Ultimate-Engineering

Ultimate-Engineering Specialising in TDI engine conversions & fitting parts for the VW T3/T25

All inquiries please visit: http://www.ultimate-engineering.co.uk/contact.php

So you need to fit the Blue oil pressure switch to your PD engine, but don’t know where it goes. Remove this small b**g ...
16/04/2026

So you need to fit the Blue oil pressure switch to your PD engine, but don’t know where it goes.
Remove this small b**g with a hexagonal key and replace with the factory Blue oil pressure switch that fits the cylinder head of the original JX 1.6TD engine.

As we move away from the VNT15 of the older VE pump engines such as AFN and move to the VNT 17 used on the newer bigger ...
16/04/2026

As we move away from the VNT15 of the older VE pump engines such as AFN and move to the VNT 17 used on the newer bigger horse power PD engines it has been necessary to create a solution to using these turbos clocked for the 50o engine angle.
Attached are some images on how I do this.
I can now offer the drilling jig to get the dowel pin location spot on so you can reindex the oil inlet and outlet to be as vertical as possible.
Also the actuator mounting bracket needs to be re drilled as per the VNT15 and the shorter VW push rod needs to be used to give the best clearance from the engine block. (Thanks go to Rocco for sharing this useful pushrod upgrade)

A somewhat late entry on the work with the Porsche tiptronic gearbox conversion.I offered the TDI engine and gearbox up ...
16/04/2026

A somewhat late entry on the work with the Porsche tiptronic gearbox conversion.
I offered the TDI engine and gearbox up to a T3 syncro to see if any additional work was required to get it to fit.
It’s a big gearbox and even in a syncro with its lower engine and gearbox it will still require bodywork modifications to get it in place.
I don’t want to cut into this syncro, so I’m going to fit the package into a 2wd van I have which has already been modified to take the longer Renault UN1 gearbox.

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