Quote:
Originally Posted by da judge
The reproduction cup seal is definitely not up to GM standards. The one in my Gregori booster did give away after years of use. It cracked around where it seals against the push rod. It's a part that isn't serviced at my local parts counter. I took one out of a heavily rusted spare booster my buddy had. That original 50-year-old GM seal was still soft and pliable and worked perfectly.
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What is this cup seal look like? Can you post any photos?
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