1986 GMC Sierra Classic - Flatline

[Flatline454]

Originally Posted by LT7A

Could you tell me a little more about the master cylinder incident? I wasn't aware of the fitting/grinding needed for them to work together correctly. Great updates on the truck! That interior seems like it would be a really nice combination of comfortable and cleanable. How do you like the seats after using them for a while? Sure looks sharp.

I really like the seats, they are more supportive then the old bench. The old bench was almost squishy at times, this is just comfortable. It looks stiffer than it is.

With the master cylinder, they have big bore and small bore, different spider washers go into each of them. To fit the push rod between the master cylinder and hydroboost, you need to pull the spring and washer out. Leaving the push rod in you should have about 1/8" to 1/4" gap between the master cylinder and hydroboost. When I say gap, I mean between the two contact faces. If the gap is bigger, you will need to grind the push rod down, if you have no gap, you will need a new longer push rod.

In short, my rod was too long and when I really pushed on the brakes super hard, it sent **** flying. My pedal went to the floor and it got a bit sketchy real quick. haha