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  #1  
Old 23rd-September-2012, 12:23
zoolander's Avatar
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Location: Chatham, Kent
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Default Vacuum Hose Diagram

Following on from my problem the other week when my injector pump died and was replaced by a garage who managed to lose most of my undertray screws/bolts.

Since the injector pump was changed my car has a very loud whooshing/whistling noise when the turbo kicks in - wasn't like that before the garage did the work. I was going to buy the DPH set anyway so thought maybe this is a good time to do it. Fitted all the new hoses - old ones looked solid despite being very oily. All fitted correctly but noise is still there.

I'm certain it's a vacuum hose split or come loose but unsure of the routing of the hoses. Does anyone have a diagram where they go?

My car (TD4 2005) has done 101k miles, EGR bypass fitted for over a year, no loss of power, no smoke. Just much louder than it used to be.

Cheers all

Dave
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Old 23rd-September-2012, 14:29
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hd3 hd3 is offline
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Default Re: Vacuum Hose Diagram

Quote:
my car has a very loud whooshing/whistling noise when the turbo kicks in
that's almost got to be pressurised air escaping from the post turbo system ..
hoses / intercooler / manifold ..

or maybe from air being sucked in somewhere pre-turbo ..
i.e. apart from the air-filter opening ..
e.g. if the cover hadn't been re-fitted corectly ..
or the maf sensor wasn't sealed in place properly

Quote:
I'm certain it's a vacuum hose split or come loose
would not that effect the brakes vacuum servo ??
i.e. would not the brakes 'feel' different ?
( just speculating )
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Old 23rd-September-2012, 15:37
zoolander's Avatar
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Default Re: Vacuum Hose Diagram

yes brakes are not as sharp as before. Also since I did the EGR bypass Ive always had the buzzing duck noise (mentioned on this forum a few times) That noise has never bothered me, but since the garage had my car the buzzing duck noise has been greatly reduced to a very faint sound making me think vacuum pressure has been reduced.

Have already checked air filter when I fitted new DPH set all fitted ok.

Pouring with rain outside right now so cant really work on the the car - just trying to get some advice.

Thanks all
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Old 23rd-September-2012, 19:43
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hd3 hd3 is offline
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Default Re: Vacuum Hose Diagram

Quote:
Does anyone have a diagram where they go?
might be Similar to this : 'Layout of vacuum hoses ( bmw ) M47'
BMW TIS - 11 74 ... Layout of vacuum hoses (M47 / M57TU)

in that the Vacuum tank looks the same
( i've no idea what the pressure converters are on that )
there will be something connecting the vacuum pump to the v.tank ( i'm assuming )
from the tank .. there will be branches out to
egr unit / solenoid
brake servo
turbo vanes unit / solenoid
( i think that's all .. can't think of anything else right this moment .. might be wrong )
( googling didn't display any diagrams except that one .. on initial search)
no doubt it might be a right job finding the leak ..

~~~~~~~~~~~~~~~~

Quote:
Also since I did the EGR bypass Ive always had the buzzing duck noise (mentioned on this forum a few times) That noise has never bothered me, but since the garage had my car the buzzing duck noise has been greatly reduced to a very faint sound making me think vacuum pressure has been reduced.
score 1 for the 'duck' .. as an indicator of vacuum system health .. or lack of :-)

best of luck tracing the fault ..
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Old 24th-September-2012, 17:20
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Default Re: Vacuum Hose Diagram

Ive been looking around my engine bay today looking for air leaks and the only one Ive found so far is from a round hole on the right hand side of my air filter box - circled in yellow on the picture.

Is this meant to have something pluged in to stop air blowing out?

cheers all.
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vacuum-hose-diagram-td4air.jpg  
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  #6  
Old 29th-September-2012, 18:00
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Default Re: Vacuum Hose Diagram

On mine, that hole has a hose clamp clipped in to hold the rubber hose just below your yellow circle ( block it with gaffer tape )
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