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Hello,
There is no spring loaded mechanical PCV valve.
When Volvo went to the B20, they started using a ported PCV fitting on the intake manifold to replace the PCV valve.
All that is necessary for serving the fitting/valve is to clean it with a piece of wire to make sure it can provide vacuum.
The breather box on the side of the block is retained by a 1/4" bolt if you want to clean it.
But removal in normally only done to replace the oring.
The breather box should have a flame trap mounted inside the nipple for the PCV hose and these do become plugged over time.
I keep new ones in stock.
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Eric Hi Performance Automotive Service (formerly OVO or Old Volvos Only) Torrance, CA 90502
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