Diagnosis from shop:

Bad/leaking monovalve. They recommend replacing the hose too, as it's bulging at connections due to oil exposure.

This sound correct? Does the monovalve switch on and off to seal in pressure? Also, I understand that there's a monovalve repair "kit" available that's alot cheaper than replacing the whole valve -- however, I only see the monovalve listed under fastlane for $80. Anyone have a p/n for the kit?

Thanks for any insight as always!

~Paul

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'91 300E, 208k miles