No brakes on cold mornings

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West Slope Rover

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A guy I know has a 2006 HSE Sport and we were talking Rangies. He has money and takes his to the local Land Rover dealership to have things fixed. I don't have money and keep mine going myself (with the invaluable help of this forum) so he quizzed me on this thinking I was a mechanic.:eek: He asked what would cause him to have no brakes on cold mornings. The pedal is rock stiff when he tries to hit the brakes. Pedal barely moves, so no stoppy.

Land Rover says they've never heard of such a problem, so he's asked the techs to come to his place in the morning to test it because by the time he's driven to the dealership, the brakes are fine. They won't do it.

Now, I'm a knuckle head, not a Land Rover tech, but I'm thinking sticky pots due to metal contraction and binding. Friction of calipers on disc heat things up enough to work again. But that would be something a Landie tech would know, right? Or am I too simplistic in my theory?

Any ideas wise ones?
 
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Can't remember what car it was but many (20+) years ago remember diagnosing a similar problem, somehow the brake servo pipe had loads of water in it, and then froze stopping the servo working in the cold. the car would be fine after a couple of hours use (engine bay heat would defrost the pipe) and then the problem would reappear the next morning - obviously we are talking -0 temps here.
 
Can't remember what car it was but many (20+) years ago remember diagnosing a similar problem, somehow the brake servo pipe had loads of water in it, and then froze stopping the servo working in the cold. the car would be fine after a couple of hours use (engine bay heat would defrost the pipe) and then the problem would reappear the next morning - obviously we are talking -0 temps here.
Yeah, temps in the range of 0 to -10.
What was the remedy?
 
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Yeah, temps in the range of 0 to -10.
What was the remedy?


Well my way of thinking is that a nite as temp goes down there is a little condensation and the steel freezes the pads in place on the sliders. Know take the pads off clean and but anti seize( the brit call it copper grease) on the slides, put back together should be ok.

When he drives to the dealer the friction causes heat and that warms up the pads which release them selves. Then he has good brake peddle. Do the repair as discribed and make a 100$ on it and tell him if it dosen't work then no pay:D:D:D
 
Well my way of thinking is that a nite as temp goes down there is a little condensation and the steel freezes the pads in place on the sliders. Know take the pads off clean and but anti seize( the brit call it copper grease) on the slides, put back together should be ok.

When he drives to the dealer the friction causes heat and that warms up the pads which release them selves. Then he has good brake peddle. Do the repair as discribed and make a 100$ on it and tell him if it dosen't work then no pay:D:D:D
That's very plausible, Mr. Capitalist.
 
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If the brakes work the same as the P38, it could also be the pump motor, but I would go for water in the brake fluid freezing,especially if it hasn't been changed recently. Brake fluid is hygroscopic, it absorbs water, which is why it should be changed regularly.
 
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Plausable reason Keith. All fluids will thicken up in extreme cold, but that is far more serious than the fluid just being less viscous. Think i would be changing the fluid PDQ.
 
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