Scary oil leak

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   Did I say that my MPG has dropped gradually in past months, it has been above 35 (London traffic condition most of the time) and but currently it is just above 31. Maybe I am testing turbo's too much. 

Edited by afsar

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afsar Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member II Joined: 25-November-2007 Status: Offline Points: 172	Post Options Post Reply Quote afsar Report Post Thanks(0) Quote Reply Posted: 25-March-2011 at 16:57
	Did I say that my MPG has dropped gradually in past months, it has been above 35 (London traffic condition most of the time) and but currently it is just above 31. Maybe I am testing turbo's too much. Edited by afsar

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Sporty1 Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Joined: 18-October-2006 Location: Hertfordshire, United Kingdom Status: Offline Points: 2297	Post Options Post Reply Quote Sporty1 Report Post Thanks(0) Quote Reply Posted: 25-March-2011 at 17:10
	The hoses changed appear to be vaccum hose that control the turbos wastegates and therefore boost levels.
	Sport Evolution Schwarz #043

afsar Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member II Joined: 25-November-2007 Status: Offline Points: 172	Post Options Post Reply Quote afsar Report Post Thanks(0) Quote Reply Posted: 28-March-2011 at 22:59
	Today I managed to get a glimpse of leak as car was lifted up for wheel caster problem repair at a bodyshop. Here is how bad it looks: Oil all over the place on the tray. Btw. I read on forums that you can replace this with better silicon pipes which are a bit better than the BMWs. Do you guys know where to get them from. All set to get this sorted coming weekend or next week.

Sporty1 Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Joined: 18-October-2006 Location: Hertfordshire, United Kingdom Status: Offline Points: 2297	Post Options Post Reply Quote Sporty1 Report Post Thanks(0) Quote Reply Posted: 29-March-2011 at 10:20
	^^^ Yes, that is what it looks like.............. Silicone hoses would probably be from someone like Samco, I would guess, but not heard of that.
	Sport Evolution Schwarz #043

afsar Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member II Joined: 25-November-2007 Status: Offline Points: 172	Post Options Post Reply Quote afsar Report Post Thanks(0) Quote Reply Posted: 29-March-2011 at 14:23
	I enquired with BMW parts today and they told me that I can buy seals separately if hose is not split or damaged. Looking at the pictures above I didn't see any damage to the hose itself, it is just covered with oil, that too comes from the top. Looking at the part catalog it is evident that upper seal part number was changed from March 2009. Previous part number was 11617801974 updated with 11618506786. There were no other changes to any other component of this hose. I have ordered both the seals to be on the safe side and will get them replaced first. Looking at the underside of the car it was not looking too big job if you can do it from below. Has anyone tried DIYing it before. btw. leaking oil is one problem but why so much oil there is another one, ideally from my (limited) knowledge only dry air should flow from those pipes, why so much oil will be present in the first place. Any idea? I am pretty sure if this leak is fixed oil will be running along the pipe in the intercooler and then back up to the engine, is that not a problem? I could see oil (relatively less) on the other side of intercooler pipe connection too which I believe is coming from the leaky red pipe. Edited by afsar

Sporty1 Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Joined: 18-October-2006 Location: Hertfordshire, United Kingdom Status: Offline Points: 2297	Post Options Post Reply Quote Sporty1 Report Post Thanks(0) Quote Reply Posted: 30-March-2011 at 09:09
	From the link I posted up on page 1, this pretty much expalins it.
	Sport Evolution Schwarz #043

afsar Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member II Joined: 25-November-2007 Status: Offline Points: 172	Post Options Post Reply Quote afsar Report Post Thanks(0) Quote Reply Posted: 01-April-2011 at 17:18
	Having read 'a lot' of forum I have got some idea about this problem BUT this (I mean oil leak from the red hose) would not cause lower rev turbo problem; however if the hose is split (totally gone) then the car will be undrivable and would hardly go above 60mph. Getting this leak sorted is necessery but looks like I have more then one problem. I will fix this one first this weekend and see what difference it makes and then move on to the next bit. According to the various thread floating on various forum small turbo problem could be a) Stuck actuator b) Non-functional valve c) Vaccum hose pipe(s) Want to get this fixed before my europe trip starting coming long weekend.

afsar Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member II Joined: 25-November-2007 Status: Offline Points: 172	Post Options Post Reply Quote afsar Report Post Thanks(0) Quote Reply Posted: 02-April-2011 at 19:32
	Today I managed to replace the seals on both the side of this pipe. It was moderately difficult DIY for me. I think this is must for all 335d and 535d owners to check their intercooler hose and replace the seals (or hose if hose is split) because so many of these bi-turbo engine suffer from leaky hose problem. It should have been a recall ideally. Here is the link for the DIY I have posted. All you need is a ramp so that you can reach the pipe from under the car and most tricky bit is to remove the top (turbo connection) end of the hose which took most of the time for me, otherwise it was all simple. Drove the car for appx. 10 miles after finishing DIY and it 'seemed' turbo lag isn't there anymore; or atleast has reduced quite a lot. I can't confirm this 100% yet as it could be just in my mind; I will drive it for some more time and then report back. No oil leaking yet but it is too soon to conclude. If this leak continues there isn't any option left but to change the whole pipe, there is no way any other (aftermarket or silicone) pipe will fit replacing this one unless heavily modded which IMO isn't worth it because of too much work involed. Biggest problem is reaching those hose end, intercooler side is easily reachable from underside but top end is bit difficult but still doable that too only from underside. Not worth doing if you haven't got a ramp. Btw. gave a visit to halfords today and saw a lifting kit for �45, not a bad deal considering just the ramp doesn't come less then �20-25 on its own. I am not sure on the quality though. I didn't use this as I had a ramp but if I didn't I would bought this. Edited by afsar

afsar Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member II Joined: 25-November-2007 Status: Offline Points: 172	Post Options Post Reply Quote afsar Report Post Thanks(0) Quote Reply Posted: 04-April-2011 at 00:10
	Noticed one of the hose towards actuator is tightened by a cable tie! Not sure what kind of hose is this, it is wrapped in some sort of foil paper and it turns metallic and connected to the exhaust: Is this how it is suppose to be?