- Location
- MilkyWay Galaxy
OK, tired of this 3 year battle with my 87 Jeep brakes
Tried three AZ (auto zone) new durajunk MCs, Master cylinders, new Vac booster, all new brake parts except the Combo valve, and I mean all new!!! No air in the system
With all three MCs, the brake peddle was rock hard with the engine off after 3 pumps of the peddle (first 2 had Vac still in the new booster).
And I mean rock hard!!
But turn the engine on (vac on) and the peddle feels like mush to the floor (one inch from the floor) in park, but drive it and the brakes work, I can slam on the peddle and toss someone into the dash at first, but they fad easy in a 4+ second freeway panic stop and press the peddle to the floor and the car coasts before stopping.
I now suspect a 3 year running batch of bad AZ MCs, tried 3, that are out of OEM spec on the piston cups and or cylinder wall diameter on these new MCs, and thus can not holder pressures when the new vac booster is on?
Any counter ideas or does everyone agree I need a new source for Renix era MCs?
Any suggested new source or brand? I want cast iron, had too many 1 year old failures with corroded (not properly anodized) aluminum ones in the prior 6-8 years from AZ.
Thinking Rock auto, but what brand? Any heavy duty aftermarket ones???
Tried three AZ (auto zone) new durajunk MCs, Master cylinders, new Vac booster, all new brake parts except the Combo valve, and I mean all new!!! No air in the system
With all three MCs, the brake peddle was rock hard with the engine off after 3 pumps of the peddle (first 2 had Vac still in the new booster).
And I mean rock hard!!
But turn the engine on (vac on) and the peddle feels like mush to the floor (one inch from the floor) in park, but drive it and the brakes work, I can slam on the peddle and toss someone into the dash at first, but they fad easy in a 4+ second freeway panic stop and press the peddle to the floor and the car coasts before stopping.
I now suspect a 3 year running batch of bad AZ MCs, tried 3, that are out of OEM spec on the piston cups and or cylinder wall diameter on these new MCs, and thus can not holder pressures when the new vac booster is on?
Any counter ideas or does everyone agree I need a new source for Renix era MCs?
Any suggested new source or brand? I want cast iron, had too many 1 year old failures with corroded (not properly anodized) aluminum ones in the prior 6-8 years from AZ.
Thinking Rock auto, but what brand? Any heavy duty aftermarket ones???
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