Rebuild a PCV Valve

[urchin]

The PCV valve on my '66 II-A failed such that my Rover resembled a crop duster in flight. Oil filled the exhaust system so much that there was raw oil at the tailpipe.

The new PCV valve is over $150, which is awfully expensive. The car runs fine with the valve disconnected, but I have ordered the diaphragm for $13.00. How do I disassemble the unit without breaking it? Does the diaphragm simply sit in the unit? Has anyone rebuilt one before?

Thanks,

Jeff

 

[Andy Blackley]

Jeff: Isnt there a clip on the top? Just pry it off. Remove the cover and replace the diaphram.

 

[urchin]

Andy,

That's exactly what I did. When I pulled the wire clip off and popped the top, I found the existing diaphragm had become two concentric diaphragms instead of one. No wonder it pulled oil through!

The whole operation took 5 minutes and the car runs much cleaner. I still have some oil usage due to blowby on the 12-year old engine, but I can live with that for a while. So far, there's no base pressure popping through the oil fill tube or the dipstick tube.

Jeff

 

[Andy Blackley]

Great! I looked in an old (1994) RN catalog to jog my memory. That PCV is the good old Smiths "Mushroom" found on many LBCs of that era. I beleive the one used on the Series LR is the same as was used on the 65-68 MGB, and is available from Moss and others for under $30. Worth investigating.
But as you know they are pretty easy to rebuild.
Love the pics of your rig on the other thread.

 

[urchin]

Thanks, Andy. You're right on the PCV. I recognized it, too, as a mid-60's BMC/TR/BL "solution." It's right up there with the thermostatic water chokes on the Spitfires!

East Coast Rover created quite a story on their website. BTW. how do you like your Discovery Series II? I rode in one at the Maine Winter Romp, one lifted and outfitted for more challenging off road use, and I was very impressed. The utterly stock Series II that I drove a few years ago on Maine highways was extraordinary to me.

Jeff

 

[Andy Blackley]

Jeff: I like it a lot. I got a good deal when it came off lease in November, still on factory warranty. If you believe everything posted on some of the Disco boards the truck is a time bomb. BTDT, so I not too worried.
I drove a 70 Series IIA as a daily driver for 2 years, then an 83 grey market Rangie (with the LT95 4 speed) for five years. Rebuilt them both in the process. The Range Rover was a fantastic off roader.
I havent had the chance to test out my latest. But I am enjoying the heated seats and winter package here on the North Coast of Lake Erie! We've had almost 150 inches of snow accumulation this year (and it aint over).

 

[Allende]

Who has the source for the PCV valves?

 

[Andy Blackley]

See my second post above. Moss Motors has the MG equivalent, Rovers North has it for about twice the price in a LR box.
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