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> Proper PCV arrangment for a 2L, A little help please
North Coast Jim
post Aug 26 2026, 08:27 AM
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Have a newly rebuilt 2L in the car with 40 IDF Weber carbs which is running fine except for a RMS dripping oil. We believe we installed it correctly and took careful steps assembling the rest of the engine/flywheel/clutch/transmission. We believe that the crankcase vent system is not working properly which is pressurizing the crankcase as RPM builds, thereby pushing oil out the RMS.

My oil fill assy has a 022115542 PCV assy in it and a solid oil fill cap. I took the valve out to see if it was working. When I blow into the bottom it is initially open. Increased pressure it closes the valve. Seems backward to me. My oil fill tower has no vent in it.

I do know that when I got this motor, 6 years ago, the PCV assy was in pieces all captured in the oil fill assy. I took it out and reassembled it thinking it was correct. Maybe not ??

I have Len Hoffman heads when he sold them direct and the vents are capped shut per his instructions.

Any help is appreciated.
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emerygt350
post Aug 27 2026, 02:05 PM
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Now I need to find one....
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JamesM
post Aug 27 2026, 02:45 PM
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QUOTE(emerygt350 @ Aug 27 2026, 12:05 PM) *

Now I need to find one....


Unless you are just looking to have every part on your car correct, if you plan on finding one for functional purposes it may not be worth the effort as like I said, the old plastic can shatter when you try to reinstall it. Also the fact at it probably already fell out isnt a good sign.

On my cars that dont have the hole welded up (because they still have a stock valve) I took a big piece of metallic tape and covered it up. I put the tape all the way across and under the gasket so it would be sandwiched in when installed for good measure. Actually did this as on one where I was able to get the plug in as well as insurance against it falling out.

I suspect you could find any appropriately sized hole plug and it could be made to work just as well, you just need to clearance one side of the plug that would overhang the edge if it were completely round.
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