What are you guys using for brake fluid ? Ive got a full container of silicone DOT 5 fluid out on my shelf. Is it compatible with the systems in G bodies ? Or should I use something else ?
I actually use silicone brake fluid in my Porsche, simply for the reasons stated....it doesn't absorb moisture...it won't eat into your paint...and it has a higher boiling point. ...and the fact that the car is rarely driven, it won't degrade like the conventional hygroscopic stuff.
Mich, I would go with the conventional Dot 4.
I also think you can't just flush out either/ or and switch over. I think it would have to be a freshly gone over brake system.
I used it in my old Porsche 914 and was disappointed that I couldn't get a firm pedal. I rebuilt all four calipers, new 911master cylinder, etc. As much as I bled the system over and over, I just couldn't get a firm pedal.
Silicone fluid is not recommended for race cars or any track use, and can't be mixed with conventional brake fluid.
I wasn't aware that you couldn't mix synthetic brake fluid with non-synthetic.
Mich,I think this is going to cost me some time and a decent amount of money. I dont even remember why my friend talked me into using the DOT 5. Now Im assuming I'll have to replace the master, calipers, wheel cylinders, and the proportioning valve on the 81.
Any ideas of what I can use on the SS lines ? What about the rubber lines ? Replace them too ?
THIS is exactly why Ive grown tired of working on this crap. Time and money and me crawling around under the car AGAIN ! This sh*t will never get finished.
Mich,
I wouldn't replace any of the lines or hoses, only if they really needed to be replaced. I think it's mostly the hydraulics would need to be rejuvenated. I would just flush out all the lines and probably even the combination valve.
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