On the solenoid itself , only applies to the 69HP
2 minutes, leave the wire connected, undo the bolt, turn it over, spray and brush, bolt it back in
Every time I take a head off these 69HP engines a few days or weeks later it blocks as the gunk gets disturbed
The top Gauze is always fine, it's always the bottom quarter
Pretty easy fix but annoying, car runs but down on power and may stall at junctions
It may need cleaning a second time latter
Always been P0011 so far for me
Some of the oil galleries on the 69HP run across the top of the valve cover, if you replace the gasket, you will also need a new set of o rings, same if you change the cambelt using the proper locking tool
The 69hp needs regular oil and filter changes