So I'm building a mtdi over the course of the next year or so as a project. I picked up a 1Z pretty cheap along with an ALH 10mm IP and an AAZ IP. Those two pumps are both cores and will need work to get where I want them, but hey, it's a project for fun. Libby has given me a few pointers along with a few other websites. the AAZ pump isn't super optimal in stock form for an mTDI. however I'm pretty good at fabrication and I think I can get most of it's flaws worked out.
From the start I'm adding a timing advance spacer to get more advance at high RPMs, an aftermarket boost pin, rebuilt injectors set to higher pressure, and I plan on a lift pump when installed in a vehicle.
Libby pointed out these issues: "the boost enrichment is terrible
(improved with boost pin), the timing advance curve is wrong, the control collar lever assembly is bad and the accelerator lever assembly is bad.
I plan on doing a variation of "HEY"'s lever modification IMO not a pump worth starting with. "
A member on the Samba called "?Waldo?", seems to post very similar to libby actually pointed out a few more things. smaller plunger, bad cam plate for a tdi. I am borrowing both of these from the ALH donor. the timing advance is incorrect for a TDI. This I would argue. A softer spring and faster advance is sought after for performance mTDI pumps. the AAZ has a much softer spring, but it does has less travel, hence the spacer.
So it seems there is a bit of work if you want this pump to perform. I'm going to give it a shot since I got it quite cheap. If anyone has any constructive criticism or know more flaws to work on I'm open to hearing them. Without further ado, here we go.
![](https://i.ibb.co/X3wNtHw/ALH-camplate-and-rollers.jpg)
Here is the TDI camplate and rollers, I didn't document much of the ALH teardown, it is very simple.
![](https://i.ibb.co/h1SF2CZ/ALH-10mm-head.jpg)
10mm head, I will clean this up more later. I have already soda blasted this. I may tear it apart and remove the rust from this. Evaporust would be my weapon of choice for a delicate part like this.
![](https://i.ibb.co/yP6QTbR/ALH-pump-guts.jpg)
All ALH parts, I'm keeping these for spares, etc. Or if anyone needs the parts. IDK.