Reply With QuoteHow may kilometres?
From memory I have replaced an intake elbow, came complete with clip and o ring. It was to rectify a similar leak.
TopicToaster
SubscriberSo after I thought this issue was once and finally resolved, it was back. Issue is the elbow/bend that’s held onto the throttle body with a metal clip keeps popping off ever so slightly causing an oil leak down the front of the engine, plus also slightly reduced performance.
Studying it in a lot of detail I found a few issues.
Firstly the plastic where the clip sits is worn allowing flex.
Secondly the section where the clip locates at the sides are slightly deformed from the stress of holding it in place, plus worn as above.
Thirdly the design itself is poor with the o-ring locating on the elbow barely millimetres past the installation chamfer. This means even the slightest movement of the elbow leads to a leak, even if the clip is still in place.
So now I know that, the appropriate fix is a new elbow and I’d also replace the locating spring clip. In the meantime however I’ve hooked up a cable tie arrangement you can see below.
It was hard to photograph however you can kind of see a bit of light above and below the spring clip. When you have it, you can see the movement would be enough to cause the clip to stay in place but still move enough to leak.
The final photo is clumps of oily residue on my accessory belt from this leak. Grrr.
2010 TDV6 3.0L Discovery 4 HSE
2007 Audi RS4 (B7)
ForumSage
How may kilometres?
From memory I have replaced an intake elbow, came complete with clip and o ring. It was to rectify a similar leak.
ForumSage
Just checked my records. O ring was a separate part. Clip came with elbow.
TopicToaster
Subscriber270,000km. Well overdue I’m thinking.Originally Posted by BigJon
2010 TDV6 3.0L Discovery 4 HSE
2007 Audi RS4 (B7)
TopicToaster
SubscriberBought a new “duct” as it’s known, but it’s the “elbow” 90 degree bit that bolts onto the throttle body. Mine had continuously cocked and leaked on the far side from the bolt, leaking boost and oil all down the front of the engine.
Looking at the old one I found a crack in the unit where the spring sat allowing more movement, plus wear on the metal spring and plastic housing - all adding up to it moving and leaking.
New unit so far is holding firm. That said, NOTE: there is a workshop mod to all new elbows/ducts. You need to shave the corner off the unit - a strengthening line that clashes with the coolant hose. An ex- Land Rover mechanic told me about the mod they all do.
See in the photo below.
2010 TDV6 3.0L Discovery 4 HSE
2007 Audi RS4 (B7)
Master
I have this same problem , I have just done 400ks of very rough roads / corrigations and noticed the oil leak onto the side of the Y piece and I reckon my fuel economy has suffered but hard to tell on that .
when I get back home I will need to doa something similar or do as you did and buy new. Car is 2008 with 170k . I have made it a regular service job to remove the Y piece and clean the gunk from it so maybe the repeated remove / replace has worn the clip and the plastic .
Looks like another wonderful choice of plastic component from the D3 engine design team.
bulletman
TopicToaster
SubscriberJust replace it. Mine has never come apart since replacing it. Previously it was always blowing off.
2010 TDV6 3.0L Discovery 4 HSE
2007 Audi RS4 (B7)
Master
Did you buy local or have source from UK.
Bulletman
TopicToaster
SubscriberLocal. $121
2010 TDV6 3.0L Discovery 4 HSE
2007 Audi RS4 (B7)
Master
Thanks , I need to investigate further but the edge of my fan blades have slight damage where they line up with the top corner of the duct. I am not sure if the whole radiator assembly has moved as well , there seems to be a lot of play in the radiator mounts on the top 34FB8DE5-CAD1-4774-A986-5973AC3D0E8E.jpg
Hard to see but you can just see where the blade has slightly touched , and it’s on every blade
bulletman
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