[LukasL]

Hi!

I have an oil leek from both “J hose” (distributor to small turbo) and the longer one which picks up oil from the engine block. I’ve now got the J hose and will replace, but is there anything I need to think about when doing it? Should I for example put some oil in the hose after swapping it or will the small turbo have some oil left? Anything else? It’s the “02 oil pipe” I’m talking about. Cheers!

Also, what causes these to leak? Is it simply that they are old and worn, or could it be related to some sort of oil pressure issue?

[lnxguy]

Make sure you change the crusher washers. The turbo will still have oil in it, you'll be fine. No need to worry.

[BB_cuda]

Fair warning tgat changing the longer supply hose is more of a hassle. It is sort trapped between turbo and engine block. A old timer named Yozh wrote a thread here on those details of changing this longer hose.
On the oil priming question, I’ve never heard of anybody needing to do this. I changed the downstream J line and the other large turbo feed lines on both of our M57 and didn’t do this and was fine.
If you can do it and not loose the new oil trying to rehook it up, more power to you.

[LukasL]

Originally Posted by lnxguy

Make sure you change the crusher washers. The turbo will still have oil in it, you'll be fine. No need to worry.

Originally Posted by BB_cuda

Fair warning tgat changing the longer supply hose is more of a hassle. It is sort trapped between turbo and engine block. A old timer named Yozh wrote a thread here on those details of changing this longer hose.
On the oil priming question, I’ve never heard of anybody needing to do this. I changed the downstream J line and the other large turbo feed lines on both of our M57 and didn’t do this and was fine.
If you can do it and not loose the new oil trying to rehook it up, more power to you.

I swapped it without any problems, I actually disabled the fuel and let the starting motor build up some pressure for a few seconds just to be sure. It’s leaking less now at least, I might swap the longer supply hose in the future, but just like you said I could tell it will be a hassle to swap so for now this will do. Thanks