Ricardoa1

Hello All,

Has anyone been running the oil pump solenoid disconnect mod? It supposed to help with lubrication and prevent the solenoid from sticking in a closed position and prevent catastrophic engine failure. It will throw a soft code but no DTC. Does anyone know if the readiness monitor will show ready for the environmental testing. Planning on unplugging it soon.

Ricardoa1

Nobody knows what im talking about?

mtm

I remember Tasos mentioning that there is a difference between the current oil pump and the old ones, which didn't have the solenoid control. So without any long term data to compare, it is not known whether or not the current pump is strong enough to run full time on full volume. Just something to consider.

Other than that, I don't see any harm in unplugging the sensor. If no DTC is thrown, I doubt the error will show up in the inspection process, especially since MB itself deemed the sensor malfunction unimportant.

W205C43PFL

Hmmm, if I recalled correctly, this was discussed in the oil pump solenoid thread but I don't remember which post.

Ricardoa1

I hope if deemed by MB unimportant that there is no detrimental issue with the pump running unplugged. Technically the pump has the same torque input from the engines rpm, it probably works more restricted if the solenoid is closed during low demand. But one less headache to worry about, catastrophic at that, seems to be worth the prevention. One could question reconnecting the harness and how that will affect the plunger if it has not moved for a while, might be sludged up to become functional and prone to sticking so maybe best to just continue to leave it unplugged?

steh-fan

There is an interesting video on this topic:

I'd love to hear, too, whether here anybody tried it.
The comments under the video at least indicate good results.

W205C43PFL

There is quite a discussion in the other thread with multiple test and discussion on different scenarios, it is currently 54? pages long so it is quite a read. I am still catching up since I was absent on the forum for a couple months.

W205C43PFL

Yup this was posted on the other thread and by a forum member here.

arsupisemnet

You can disconnect it, wont affect solenoid. Will save your camshaft for sure.

Ricardoa1

Did an oil change and removed the engine belly shield which gave me access to the connector. I unplugged it and have put about 500 miles on it. Happy to say no lights came on, I got to check the scanner to see if all monitors are pass/ok at this point. I did not notice a difference, I know a few folks felt a difference when doing it. But peace of mind is good enough for me. Hopefully things last longer like this.

W205C43PFL

Hmmm, strange you didn't notice any differences, assuming the oil pump solenoid related code is stored and you saw it with the scanner confirming you unplugged the right one?

Ricardoa1

Yeah I hope I pulled the correct one, I don’t see codes on the cheap $20 dollar scanner, and all readiness monitors are in Ready/OK status so no ill effects.

the connector was near he crank pulley bottom left if facing the engine.

OldManAndHisCar

Just read the thread in the W212 E63 forum...it's only the longest thread on this forum

W205C43PFL

That might be it.

True