.
Now I am confused. There are 4 solenoids on the face of each head valve cover area?? Thats 4 extensions right there. Then then are the cam sensors on top 4 in total? That would be 4 more harnesses?? 8 total??? Are this interconnected and only need them on 4 specific places?? Thanks
2016 S550 sport, 2018 GLC300, M3, Zo7, 2021 Sierra Denali
I just watched the video I posted again and at the 5 min mark he does state the cam sensors on top are a secondary possible leak point. The primary leak is mainly the 4 solenoids in front but the cam sensor "can" also leak, they take the exact same sacrificial harness. So to be completely insured from this oil wicking problem it appears the M278 needs 8 of these harnesses. Yes, no? Opinion?? Thanks
2016 S550 sport, 2018 GLC300, M3, Zo7, 2021 Sierra Denali
Thanks buddy!! As he stated in the video they are all the same harness. His message states no option for cam sensors but video says they are the same. So 4 per side to be safe!
They are NOT the same harness. The cam sensor and cam phaser use different harnesses. You need (4) can phaser harnesses (2-wire) and (4) cam sensor harnesses (3-wire). Please click on the original link for more information. You cannot buy the cam sensor pigtails from MB - they do not make them.
The FCP Euro video is WRONG - they are not the same harness. Ask me how I learned!!
Took a moment to check out one of my cam sensors and well... let the picture speak for itself.
Only thing I can a bit annoyed that i did was I broke a clip on the harness (right side of the yellowish piece) so I took a small piece of electrical tape and wrapped it around the cam sensor and pushed it back into the harness since a small clip that holds it broke so ill have to add this to the list.
Now I am confused. There are 4 solenoids on the face of each head valve cover area?? Thats 4 extensions right there. Then then are the cam sensors on top 4 in total? That would be 4 more harnesses?? 8 total??? Are this interconnected and only need them on 4 specific places?? Thanks
I didn't do the cam sensors on top, sorry for the confusion. I was mainly speaking for the kit from fcp euro for the solenoids. I don't think fcp euro sells a kit for the cam sensors.
02-08-2023 | 06:41 PM
