Front caliper brake line crush washer
03-05-2021, 08:31 PM
#16
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"One each side mate, and remember they can be re annealed by heating till they are orange and quenching in water, this makes them soft again so they seal better without reefing on the bolt to hard."
OK, this made me curious, because I had always heated til red, then let air cool. A little digging produced this:
"In the cases of copper, steel, silver, and brass, this process is performed by substantially heating the material (generally until glowing) for a while and allowing it to cool. Unlike ferrous metals—which must be cooled slowly to anneal—copper, silver and brass can be cooled slowly in air or quickly by quenching in water. "
So, the old method still works and is a lttle easier. Hang the clean washers on a steel rod, heat with a gas flame till red-hot, allow to cool.
OK, this made me curious, because I had always heated til red, then let air cool. A little digging produced this:
"In the cases of copper, steel, silver, and brass, this process is performed by substantially heating the material (generally until glowing) for a while and allowing it to cool. Unlike ferrous metals—which must be cooled slowly to anneal—copper, silver and brass can be cooled slowly in air or quickly by quenching in water. "
So, the old method still works and is a lttle easier. Hang the clean washers on a steel rod, heat with a gas flame till red-hot, allow to cool.
oh...and a tip....
dont let the washer get too close to the hot part of the flame on your torch. It happens very quickly.
...
.
03-06-2021, 09:56 AM
#17
Team Owner
note when heating these sealing washers,
lay them flat on a thicker piece of steel ,
then heat them,
otherwise they can melt and turn into an oval if you hang the part .
lay them flat on a thicker piece of steel ,
then heat them,
otherwise they can melt and turn into an oval if you hang the part .
08-08-2021, 11:51 AM
#18
Rennlist Member
Hi All,
Old thread but this was the only one I could find in a search.
Just replaced my front brake hose and its dripping at the caliper end without even applying the brakes.
In this chat everyone says to put a crush washer either side of the hose, but PET only shows one on the bolt side?
I've tried both options but still drips and the banjo bolt is now rounded from trying to tighten it so need to order a new one along with new crush washers.
For those that have done the job before, is it definitely 2 crush washers per hose please? Looks like it should be based on the hose surfaces.
I've double checked there's nothing on the caliper surface preventing it sealing so maybe there's a trick I've missed?
The hose is a porsche part.
I was prepared for the hard line being a pig to unscrew, which it was, but there's always extra unpredictable fun to be had with these jobs.
Thanks,
Gary
Old thread but this was the only one I could find in a search.
Just replaced my front brake hose and its dripping at the caliper end without even applying the brakes.
In this chat everyone says to put a crush washer either side of the hose, but PET only shows one on the bolt side?
I've tried both options but still drips and the banjo bolt is now rounded from trying to tighten it so need to order a new one along with new crush washers.
For those that have done the job before, is it definitely 2 crush washers per hose please? Looks like it should be based on the hose surfaces.
I've double checked there's nothing on the caliper surface preventing it sealing so maybe there's a trick I've missed?
The hose is a porsche part.
I was prepared for the hard line being a pig to unscrew, which it was, but there's always extra unpredictable fun to be had with these jobs.
Thanks,
Gary
Last edited by gazfish; 08-08-2021 at 01:25 PM.
The following users liked this post:
gazfish (08-08-2021)
08-08-2021, 02:28 PM
#20
Drifting
Hi All,
Old thread but this was the only one I could find in a search.
Just replaced my front brake hose and its dripping at the caliper end without even applying the brakes.
In this chat everyone says to put a crush washer either side of the hose, but PET only shows one on the bolt side?
I've tried both options but still drips and the banjo bolt is now rounded from trying to tighten it so need to order a new one along with new crush washers.
For those that have done the job before, is it definitely 2 crush washers per hose please? Looks like it should be based on the hose surfaces.
I've double checked there's nothing on the caliper surface preventing it sealing so maybe there's a trick I've missed?
The hose is a porsche part.
I was prepared for the hard line being a pig to unscrew, which it was, but there's always extra unpredictable fun to be had with these jobs.
Thanks,
Gary
Old thread but this was the only one I could find in a search.
Just replaced my front brake hose and its dripping at the caliper end without even applying the brakes.
In this chat everyone says to put a crush washer either side of the hose, but PET only shows one on the bolt side?
I've tried both options but still drips and the banjo bolt is now rounded from trying to tighten it so need to order a new one along with new crush washers.
For those that have done the job before, is it definitely 2 crush washers per hose please? Looks like it should be based on the hose surfaces.
I've double checked there's nothing on the caliper surface preventing it sealing so maybe there's a trick I've missed?
The hose is a porsche part.
I was prepared for the hard line being a pig to unscrew, which it was, but there's always extra unpredictable fun to be had with these jobs.
Thanks,
Gary
08-08-2021, 04:33 PM
#21
Rennlist Member
Thanks both, new bolts and washers on the way and read the WSM to get the torque spec. Looking forward to silent brakes after fitting the dampers that have always been missing.
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Bertrand Daoust (08-08-2021)
