the 1Z and AHU tdi engines will bolt up just fine at 50 %  using diesel
vanagon engine mounting parts.
the next tdi engine , the ALH, which stats in 99, will not.
they used the same inline four basic engine block, gas and diesel, from
about 1975 to 1998.
With the start of the New Beetle in 99 they finally went to a really
different engine block.

so 'up to a 98 AHU" is the short answer.'
Scott
www.turbovans.com
----- Original Message -----
From: "Gilles Turmel" <gilles.turmel@SYMPATICO.CA>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, August 28, 2008 2:08 PM
Subject: From 2.0L ABA to TDI

> Hi,
> I'm in the process of installing a 97 ABA engine in an 91 2WD Westy.
> I'm going the 50 degrees way.  The project is not completed and I'm
> wondering if I could swap the gas engine for a TDI and still keep the 50
> degrees approach.  If yes, what engine should I start looking for?  Any
> info on the TDI installation would be welcome.
> Best regards.
> Gilles Turmel