...here's a couple of tools that can be very easily made for common vw tasks. apols if this is old hat to some of you.
First is this one for stubborn gudgeon pin removal. I've had ones before that wouldn't respond to heating piston around the pin.
You'll need 3 13mm nuts, 15cms or so of threaded rod to suit, two large washers and a bit of a bike seat post same length as a gudgeon pin.
Sandwich one of the large washers on the rod tight between two of the 13mm nuts. Now grind or file that nut down so its slightly less diameter than a stock gudgeon pin.
To use, simply place rod thru g.pin (circlips removed) with sandwiched washer up against g. pin. Place seatpost piece over rod on other side of piston, then put a large washer on next and then another nut. As you tighten single nut, pin is pulled into seat post piece.
Ignore other tools in second pic - just there for mock-up purposes.
Next up a tool for installing flywheel oil seals. I know there is a proper tool for this but it ain't cheap and I'm sure I'm not alone in having only so much money to spend on tools.
All it is is an old 85.5mm (1600) piston with the 'tabs' taken off.
You'll find its an exact fit for tapping in the seal with a soft faced mallet. Go gently here, you don't want to pinch the seal. I've done a fair few this way now and never had a leaker. When I get round to it I'll fit a pin dead centre of piston face so pressure will be even all around seal.
This pic shows how good a fit it is:
Next up tool for oil relief valve removal:
I had a relief valve that refused to come out. Hermitage tool is £20, and my magnet on stick wouldn't get it so...
Slide rawlplug into valve, turn in screw and look what happens:
Pull on screw head and out she comes.
Total cost: 12p