Sunday I got up early to work on the CRD. It was about 38 degrees, so I played video games until noon then headed out. When it was a balmy 45 degrees. The mission was replace the MAP sensor and the oil drain on the turbo. I have not reinstalled the engine covers yet, so the MAP sensor took about a minute.

The oil drain tube came out pretty easy, maybe 20 minutes - mostly of that spent removing the intake tract. Here's old solid one & new flexible one if anyone cares:

Note that the flange on the old one is actually movable - there is a lip on the tube that mates to the turbo flange, and then a collar that holds it in place. IT'S AN IDIOT DESIGN. Garrett put a flange on their turbos in the 1970s and I have never, ever had one leak. But VM Motori decided to reinvent the wheel and, surprise, it leaks. I HATE when things have zero issues are changed to things that have issues. Drive me up the wall. The new design is the old design all over again. Grrr.
Install took about an hour - there is very little access and getting the gasket straight was difficult, but ultimately not a big deal. A small amount of Earl's Hose Assembly Lube and the tube slid right into the grommet. I used a long bolt on the "inside" (where I couldn't see) to get the gasket aligned, installed the "outside" bolt, removed the long bolt and put the right one back in. Whole operation took maybe an hour and a half, not a big deal. Not removing the elephant hose would have made it really, really difficult.
The test drive was... disappointing. The CEL is now off, but it's still leaking oil all over the place - even worse, and that is actually a good thing. The leak has been slight enough that tracking it down is difficult, but this time the entire front of the bellhousing adapter on the passenger side was soaked in oil. Like,
soaked. I bit the bullet and removed all the heat shields around the turbo and I
think I may have found the source - the oil gallery plug I previously suspected. With everything out of the way, I could feel pretty far behind the head and it seems dry(er) back there. I think high-pressure oil might be squirting from under that plug onto the adapter, where gravity and air blow it across the back of the motor. *Most* of the oil goes down the passenger side, but some goes down the middle and a tiny amount makes it over to the driver's side. I think.
It was not fun to remove, but a 6mm allen socket, a u-joint, and a long extension at least allowed me to work up top. If you've never seen it, it like an oil drain plug and has a similar copper sealing washer. Unfortunately I didn't have anything approximating the washer, so all I could do is clean it up and reinstall. I did put some high-temperature thread sealant on the threads - hopefully between that and a retorque it's solid. It was 6pm at that point, pitch black and probably 42 degrees out so I went in without a test drive... I guess that will have to wait until next weekend.
A couple questions:
1. Is the plug *supposed* to have a crush washer? I ask because the top of the threaded section has a bevel to it that looks like it's either supposed to seal directly against metal or *maybe* have an o-ring.
2. Does anyone know the size & thread of that plug? If this doesn't work, and it's really supposed to have that crush washer, I may just replace both plug & washer.
3. When removing the upper turbo heat shield, I found it was cracked where it mounts to the turbo. I think the two bolts on the manifold are enough to hold it for a while, but eventually it will probably fail entirely. Anyone have a part number or a source?
I'm more hopeful than I was this time last week!
