Positive Crankcase Ventilation (PCV) valves

[Owen Evans]

Originally Posted by Jordan Baker

Grant.

Just wondering if you had any luck with regards to these PCV valves? I’m missing one for my engine

Jordan,

The attached shows the Chevrolet setup. This valve also has no spring inside it, but is helpfully marked with an arrow next to the word 'UP'. It is a sealed unit, but I believe there is a later type that screws together. I could find no part number on my valve, but it is marked with 'Donaldson Co. Inc., St Paul, USA', if that helps.

Check out sections K4 and K5 of the MB-C1 maintenance manual for some more info, including a schematic of the valve.

Owen.