Hi, To all the experts out there. I have been reading up about the dreaded overboost, which seems to be the problem with my Elegance 110 TDI. Well I have taken the plunge and removed the turbo. Both the turbo and inlet manifold/ EGR valve are all gunged up. The question I would like to ask is :- When I removed the top and bottom oil feed pipes to the turbo, absolutely nothing came out. Is this normal or does anyone think that there may be an oil flow problem. Obviously I am concerned that when refitting there may be no oil on starting the engine. Comments greatly appreciated.

Thanks in advance.

The thin black pipe from the front of the engine is the supply pipe, and the very short braided one is the return supply.

How does the turbo seem? I would imagine if it ran with no oil it would be knackered.... and that as you actually have the unit in your hands it might be possible to tell? I am not sure of the specific symptoms of running a turbo with no oil supply, but I suspect either google, or someone else on here could suggest something.

if you're doing all this work, I would suggest possibly considering a catch can / elephant mod and an EGR block too (keep the anti-shudder valve incase of engine runaway).

Edited 9 October, 201114 yr by mbames

Thanks for your reply. The turbo has not seized at all but there was no oil when I disconnected the pipes. I thought that there would be some residue left in the turbo. Not familiar with the mods are they listed on here.

A catch can basically fits between the crank case breather and the cold air intake (connects back in just after the MAF). This is what introduces a small degree of oil into the air intake system. By fitting a catch can you can re-circulate the air back into the engine, but "catch" the oil. The "pikey" solution is to vent to the atmosphere, and to block off the hole in the inlet pipe after the MAF. This solution is frowned upon as you are venting oil to the road....

The warm oily air when mixed with some exhaust gasses from the EGR unit creates the horrible black "goo" which you cleaned out of your EGR/anti-shudder assembly and inlet manifold. The EGR block is essentially to block off the pipe which comes up from the turbo with a small degree of exhaust gasses in. At the same time, the vacuum control for the spring loaded plunger in the EGR assembly is also blocked off (to prevent it from opening).

I can't remember how much (if any) oil was in my turbo when I took it off....