VW 3.0 TDI

[jmartin]

Ha. I knew you were going to ask about that oil. It’s dirt oil mix from what appears to be an old leak that traces up to the valley. I assume maybe a valley leak was repaired in the past or somebody was really sloppy with oil filter changes. No fresh oil leaking out anywhere besides the pcv at the turbo inlet we discussed earlier. I do suspect there might be a very slow leak from seal at the fuel pump drive belt sprocket which is at front of driver side head, but it also is directly below oil filler cap so it could be sloppy oil change spills.

Did not know about alternator clutch. Will take a look at it. Sounds like it should be replaced preventively? I need to replace serpentine belt with its tensioner and idler and same service on fuel pump drive belt.

Slowly working through all this stuff. It’s well below freezing here and my shop is unheated so things don’t get done as fast.

Regarding sensors. I sprayed the MAF with maf cleaner. Will replace the charge air pressure sensor and delta P for the DPF. Is it OK to use Bosch sensors or must be from VW?