[wingerred]

My 2011 135i was recently diagnosed at just under 61k miles with a leak from where the bed plate and engine block meet. I was quoted $5,800 by my indy for the repair. I've had a lot of trouble finding any information about this type of leak. The car lost about .5 quarts over 6 months and 5,000 miles, so it seems pretty slow (for now). I'm just trying to figure out how to proceed. Car has no mods on it. I've sent an email to BMW NA, and I also have an appointment at the deal in a few weeks to get the airbag recall done.

[Bimmer_Boost]

Originally Posted by wingerred

My 2011 135i was recently diagnosed at just under 61k miles with a leak from where the bed plate and engine block meet. I was quoted $5,800 by my indy for the repair. I've had a lot of trouble finding any information about this type of leak. The car lost about .5 quarts over 6 months and 5,000 miles, so it seems pretty slow (for now). I'm just trying to figure out how to proceed. Car has no mods on it. I've sent an email to BMW NA, and I also have an appointment at the deal in a few weeks to get the airbag recall done.

What are you referring to when you say bed plate?

[wingerred]

The bottom half of the block that is attached to the crankcase.

[wingerred]

1 OIL PUMP
2 OIL RETURN DUCTS , INTAKE SIDE
3 BEDPLATE
4 OIL DEFLECTOR
5 INTAKE MANIFOLD WITH OIL SCREEN FILTER
6 OIL RETURN DUCTS , EXHAUST SIDE

[Weehe]

So oil pan?

[Bimmer_Boost]

Originally Posted by Weehe

So oil pan?

Must be the oil pan gasket.

[wingerred]

The leak is coming from above the oil pan gasket where the 2 pieces of the block (crank case and bed plate) come together. The leak is not coming from the oil pan gasket. The dealer diagnosed an oil pan gasket leak and an oil filter housing gasket leak about six months ago. I brought it to my indy and they cleaned it up and said to come back to verify the leaks. There is no leak on the OFHG and the leak below the motor is coming from above the oil pan gasket. I will probably get a second opinion since I really can't find more than a couple of mentions about this kind of leak when searching, and the repair quote is so expensive.

[juld0zer]

Bit of a strange one because the bedplate is glued in place with Loctite 5970 adhesive sealant from memory. I might be wrong.

The turbo oil return bung is close by. What I'd suggest is thoroughly clean the entire engine and apply a dry powder type spray all over suspect areas. Dealers have a specific aerosol for this. If the leak is really bad, it should be reproduce-able with a 15min hard drive around the block to heat up and get all fluids up to maximum operating pressure. I wouldn't suggest going for a longer drive because you want to pinpoint the origin, not verify the existence of a leak.

[MarkN54]

Originally Posted by wingerred

My 2011 135i was recently diagnosed at just under 61k miles with a leak from where the bed plate and engine block meet. I was quoted $5,800 by my indy for the repair. I've had a lot of trouble finding any information about this type of leak. The car lost about .5 quarts over 6 months and 5,000 miles, so it seems pretty slow (for now). I'm just trying to figure out how to proceed. Car has no mods on it. I've sent an email to BMW NA, and I also have an appointment at the deal in a few weeks to get the airbag recall done.

Hey man having the same issue i replaced the gasket for the ofh and i replaced the VC at the same time and t he car is leaking like crazy very similar to your problem you had did you end up finding the issue ? im stuck with this problem havent driven it in 2 months its making me go crazy

[juld0zer]

OP, any updates on this?
How are you measuring the 0.5qt loss over that period of time? Through the sensor or draining and measuring?