So I have had the tank out and I’m replacing all the hoses. What is the best way round to do the main filler neck? I fitted the filler pipe to the metal neck and have now put the tank in to try and connect the filler neck to the tank. I can’t see how I’m going to do that though. Would it be better to fit the filler pipe to the tank before putting the tank in the van and then trying to do the pipe to metal filler through the paint tin lid area?
I think I understand you. I put the filler end on the metal pipe and pull through and secured to the van. The connection pipe on the tank. Lie over the hatch and go the full James Herriot on it. Do up the clamps and then get the plasters out.
Thanks, I managed to get there in the end after trying different ways. I have a 72 so no top inspection hatch.
Sorry to hijack... I have Weber 40IDFs on my 2l and I have a Weber filter on top. They have what looks like a cast aluminium 'lid' secured with butterfly nuts. I know I need to route my breather into the filter but can this be done without drilling through the filter lid on a 40IDF? The lids have fins running along the top which would make it tricky to create the seal between the inlet thread and the lid - see pic. All help appreciated Sent from my Redmi Note 7 using Tapatalk
Those are the same filters as mine and I simply drilled a tapped each one and fitted barb connection for the crankcase and fuel tank breather hoses.
Thanks @Lasty - Assuming you drilled into the flat bit in the middle to ensure the mating faces were flush?
Any seal here is irrelevant really? While the carb can freely suck past the whole thing through the filter it's NOT IMO going to suck on the crankcase. What really happens is the case breathes directly into the inside of the filter housing and the carb sucks it up with the other air that came through the filter. On a stock set up, the breather is into the inlet pipework before the filter and (again just my opinion) here it does get sucked on. So, it burns the fumes but does not contribute meaningfully to sucking them out of the case.
The stock crank case breather connection is downstream of a weighted flap in the inlet snout, the fuel tank breather connection is downstream of the filter or oil bath, so maybe a few 10's of millibars vacuum. So any oil spray keeps the original oil bath topped up, any fuel definitely gets sucked in..
Are you asking me? I drilled into the dimple above the carb throat, the thread on the barb connection is a good enough seal and the mating faces don’t need to be flush, if you do it the same way don’t fit the locking nut, or if you do make sure it can’t unscrew and fall into the carb. I used elbows similar to these: https://www.dellorto.co.uk/shop/vw-...manifolds-linkages-parts/breather-pipe-elbow/
