> No new information on this but I noticed you guys were commenting on
> the need for old oil to be wiped out of the housing. The housing sits
> horizontal, so when you take the 'cap' off (if indeed that's what I
> gotta do) the oil is going to run out.
I don't know the configuration of your car's oil filter, but I have two BMW,
basically the same motor in both, and my cars use a cartridge-type oil
filter. The cap on the canister is different on both cars, but the canister
is essentially the same. The differences are an improvement to the design --
the new configuration is better than the older one.
In any case, the cap comes off of the can and the cartridge is removed. The
new cartridge comes with a couple of o-rings that seal the bolt, an o-ring
for the cap, and I think I remember a washer/gasket for the drain plug.
Your initial question was about the wrench you need, I think you will want
to use a socket wrench that actually fits the cap properly. As I understand
the configuration of your filter canister, the entire cap has a raised
section of flats that you have to turn to spin the cap off. One of my cars
has this design, the other has a bolt that passes all of the way to the
bottom of the canister. On one, I remove this long bolt then take the lid
off, on the other I unscrew the lid and remove it.
Both are pretty good designs from the perspective of controlling the mess
that comes from taking the filter off. But, in the BMW configuration, the
canister is mounted verticle, so the lid comes off and the element comes
out, and any oil that remains is in the canister, not running down the side
of the block to make a mess on the floor.