I have a clyde berg pcv breather box that allows crank case to exhaust through small foam filtered vent. The DMV referee said I have to have a closed sytem. Can I close the vent off in order to appease the DMV or? A friend told me this could cause seals to blow. I considered doing a temp fix just to get past the issue.
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What year is car registered as? I've had '57-72 VWs and they all vent to the atmosphere as OEM. This would be from the oil filler cap/generator stand thru the tube that exits below the upper cooling tin. Run your vents into air cleaners for inspection - that would be a closed system - fumes would burn off with gas/air intake mixture.
Option two is to remove the breather box and do a temp hose routing to the air cleaner thus a "reburn."
John:
If you simply close off the vent, then crankcase pressure will build up and push oil out behind the fan pulley on the crankshaft - there is no seal there and slightly more than "normal" crankcase pressure will force oil out there.
Both Wolfgang and Alan recommend the same thing, and so do I: Remove the small foam filter from the box and run that hose to one of your air cleaners. The oil is vaporized by the time it gets that far so there's nothing to worry about. You might as well leave it connected that way, permanently, so dress the hose off and make it neat. Most of us have been running something similar to that for years with no issues. I have two hoses running from my CB breather box - one to each air cleaner - and it works just fine.
Thank you guys so much! I will run to both air cleaners and close off the foam vent.
Thats funny because based on pics off the internet I was considering this. The oil filler has a removable allen head screw. Is there a part that threads into the filler, where I can run a hose.
I think the problem is that the breather box is "open" (there's a gap around the lid)-- so running a drain back to the filler neck isn't going to do anything to seal it up. If he eliminated the breather box altogether (or sealed it up) and ran a line back to the filler neck, he'd be venting his crankcase back into the crankcase. This wouldn't really do anything at all... but it might keep the referee happy.
I'm not wild about the air-cleaner method either, but it's a common practice. I did it for a few years (I even fabbed a Bernoulli tube to stick in the center of the back velocity stacks to draw harder).
If it were me, I'd just take it off for the inspection, and put it back on once I got the sticker.
That's what I would do too.
