Vehicle Specs
VW T4 1998
2.5Lt Manual
Petrol Van
RH Driver

Hi, a few months ago my van stalled at low speed.
It would not start again until approximately 30 min rest.
The starter turned the engine over strongly - just no fire.
All power was available for all accessories.

After 30min rest - it would start like nothing was wrong, until 30 min later. BOOM no engine.
This has not changed despite the following:
A Mechanic was engaged for diagnosis. A thorough wire inspection was conducted.

1. MAF replaced
2. Codes checked - non of any significance.
3. Distributor Replaced (complete unit with hall sensor)
4. Coil and leads replaced = Strong sparks at plug end.
5. Fuel delivery checked while disabled - plenty of squirt.
6. Relays - relays removed and replaced.
7. The alternator pumps out 14.0v at start-up.

With the components above replaced it starts very well first turn and purrs like a kitten until it gets up to temp and running at idle for 30min it cuts out.
Something in the system is getting hot and failing

Any clues?

Please supply inks to info/parts/location images etc if possible in the replies.

Thanks in advance

Jon.