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TUNINGBYAMG

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Hi guys,

Just wanted to share my experience with a 2nd Touareg I bought.
Was getting an oil leak from what seemed to be the right hand side (passenger) turbocharger. The leak also engulfs the rear side of the suspension arm and right side of underbody frame. I carefully examined where
the leak was coming from and it was dripping over it and leaking down making a puddle. I was like wait a minute, i checked my right hand side turbo intercooler and hoses and found there is no excess amount of oil to be worrying about a turbo failure. Usually a failed turbo leaks in, not out like this was. So i traced the leak to the gasket of the Right side tandem pump which doubles as vacuum and fuel in one unit.

These are the steps i took to get to it
1- Drain your oil from bottom oil plug
2- Remove oil filter and oil filter housing held by 4 bolts, then you can remove the right boost hose, the electrical flap and EGR valve of that right intake.
3- Remove coolant hose in front of thermostat housing so to drain just some coolant, not all
4- Remove oil cooler hoses for alternator and fuel
5- Take off clamps holding the fuel lines and remove all 4 at back of fuel filter (this assumes you have the dual fuel filter and not the 2006+ single unit) and take off the 2 bolts holding the fuel pod, all then comes off easy
6- Unplug right hand side glow plug harness, just pull as straight as possible on glow plug connector on each cyl = 5
7- Remove fuel rail bolts and unplug fuel hoses on it, pull straight again and it will come off
8- You can now remove the right intake as well
9- Now you will have sufficient access to get to the 2x 6mm Hex bolts holding the tandem pump and also 1 x 10mm screw, total of 3 bolts holding it. Use a mirror to see them if you need to or by feel/touch

If you look at the picture of the tandem pump, there is a small hole at the right side of it, this is the high pressure oil feed line coming at high pressure from the main oil pump, this is the culprit for the leak, it starts from there and makes its way past the metal gasket and on your turbo.

It takes about 4hrs, be patient and if you get stuck think things carefully before getting mad at the machine :)

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On the earlier 1.9 ALH TDI engines, it just so happens that a BRM (later 1.9TDI) oil filter oring is about the same size as the seal between the vacuum pump halves. Not sure if there is an analog for PD engines, but it certainly bears investigating!
 
I suppose that what we need to know is...
1. Diameter of the O-Ring material. Make sure that is does not vary along it's length.
2. Cut an old one and get the length, from that we get the diameter.
3. Sample of material, just in case.
 
...
These are the steps i took to get to it
1- Drain your oil from bottom oil plug
2- Remove oil filter and oil filter housing held by 4 bolts, then you can remove the right boost hose, the electrical flap and EGR valve of that right intake.
3- Remove coolant hose in front of thermostat housing so to drain just some coolant, not all
4- Remove oil cooler hoses for alternator and fuel
5- Take off clamps holding the fuel lines and remove all 4 at back of fuel filter (this assumes you have the dual fuel filter and not the 2006+ single unit) and take off the 2 bolts holding the fuel pod, all then comes off easy
6- Unplug right hand side glow plug harness, just pull as straight as possible on glow plug connector on each cyl = 5
7- Remove fuel rail bolts and unplug fuel hoses on it, pull straight again and it will come off
8- You can now remove the right intake as well
9- Now you will have sufficient access to get to the 2x 6mm Hex bolts holding the tandem pump and also 1 x 10mm screw, total of 3 bolts holding it. Use a mirror to see them if you need to or by feel/touch
...
Sorry to dig up an old thread, but am planning on tackling this myself soon and had a couple questions. Can those who have done this check the parts list and possibly give torque values for reinstalling the components?

Parts list:
tandem pump - 07Z145209D
tandem pump gasket - 070145215
fuel filters w/gasket - 18034-01190096
oil
oil filter
oil filter housing gasket - 07Z115441E
intake manifold gaskets? - 07Z129717A
Are there fuel rail gaskets?
Anything else?

torque values
pump bolts - ???
fuel canister - 10NM for cover, 5NM for bleed screw
air intake manifold - ???
Oil filter housing - ???
Fuel rail bolts - ???

Thanks!
-Nick
 
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