Originally Posted by
tziger
Hi Robert,
I know that the existence of the hole is to avoid a hydraulic lock in case the small cylinder becomes completely filled with grease. I would not block the hole. There is an explanation earlier in the thread from Stuart Mckay.
In case of an hydraulic lock there will be a carnage in the cam area.
BR,
Lawrence
Ok, actually once I saw a small pile of grease in the area where the hole are, but at that time I really newer understood where it came from, I'll search for Stuarts thread.
Still, this hole to me appears like a quick dirty fix, instead of designing a proper piston and sealing, that don't leak anything from below and if there are a overpressure in the came area vent it out elsewhere.