Engine Mechanical

1.9td (AAZ)

CCV Mod

The AAZ has poor CCV at 50deg, upgrading to a TDI CCv setup helps.

TheSamba Reference

Clutched Alt Pulley

028903119AA

You'll need a tool/socket for this ebay search Bosch 8088 tool

1.9tdi (1z/AHU)

Headgasket

Sometimes you need to replace it with a new or unknown head.

If so this article on measuring piston protrusion

You'll need a tool/socket for this ebay search Bosch 8088 tool

1.9tdi (1z/AHU/ALH)

Everything under this category is the same/shared between the three engines such as accessory parts.

Clutched Alt Pulley

028903119AA

You'll need a tool/socket for this ebay search Bosch 8088 tool

Injector Nozzel Anatomy

Reference

The anatomy of the injector is pretty much the same between the three engines.

[https://www.myturbodiesel.com/d2/1000q/multi/nozzle-install-TDI.htm How to install replacement 1.9 TDI nozzles