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Metric bolts are supposed to show the grade above M5. When there is no marking I would not trust them and always have a bad feeling when driving around. Instead, I would get them from the dealership. The certainity to have good material would offset the higher price (At least for me). Edit: It appears that the bolts are galvanic coated. Galvanic coating and ...


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Those are some badly rusted brackets... I would not use heat to loose the bolts, as that will seriously weaken the bracket. Those means are for parts that will be discarded anyway. To remodel them you need to drill out the stubs, as I see no chance to remove them by other means. The "blockade" is strong enough to shear off a 10mm shaft, so vice ...


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Pascal's law says that the hydraulic pressure must everywhere be equal. Pressure is defined as a force devided by an area. P = F/a. Thus the force F is equal to the pressure P times the surface area A. F = P . A Consider a simple brake setup with 1 master cylinder and 1 caliper (with 1 pistion). The pressure at the master cylinder must equal the pressure at ...


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You didn't mention the car make and model, but I'm assuming your car uses a vacuum powered brake booster. (See below image) It uses vacuum power from the engine to multiply the force applied to the brake pedal. If the brake booster fails or if there is a vacuum leak, it will not work properly, resulting in a hard brake pedal. The brake booster (black), the ...


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