Check the dipstick boot on the bottom of the oil filler tube... If it has had a new one fitted recently, then the petrol would've accelerated the rate at which it fails...
If it is that, I have some viton ones which are oil stable, unlike the rest that are available in the EU/UK
What're your plans on stopping the fan sucking in hot air off the exhaust?
Normally with a type 4 in an EB I would recommend going with type 1 or Porsche cooling. That way you don't need to hack the engine bay about!! 8)
I make the over flywheel (front) tin in GRP...
I don't make a massive amount of them as they're a pain in the hoop to trim once you pull it from the mould...
Make sure it's not actually the thrust bearing moving in the case...you'll need the flywheel off to see...
Push the pulley towards the flywheel end, then watching the bearing, pull it back... If the bearing doesn't move then try pushing it back into the case
No movement = win
Bearing moving =...
1800... Could well be cracked heads as well!!
Biggest valve heads that vw did apart from the Porsche 2l out of the 914...
Of all the heads I've looked at, 1800 ones seem to be the worst for cracking through the exhaust port into the head!!
Good luck with it :smile: