MK 3 sump spring and piston ascess

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jchill

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The MK 3 has a spring and piston that alleviates sumping
It is located behind the Rocker relief nut on timing cover

My MK 3 has been sumping and it likely the spring is fouled or worn
Is it possible to remove and clean/replace this assembly by simply removing the relief nut without having to remove the entire timing case and ignition
 
jchill said:
My MK 3 has been sumping and it likely the spring is fouled or worn
Is it possible to remove and clean/replace this assembly by simply removing the relief nut without having to remove the entire timing case and ignition
Click to expand...

No. The "non-return" plunger [41] and spring [42] are not accessible from the OPRV, as the piston [28] and spring [29] inside the OPRV are different components, so the timing cover must be removed.

http://www.nortonmotors.de/ANIL/Norton% ... 04&Part=41
 
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