td oil feed pipe

Post by **andysimpson** » 21 Apr 2006, 20:23

I am putting a AAZ is my van, i have moved the centre centre of the turbo to relocate the oil feed and return, i am using a JX manifold with my AAZ turbo, if i place the turbo inlet at 12 o clock there is no room for the feed pipe because of manifold, what angle are the factory oil pipes at mine looks like it need to be before 11 o clock to have a clearnace between pipe and manifold.

Post by **vantheman** » 23 Apr 2006, 07:44

Hi Andy.

I reindexed my turbo to about 10 o'clock to give clearance, have done
about 500 miles on new engine and no problems so far. I had to heat the
turbo body to get it to move so you need to predetermine the final
position before starting.

Vantheman

Converted panel van with ex Ebiza AAZ

Post by **andysimpson** » 23 Apr 2006, 10:00

I looked at a couple yesterday at bus types they seemed to be about 10 o clock. I have got the centre of the turbo turning was just worried about the angle of the oil pipes, a bit of bad engineering from vw there.

Post by **HarryMann** » 23 Apr 2006, 11:46

The angles are shown in the final piccies of the turbo re-indexing in Wiki Andy.. the oil inlet is normal to the exhaust flange, or the nearest set of bolts holes to that. The inlet can easily be slid around, but the photo shows the approx angle, I'll look for a better piccy..

Post by **HarryMann** » 23 Apr 2006, 12:03

Certainly for the JX manifold, this worked for me (just)... the more difficult fitment was the oil return pipe, as the outlet pipe's union had been soldered up, meaning I had to shim the copper washer so it just tightened sufficiently just at the correct angle.

The angle drawn looks slightly more than it really is - its very close to being normal to the exhaust flange face.

Makes me thirsty looking at the cuppa going cold

Post by **andysimpson** » 23 Apr 2006, 14:27

my turbo is different from yours, mine has the totaly different wastegate, i was just suprised at the angles of the turbo oil pipes, i have never seen that sort of angle on anything stock before now. Its as good as it can be now.

Post by **HarryMann** » 23 Apr 2006, 17:35

Got any photos of yours on file? I have another, slightly larger turbo, that I'd like to compare, but not sure if it's of an AAZ... biggest pain those oil feed-pipes, I've actually made a reflective heat shield for the oil feed IN pipe, as it's so close to the (red-hot) exhaust manifold. Ditto the compressor housing, which you can see in the photo, stood off about 1/8" and covered with highly reflective ally tape.

Post by **andysimpson** » 23 Apr 2006, 19:08

Post by **andysimpson** » 23 Apr 2006, 19:10

have you got any pics of the turbo cooling pipe fitted, i can't see how it fits.

Post by **HarryMann** » 23 Apr 2006, 19:33

As in water-cooling?

Is so, no, mine is an air-cooled...

That does look like the other one I've got, will have to go compare...

If you mean air-cooling blower pipe - mine's all missing, sorry... and don't intend to re-instate it, might build a deflector plate for underbody airflow.

You did well to get those set-screws out of the exhaust section - have a box of 100 stainless ones, if they're M10x12mm - prob. too late now!

Post by **andysimpson** » 23 Apr 2006, 19:53

HarryMann wrote:As in water-cooling?

Is so, no, mine is an air-cooled...

That does look like the other one I've got, will have to go compare...

If you mean air-cooling blower pipe - mine's all missing, sorry... and don't intend to re-instate it, might build a deflector plate for underbody airflow.

You did well to get those set-screws out of the exhaust section - have a box of 100 stainless ones, if they're M10x12mm - prob. too late now!

I meant the air blower thing, i have not got all of it but do intend on making it fit.

I put alot of heat on them first and they just un did as though turbo was new.

Post by **HarryMann** » 23 Apr 2006, 20:02

They don't seem to take long to get shagged on the syncros. All I can remember is the convulted floppy tube pointing roughly downwardsand inwards at the centre-section's fins on mine, but motor had long since given up the ghost - I'm sure they built it in for a good reason, to just dim down those peak temps to give the bearing section half-a-chance, but what a dog's dinner 15 years later!

Post by **andysimpson** » 23 Apr 2006, 20:26

HarryMann wrote:They don't seem to take long to get shagged on the syncros. All I can remember is the convulted floppy tube pointing roughly downwardsand inwards at the centre-section's fins on mine, but motor had long since given up the ghost - I'm sure they built it in for a good reason, to just dim down those peak temps to give the bearing section half-a-chance, but what a dog's dinner 15 years later!

I think it might have something to do with the inncorrect angle of the oil pipes, a small amount of oil is always going to stay in the turbo, this won't be a problem when engine is running as oil will be moving quickly, when engine is switched off there will be a pool of oil getting hotter because of the heat soak from the turbine, this oil will start leaving deposits around the bearing. The air blower would reduce temperature. The blower is also switched on by the same switch as the run on water pump which only comes on above 104 degrees.

Diesels turbo temps are normally very low compared to petrol turbos and i have never seen a blower on one of them, i have also never seen oil pipes at that stupid angle on one either. The turbine housing and bearing section of a beetle turbo i had used to glow bright red.

Post by **HarryMann** » 23 Apr 2006, 20:40

When you say stupid, do you mean not-vertical IN/OUT or so close to manifold... not taken enough notice in the past (not that I have one, of course, I'm an illusion really

)

The turbine housing and bearing section of a beetle turbo i had used to glow bright red.

Mmmm - hence my patented heat-shield technology - just in case I really get this thing fuelled up and going well

Post by **andysimpson** » 23 Apr 2006, 20:51

HarryMann wrote:When you say stupid, do you mean not-vertical IN/OUT or so close to manifold... not taken enough notice in the past (not that I have one, of course, I'm an illusion really )

The turbine housing and bearing section of a beetle turbo i had used to glow bright red.

Mmmm - hence my patented heat-shield technology - just in case I really get this thing fuelled up and going well

Both really, in the angle of the pipes means some oil always pools and the pipe next to the manifold is going to get very hot after engine is switched off. VW did have alot of problems with the routing of the turbo oil feed pipe on passat and a4, a6 1.8 turbos, oil deposits over time were building up in the pipe until it blocked causing the turbo to seize, the new pipes were re routed.