Brake Line Location vs Exhaust

[Way2Fast]

Did anyone happen to notice how close the brake lines run to the exhaust pipe? This was brought to my attention by a post on the other forum. When looking under the Spyder from the right side, just left of the riders foot peg, you will see that the exhaust pipe is very close to the steel vehicle frame where the hydraulic brake lines are located. Given the high temperatures of the exhaust pipe, it seems possible that the frame and brake lines might also be heated up. If the brake fluid expands due to the high temperature would it not be possible for the heated fluid to apply pressure on the calipers which in turn would cause the brake pads to drag on the rotors? This constant dragging might evidentually glaze the pads causing them to squeal....one of the brake problems reported so often by owners. The brakes on my Spyder operate fairly quiet, but I intend to purchase some exhaust pipe insulation and isolate the hydraulic brake lines from the exhaust. Perhaps BRP overlooked this scenario when trying to solve the brake noise issue. (??) :dontknow:

Richard

 

[captainryder]

Very Interesting !

Let us know how, and what you did. I think this really could be a source of the problem. Especially, since some people say that the squeals come not early but later in break-in on the roadster.

 

[spyryder]

There's no pressure in the system when the brakes are released. That's why the reservoir caps are vented.....so that pressure(and vacuum) can't build up.

 

[Lamonster]

There's no pressure in the system when the brakes are released. That's why the reservoir caps are vented.....so that pressure(and vacuum) can't build up.

:agree: The fliud will take the least path of resistance.

 

[Way2Fast]

There's no pressure in the system when the brakes are released. That's why the reservoir caps are vented.....so that pressure(and vacuum) can't build up.

Makes sense, unless some sort of one way valve is used that prevents fluid under pressure from following the path of least resistance and returning to the master cylinder reservoir :dontknow:. When the brakes are applied why does the fluid under pressure expand the caliper pistons and not flow back into the reservoir ??

 

[Lamonster]

Makes sense, unless some sort of one way valve is used that prevents fluid under pressure from following the path of least resistance and returning to the master cylinder reservoir :dontknow:. When the brakes are applied why does the fluid under pressure expand the caliper pistons and not flow back into the reservoir ??

It flows back when you take your foot off the brake.

 

[spyryder]

Makes sense, unless some sort of one way valve is used that prevents fluid under pressure from following the path of least resistance and returning to the master cylinder reservoir :dontknow:. When the brakes are applied why does the fluid under pressure expand the caliper pistons and not flow back into the reservoir ??

There's a return port in the master cylinder which is open to the reservoir when the brakes are in the released position. This port is just in front of the master cylinder piston. When the brakes are applied the piston moves forward, covering the return port and isolating the reservoir. Note: this is a typical master cylinder.

 

[Way2Fast]

Thanks !