Got a brake problem
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Got a brake problem
I keep blowing the seals on my right rear caliper. I get a new one and it leaks. I thought it was parts related but I have changed it out 5 times now and I am at a loss. I was wondering if anyone knows if the brake control module on a 2004 f-350 superduty could cause too much pressure to go to just one caliper? And if not what could?
Lead Driver
Joined: May 2003
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From: Lyndonville, Vermont
If the rotor is good and the pads are good its the caliper..If the rotor and pads are worn too much maybe I could see a problem but not really..If you had too much pressure the tire would lock easily.. Get a different brand caliper like wagner...Actually never heard of such a thing. Been wrenching before disc brakes were....
Dick
Dick
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If the rotor is good and the pads are good its the caliper..If the rotor and pads are worn too much maybe I could see a problem but not really..If you had too much pressure the tire would lock easily.. Get a different brand caliper like wagner...Actually never heard of such a thing. Been wrenching before disc brakes were....
Dick
Dick
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Joined: Apr 2012
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From: North Georgia
maybe a warped rotor causing extra stress on the seal? wheel bearing? if you grab your wheel can you wiggle it on the bearing and feel ANY play?
is there such a thing as bad fluid? or the wrong type? something eating the seals maybe?
hope you get it figured out... and let us know eh?
xtof
is there such a thing as bad fluid? or the wrong type? something eating the seals maybe?
hope you get it figured out... and let us know eh?
xtof
Elder User
Joined: Oct 2001
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From: Jersey Shore Not Seaside!
Since both rear calipers are fed from the same union connected to the single drop line frame to axle, there is nothing from the application system that is over pressurizing one wheel end.
Five calipers that have leaked? Where are you getting these calipers from? And what do you consider a leak? Is it possible that your supplier is using excessive assembly lube which has bled out from the dust boot rather then brake fluid loss?
Five calipers that have leaked? Where are you getting these calipers from? And what do you consider a leak? Is it possible that your supplier is using excessive assembly lube which has bled out from the dust boot rather then brake fluid loss?
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Since both rear calipers are fed from the same union connected to the single drop line frame to axle, there is nothing from the application system that is over pressurizing one wheel end.
Five calipers that have leaked? Where are you getting these calipers from? And what do you consider a leak? Is it possible that your supplier is using excessive assembly lube which has bled out from the dust boot rather then brake fluid loss?
Five calipers that have leaked? Where are you getting these calipers from? And what do you consider a leak? Is it possible that your supplier is using excessive assembly lube which has bled out from the dust boot rather then brake fluid loss?
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Lead Driver
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Postmaster
Joined: Apr 2012
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From: North Georgia
yeah i would tend to agree that puddles of fluid on the ground constitute a legitimate leak.
i cant believe that a part that passes all its inspections at the manufacturer, and that many of them fail consecutively. cant speak for orieleys because i dont get my parts there... i like napa... they havent let me down yet.
is it a possibility that maybe the parts were not direct replacements for your truck? like a system glitch ir an input error that put them in the wrong place in the system... otherwise there is a serious manufacturing issue going on. would be interested to know if anything comes of this... what is the orieley part number for what they sold you?
i cant believe that a part that passes all its inspections at the manufacturer, and that many of them fail consecutively. cant speak for orieleys because i dont get my parts there... i like napa... they havent let me down yet.
is it a possibility that maybe the parts were not direct replacements for your truck? like a system glitch ir an input error that put them in the wrong place in the system... otherwise there is a serious manufacturing issue going on. would be interested to know if anything comes of this... what is the orieley part number for what they sold you?
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Joined: Jan 2004
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Are you sure the leak is coming from the caliper piston seal and not the crush washers on the banjo bolts? These should be replaced when replacing calipers but it's sometimes overlooked and they are reused.
If it is the caliper piston seal as said before the pressure would be balanced between the two sides as they are fed from the one line. The only other thing I could think of is a possible stuck caliper or line obstruction on the left side which would cause the right caliper to get slightly more pressure but you would feel the truck pull right when braking and even still it shouldn't be blowing seals.
If it is the caliper piston seal as said before the pressure would be balanced between the two sides as they are fed from the one line. The only other thing I could think of is a possible stuck caliper or line obstruction on the left side which would cause the right caliper to get slightly more pressure but you would feel the truck pull right when braking and even still it shouldn't be blowing seals.
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Joined: Oct 2001
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From: Jersey Shore Not Seaside!
>>>> What I consider a leak is brake fluid running down the inside of my tire and leaving puddles on the ground.
Yeah that’s a pretty good leak.
>>>> I cant believe that a part that passes all its inspections at the manufacture ….
You have an optimistic view of what happens in the aftermarket.
>>>> Is it a possibility that maybe the parts were not direct replacements for your truck?
Nothing else bolts up.
>>>> Are you sure the leak is coming from the caliper piston seal and not the crush washers on the banjo bolts?
That is an excellent point. If you used an aftermarket copper washer often they are thin and don’t have the same crush. If you reused the original washers, they become work hardened during the initial use and will not seal correctly. If the copper washers have to be reused then they need to be heated cherry red and allowed to slowly air cool to soften them for reuse.
The best way to check if the leak is coming from the banjo connection is spray the area with alcohol to wash off the glycol and dry quickly. With the engine running, have someone press the brake hard while you watch for fluid escape.
Yeah that’s a pretty good leak.
>>>> I cant believe that a part that passes all its inspections at the manufacture ….
You have an optimistic view of what happens in the aftermarket.
>>>> Is it a possibility that maybe the parts were not direct replacements for your truck?
Nothing else bolts up.
>>>> Are you sure the leak is coming from the caliper piston seal and not the crush washers on the banjo bolts?
That is an excellent point. If you used an aftermarket copper washer often they are thin and don’t have the same crush. If you reused the original washers, they become work hardened during the initial use and will not seal correctly. If the copper washers have to be reused then they need to be heated cherry red and allowed to slowly air cool to soften them for reuse.
The best way to check if the leak is coming from the banjo connection is spray the area with alcohol to wash off the glycol and dry quickly. With the engine running, have someone press the brake hard while you watch for fluid escape.
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Are you sure the leak is coming from the caliper piston seal and not the crush washers on the banjo bolts? These should be replaced when replacing calipers but it's sometimes overlooked and they are reused.
If it is the caliper piston seal as said before the pressure would be balanced between the two sides as they are fed from the one line. The only other thing I could think of is a possible stuck caliper or line obstruction on the left side which would cause the right caliper to get slightly more pressure but you would feel the truck pull right when braking and even still it shouldn't be blowing seals.
If it is the caliper piston seal as said before the pressure would be balanced between the two sides as they are fed from the one line. The only other thing I could think of is a possible stuck caliper or line obstruction on the left side which would cause the right caliper to get slightly more pressure but you would feel the truck pull right when braking and even still it shouldn't be blowing seals.
Freshman User
Joined: Nov 2011
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I'm just spit balling here but could it be the wheel seal leaking ? Have you seen it coming from the caliper dierectly? A wheel seal will sling oil everywhere. Try pulling the caliper off with the line still hooked up and with someone to help you. put a small piece of wood in the caliper so the pistons won't fly out clean it up real well and have them push on the pedal while watching the caliper. Just an idea. 
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