What is the chance anyone here knows what the thread size is on the turbo oil line feed coming off the block?

Also does anyone know if the blocked off port next to the turbo oil feed is a water port?

I am sorry I don't have an answer. But, I started to want to know info on threading and I used the Thread Gauge from the Cheapie Tap set I bought. Then I found Mercedes uses finer threads on some applications an finally bought a more complete Thread Gauge that had all the Metric/SAE thread sizes. I think it was a good investment for the $11 I paid for it.

That and something to measure the outside diameter of the threaded area. A 6mm Bolt will have very close to 6mm OD. Close enough that you will not be mistaken.

Not on replacing the Turbocharger Oil Supply Line. On the 617s ForcedInduction has said there is a restriction in the line. Others have claimed that restriction s 2mm.
I mention this if you happen to be replacing the Stock Oil Inlet Line.

__________________
84 300D, 82 Volvo 244Gl Diesel