I lost one of two threaded spacers that take the place of collar screws on crank caps one and two, and which the oil pump mounts to. 3 weeks from Germany later and I was able to install the new oil pump today. It’s a new OE RWD M62 pump, which really means that the pickup is much shorter siince the RWD oil pan isn’t nearly as deep as the AWD x5 4.4 pan.
Note that I used blue thread locker on all the fasteners.
Collar screw/spacer went in…torque to yield per TIS:
Then the pickup tubes from the x5 pump (they are identical), with new o-rings:
Pump goes on next and the nuts on caps 1 and 2 are torqued down:
The chain and sproket for on next and are toqued to 45 NM. This is a bit awkward since there is no where to put a wrench on the pump shaft to hold it while the nut is torqued. I ended up using a heavily padded pry bar on a crank counterweight, which seemed to work ok.
The chain is adjusted to 1 cm of play, plus/minus 2mm by using am 8mm Allen wrench on the threaded insert inside the remaining mounting point (on the right side of cap 1). This is a bit tricky as there is very little room to get any leverage from a normal Allen wrench, so I was eventually able to work a hex socket in and get a long extension on it. I needed to take out perhaps 5mm of slack and it took maybe a 90 deg of turn on the spacer.
Once the tension was set, a bolt holds this final corner of the oil pump down.
Finally the sprocket cover goes on with 3 nuts at 10NM and a little thread locker.
I’m not sure why the x5 pump doesn’t have the chain/spocket cover but the RWD M62 pump does.
I need to the the motor on a stand now so I can install the pistons so I’ll mount the oil pans temporarily and move the whole thing down to the Garage I belong to before it gets too heavy to move easily. I can also temp mount the OSV oil return hard-line that carries the separated oil back down to the pan. It needs to be shortened so I can use this X5 (exterior OSV) setup rather than the 540, etc. setup where the OSV is under the timing cover. The X5 hardline ends in a banjo bolt at the back of the pan, but my current thinking is to cut the hardline shorter and see if I can get an AN fitting welded to the line and to the pan at an appropriate spot on the RWD pan I got off of EBay.
Since I’m pretty sure I want to build a track car with this motor, a dry sump solution would be best and make for an easier install no matter what car I build. Unfortunately they are simply too expensive, so I am going to do some research on how I might add some baffles around the pickup tube, in the lower sump to keep the sloshing down. I think the e36 and 46 guys have a similar solution.