Quote:
Originally Posted by bsn
The silicone grease on a new unit is only to protect the seal from dry operations, once its filled with brake fluid the brake fluid is the lubricant and the only lubricant needed.
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That's what I was thinking as well. I mean, the way the lubricant made it's way into the CMC, isn't that normal? It also seemed like that was the only other thing that could've made the seals inside fail as well, so I'm not even sure anymore.
The main plunger shaft that was also lubricated with the same silicone stuff, seemed to move like crap once I had it on the car long enough, for it to dry out. The hydraulic pressure was enough to push it back to return, as well as me pushing on the pedal to move the plunger shaft; it just simply felt like crap when taken off of the car.
This is why I was concerned with adding extra silicone lubricant on my most recent CMC that I installed. As for all of the other previous failed ones, I never touched them and they still failed, so I was thinking it was related to maybe a particular part number that was defective. I updated my Amazon reviews, but am not sure if the AC Delco CMC that I had issues with (with the opaque colored plunger attachment), posted it on their listing yet.