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JLRyall



Member Since: 24 Jan 2022
Location: Hampshire
Posts: 7
United Kingdom 1986 Defender 90 300 Tdi HT Barolo Black
Oil in pipe?

Click image to enlarge

Is there meant to be oil in these pipes around the turbo?
Post #939298 24th Jan 2022 10:16pm
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donmacn



Member Since: 07 Nov 2017
Location: Nth Scotland
Posts: 1829
Don’t know about “meant to” but it’s not uncommon.

If you follow the pipework you’ll see that on the inside of the bend in the big pipe in your photo, there’s a small pipe coming in from the rocker cover oil cyclone. This is how any crankcase pressure is fed back to the air inlet side - along with a healthy dose of oil as the cyclone may not be working as well as it should if at all.

They are cheap to replace with OEM, or more spendy to replace with something bling. A more complicated ‘fix’ would be a ‘catch can’ - you can search on here for an explanation to that.

Probably thousands of Tdis running around with oil in that pipe and as long as it’s not truly excessive it wouldn’t really matter. Donald

1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong
(The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html )
2000 Range Rover P38 4.0L V8

in the past..
RR classic - fitted with 200Tdi
1984 RR classic - V8 with ZF auto box
1993 Discovery 300Tdi

not to mention the minis and the Type 2 VW camper...
Post #939319 24th Jan 2022 11:40pm
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8619simon



Member Since: 05 Nov 2016
Location: North Wales
Posts: 222
Wales 1995 Defender 110 300 Tdi CSW Epsom Green
Some light misting seems to be normal as the crank case breather feeds into the air intake to the turbo. If you have a lot of oil then no, not ideal.. would be worth checking the crank case breather is not all bunged up.

I would also check to see if you also have oil in the inlet turbo hose from the inter cooler to the intake manifold. Again a light misting seems to be normal but heavy deposits could be turbo seals.
Post #939320 24th Jan 2022 11:40pm
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8619simon



Member Since: 05 Nov 2016
Location: North Wales
Posts: 222
Wales 1995 Defender 110 300 Tdi CSW Epsom Green
donmacn wrote:
Don’t know about “meant to” but it’s not uncommon.

If you follow the pipework you’ll see that on the inside of the bend in the big pipe in your photo, there’s a small pipe coming in from the rocker cover oil cyclone. This is how any crankcase pressure is fed back to the air inlet side - along with a healthy dose of oil as the cyclone may not be working as well as it should if at all.

They are cheap to replace with OEM, or more spendy to replace with something bling. A more complicated ‘fix’ would be a ‘catch can’ - you can search on here for an explanation to that.

Probably thousands of Tdis running around with oil in that pipe and as long as it’s not truly excessive it wouldn’t really matter.


Ha beat me to it Thumbs Up
Post #939321 24th Jan 2022 11:43pm
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