Blown Wheel Cylinders

[drtkwsk13]

Well guys I gotta a another question. I recently just completed my rear brakes (pads, springs, clips cylinders etc...). After completing them I was bleeding them with a buddy when my pedal went to the floor. Turns out the rear left must have blown a seal because the brake fluid was coming from the wheel cylinder. I chalked it up to a cheap cylinder (centric $6.80). Installed another one last night, bled the brakes again and went for a ride. Everything was great, after the truck sitting outside I went to pull it in. The pedal went to the floor again!!! This time the rear right cylinder (also a centric one) had blown a seal! Any ideas why this is happening? 1968 D200.

[Kaegi]

answer is "Made in China" maybe full of rocks right out of the box? I have heard of that lol

[dynamutt]

hmm. Id disassemble it and examine the rubber cup and the finish on the bore..... made in China? might well be the rubber used for the cup isnt compatable w/ brake fluid.... or is just not up to spec.

[cudaboy]

Is Centric a brand name ? Where did you buy them, so that I can avoid the same issue ?

[Wildergarten]

Is Centric a brand name ? Where did you buy them, so that I can avoid the same issue ?

Yes. They suck.

[drtkwsk13]

Is Centric a brand name ? Where did you buy them, so that I can avoid the same issue ?

I found them on rock auto, ended up buying Raybestos ones. Will be bleeding them and testing them this week. Would think I shouldn’t have problems. On a side note, my master cylinder has 2 reservoirs I would assume front and back? When my cylinder blew should I still have breaks up front? Thanks

[PwrWgnDrvr]

Yes, the dual m/c is so u have brakes when one side fails. Front reservoir on the master is for the rear brakes.

[drtkwsk13]

Yes, the dual m/c is so u have brakes when one side fails. Front reservoir on the master is for the rear brakes.

That’s what I thought, however I did not... how could I check why I loose all my brakes if I have a leak?