Brake caliper piston lube
Posted: Sat Jan 09, 2021 12:24 pm
So when I took apart my Cadillac Seville caliper, I found a bunch of rusty sludge in it.
Bore: cast iron
Piston: chrome-plated steel
Brake fluid: DOT 3
Back in the day, I had assembled this with brake fluid as lube to help insert the piston. So after just a few years (less than 10), this happened.
Apparently, for a long-lasting caliper, one is supposed to lubricate the bore with some sort of silicone grease... this is supposed to help keep the corrosion at bay.
What is the correct product to use in a caliper piston bore?
I have some Eze Slide on the shelf, which is a silicone grease, meant for caliper sliding pins. Don't know if it can be used in a piston bore.
I am wary of using silicone grease, because of the warnings of mixing silicone DOT 5 brake fluid and regular DOT 3... I don't know if this matters or not.
Caliper materials (not sure about the relevancy, but here it is):Bore: cast iron
Piston: chrome-plated steel
Brake fluid: DOT 3
Back in the day, I had assembled this with brake fluid as lube to help insert the piston. So after just a few years (less than 10), this happened.
Apparently, for a long-lasting caliper, one is supposed to lubricate the bore with some sort of silicone grease... this is supposed to help keep the corrosion at bay.
What is the correct product to use in a caliper piston bore?
I have some Eze Slide on the shelf, which is a silicone grease, meant for caliper sliding pins. Don't know if it can be used in a piston bore.
I am wary of using silicone grease, because of the warnings of mixing silicone DOT 5 brake fluid and regular DOT 3... I don't know if this matters or not.