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Old 30-07-11, 22:12
moorbarr moorbarr is offline
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T4 Post Icon back of engine diagram

has anybody got a diagram of the back of the engine area.i have a small oil leak coming from a pipe thats connected with two bolts to the top of engine block/turbo but i dont have a clue what it is.its just above the exhaust manifold and drips onto it creating a burning oil smell.it eventually works its way down the back and onto sump tray.

i need to work out what it is so i can replace the gasket or whatever is needed.i spotted it when it was up on a friends ramp.

hope someone can help
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  #2  
Old 30-07-11, 22:50
RaCiNg SnAkE RaCiNg SnAkE is offline
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Default Re: back of engine diagram

Do you have a 2.5tdi? If so, and the pipe connects to the turbo itself, then this is your oil return line. There is a paper gasket there that can be replaced.

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Old 31-07-11, 08:04
moorbarr moorbarr is offline
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Default Re: back of engine diagram

yeah sorry forgot to say what the van was.its a 2.5tdi.

from researching here i narrowed it down to been that pipe but just wasnt sure as some say its connected to near the oil dipstick but this is higher up.i would imagine this is a beach to replace.can it be only accessed from the underside via a ramp or can it be got at from the top?
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Old 31-07-11, 21:48
RaCiNg SnAkE RaCiNg SnAkE is offline
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Default Re: back of engine diagram

Are you referring to part number 9 in this diagram:
http://www.wagenstad.com/index.php?m...&page=1-145-45

The bottom of the pipe is connected to near to the base of the dipstick tube. The top of the pipe is connected to the underside of your turbo. The hose is flexible, so if you can get a socket/allen key under your turbo, you should be able to replace the gasket from the top.

Easier said than done though as space is a bit tight round there.

Have you checked to see if the bolts just need tightening up?

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Old 01-08-11, 17:44
moorbarr moorbarr is offline
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Default Re: back of engine diagram

im pretty confident thats the part.could this create a steady drip of oil if gasket is gone?its more noticable after longer journeys.
thanks so much for the diagram, no harm in trying to replace the gasket if i can but i might try and tighten first and see.unless they were over tightened.the head was of the van earlier in the year and since that big job this leak has developed over time.
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Old 02-08-11, 00:50
RaCiNg SnAkE RaCiNg SnAkE is offline
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Default Re: back of engine diagram

The Wagenstad website is great for looking at exploded parts diagrams

I would say yes.

Mine developed a leak from there and when I took it apart to find out why, there was no paper gasket there at all, just some old liquid sealant that had obviously been used a bodge repair in the past. It must have sealed it to begin with, but over time it deteriorated and started to leak again.

Definitely worth trying to replace gasket as it doesn't cost a lot.

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Old 07-08-11, 18:27
moorbarr moorbarr is offline
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Default Re: back of engine diagram

got hold of a new gasket.was having a look today at accessing it from the top.i think its going to be too hard.its tucked right up in behind turbo.do you think it propped safely on axle stands that i could access it from underneath.?there is quite a bit of oil on the underside, but i suppose over time it will build up on belly pan and blow all over the underneath.also when i undo the pipe, will it contain oil or not?i hope i can get this sorted myself.
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Old 07-08-11, 18:59
RaCiNg SnAkE RaCiNg SnAkE is offline
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Default Re: back of engine diagram

To be honest, I don't know if you could get to it from underneath. You're going to need pretty long arms!

Can you not get to it if you remove all of the pipework from the air box to the turbo?

The pipework will contain a small amount of oil, but nothing major. Just be careful you don't get any crud in the pipe when you undo it. Keep it all nice and clean.

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Old 07-08-11, 19:04
moorbarr moorbarr is offline
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Default Re: back of engine diagram

yeah i had a look at that route.maybe ill give that a try.the distance underneath was my main concern and think you maybe right.ill undo as much as possible on left side and try get in around that way.
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Old 07-08-11, 20:22
mr-torquer mr-torquer is offline
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Default Re: back of engine diagram

Good Luck
I did mine last year. I stand the van on a pair of old steelies as axle stands and removed the Drive shaft extension mount housing for easier access.

2.5TDi with a fridge full of Beer.
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