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Jim Grant Tech Tips Jim Grant Tech Tips
A collection of helpful articles based on reader submissions
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  Jim Grant's Tech TipsJim Grant's Tech Tips
Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by users over the course of many years.
If you have any questions, please feel free to email us.



Lincoln - Mercury
  Jim Grant's Tech Tips

'88 Ford Taurus, Brake Hose Failure

Q: Thank you for responding to my question dated 5/10/02 regarding my ‘88 Ford Taurus. I went back there and the correction on their part was "Brake Hoses". So perhaps the correct question would be "How would my brake hoses get clogged, when they did not find the problem in doing my all around brake job before?" Could that be caused by a defective Master Cylinder or not replacing the Master Cylinder when the work was all done? The reason I went back was because my car was not moving in Neutral. Not even if you pushed the car forward the car would not budge! If you would drive the car it felt as if you were pushing on the accelerator harder than usual. I really feel this Brake Hose thing was due to the Master Cylinder.

A: A brake master cylinder will not cause a brake hose to fail. Due to your vehicle’s age a brake hose problem is not a complete surprise. The inner passage of the brake hose is surprisingly small. With age the inner liner/passage of a brake hose deteriorates and swells. The condition of the brake fluid is a factor in this deterioration. Under the right condition this deterioration can cause a restriction that prevents the free movement of brake fluid. When you step on the brake pedal to stop a vehicle you produce 100’s of pounds of hydraulic pressure. This amount of pressure has little problem pushing through a restriction in the brake hose. The problem is when you let off the brake pedal. The restriction prevents the full release of the pressure that was applied to the brakes. It takes very little residual pressure at the brake caliper to cause the brakes to drag. The type of problem you had with the brake hose cannot be seen or felt when performing brake service.

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