Moparmat2000
I'm Awesome
2 different cover seals. First one is what my truck came with. There are no moveable bladders in the seal , so as the fluid moves down in the reservoir it will create a vacuum unless its somehow vented to relieve the vacuum. The second one has moveable bladders and is for a much older truck. Probably fits the same but has bladders that can move down as the fluid moves down in the reservoir without creating a vacuum.
How would you use the upper gasket shown and not create a vacuum since its flat. I would be willing to bet without the upper gasket being vented to atmospheric with a small strategic pinhole punched in it as the factory has done, the gasket will eventually want to suck inside the master cylinder reservoir on the sides and break seal.
Gasket in pic #2 might be a better design, or not. What was GMs reasoning behind abandoning it, and going with the flat seal starting in 1988 ? Was it better? Or cheaper to produce with less manufacturing rejects and still perform the same basic function? My bet is on cheaper to produce with less manufacturing defects. Any time a manufacturer changes something like that, its usually done as a cost savings thing, since the average buyer could care less about something like that as long as it works. Now i dont intend to go to my local chevy dealer to spend $25 or more on a new gasket for my 94 to prove to you that the new one will have a hole in it from the factory as well.
How would you use the upper gasket shown and not create a vacuum since its flat. I would be willing to bet without the upper gasket being vented to atmospheric with a small strategic pinhole punched in it as the factory has done, the gasket will eventually want to suck inside the master cylinder reservoir on the sides and break seal.
Gasket in pic #2 might be a better design, or not. What was GMs reasoning behind abandoning it, and going with the flat seal starting in 1988 ? Was it better? Or cheaper to produce with less manufacturing rejects and still perform the same basic function? My bet is on cheaper to produce with less manufacturing defects. Any time a manufacturer changes something like that, its usually done as a cost savings thing, since the average buyer could care less about something like that as long as it works. Now i dont intend to go to my local chevy dealer to spend $25 or more on a new gasket for my 94 to prove to you that the new one will have a hole in it from the factory as well.
You must be registered for see images attach
You must be registered for see images attach
Last edited: