Timing belt tensioner ALH - Oil leakage

Translated on 03-07-2026, 15:19.

Hello everyone,

I bought a used, complete ALH engine, which I will be rebuilding for a Caddy 14d.
Unfortunately, I'm finding several inconsistencies with the engine - at a price of 200€, one shouldn't be surprised. I hope that at least the lever mechanism is in good condition.

The screws on the intake manifold were loose, and so was the hose on the intake side of the turbo. This has caused the back of the engine to become heavily oiled.

Today, I disassembled the engine further, and there was also oil everywhere under the timing belt cover. On the entire surface.

Do you have any idea where it's coming from? Since it's all the way up and quite evenly distributed, I don't think it's the crankshaft seal. What do you think?

I don't work on TDI engines every day, but on an ALH engine that I had a few years ago, everything was completely dry during the 180,000 km timing belt replacement.

If this question is too simple for the forum, here is another one:
Which WASTEGATE charger would you recommend for a 1.9 TDI for a boost pressure of 1.5-1.7 bar up to approximately 4,200 rpm?

Thank you and best regards.
Bernd

04-11-2017, 23:15 Subject: Timing belt tensioner ALH - Oil leakage

[Translating...]

Nockenwellensimmerring und Kurbelwellensimmerring. Wo solls sonst her kommen..... mach halt neu und gut ist. Ist ja pipi einfach bei ausgebautem Motor

Last edited on 05-11-2017, 9:38, edited 1 time in total.

[Translating...]

Hi

Quote:

Welchen WASTEGATE Lader würdet ihr am 1,9 TDI für einen Ladedruck von 1,5-1,7 Bar bis min ca. 4.200 u/min empfehlen?

absoluter oder relativer Ladedruck?
Absolut: Den Turbolader vom AGR Motor.
Relativ: Keine Ahnung, da würde ich niemals einen Wastegate-Lader verbauen, da der sehr gross dimensioniert sein müsste und dann viel zu spät anspricht, ausserdem der restliche Motor eine schlechte Basis für einen solchen Ladedruck ist.

Viele Grüsse, Rainer