BRAKE CALIPER CAPSCREWS. S/S REPLACEMENT?
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- el-nicko
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BRAKE CALIPER CAPSCREWS. S/S REPLACEMENT?
Is it possible (safe? ) to replace the 4 capscrews that hold the two halves of the (3)calipers together (mine are really manky ) with stainless ones without draining and dismantling the unit? One at a time maybe? Has anyone done this? What type/size do I need?
.
Mr. Spock is my role model so be advised; I possess no (discernible) sense of humour.
It's all VFR (DCT) round here now. STILL missing my 1100s tho.
Mr. Spock is my role model so be advised; I possess no (discernible) sense of humour.
It's all VFR (DCT) round here now. STILL missing my 1100s tho.
Just hot-bolt them - no problem.
I think they are M8, but can't remember the length.
Take one out, measure it and return it - then go out and buy the stainless ones.
Get decent stainless, though
make sure you smear oil on the stainless bolts (and if hot-bolting - I would use molykote, as you are not opening the caliper mating-faces)
Al
I think they are M8, but can't remember the length.
Take one out, measure it and return it - then go out and buy the stainless ones.
Get decent stainless, though
make sure you smear oil on the stainless bolts (and if hot-bolting - I would use molykote, as you are not opening the caliper mating-faces)
Al
If I am ever on life support - Unplug me......
Then plug me back in..........
See if that works .....
Then plug me back in..........
See if that works .....
- el-nicko
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- Joined: Tue Mar 13, 2012 3:04 pm
- Location: Nick from HEREFORDSHIRE, The Oceanian province of Airstrip One.
Well I've removed a bolt and sized it (M8x40) but nothing's ever straight-forward with BMW is it. The head's a different shape from a standard cap screw and they're 'waisted' down to 7m/m for the part of their length that's exposed when they're fitted. BTW, What's 'Hot-Bolt' mean Al?
.
Mr. Spock is my role model so be advised; I possess no (discernible) sense of humour.
It's all VFR (DCT) round here now. STILL missing my 1100s tho.
Mr. Spock is my role model so be advised; I possess no (discernible) sense of humour.
It's all VFR (DCT) round here now. STILL missing my 1100s tho.
Sorry - my post was a bit superfluous - I started it, read a couple of e-mails, and by the time I had completed the post - it had already been suggested.
Hot-bolting is just changing out bolts one at a time. More often than not - on live low pressure systems.
Al
Hot-bolting is just changing out bolts one at a time. More often than not - on live low pressure systems.
Al
If I am ever on life support - Unplug me......
Then plug me back in..........
See if that works .....
Then plug me back in..........
See if that works .....
I straight swapped one at a time, M8 X 40; and ground the ends off if they protruded beyond the caliper body. Great fun getting the OE bolts out I recall. It is also worth remembering there at least two grades of stainless bolts (A2; A4 I think) + the awful inferior Chinese ones. I always fit marine quality. The price is a useful gauge.
Last edited by oyster on Sun Jul 15, 2012 5:17 pm, edited 1 time in total.
Oyster. 1999 R1100S. Almost original.
- el-nicko
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- Posts: 1562
- Joined: Tue Mar 13, 2012 3:04 pm
- Location: Nick from HEREFORDSHIRE, The Oceanian province of Airstrip One.
Blackal wrote:Hot-bolting is just changing out bolts one at a time. More often than not - on live low pressure systems.
Al
Cheers Al, I learn something every visit.
Just ordered these (x2)
.
Mr. Spock is my role model so be advised; I possess no (discernible) sense of humour.
It's all VFR (DCT) round here now. STILL missing my 1100s tho.
Mr. Spock is my role model so be advised; I possess no (discernible) sense of humour.
It's all VFR (DCT) round here now. STILL missing my 1100s tho.
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- Location: DEVON
- el-nicko
- Member
- Posts: 1562
- Joined: Tue Mar 13, 2012 3:04 pm
- Location: Nick from HEREFORDSHIRE, The Oceanian province of Airstrip One.
I can see there may be a reason BM waisted (Disc clearance? Do they run that close? ) the OE bolts. But why go to the trouble of fitting a cap screw with a head shape that at least I've never seen before?
.
Mr. Spock is my role model so be advised; I possess no (discernible) sense of humour.
It's all VFR (DCT) round here now. STILL missing my 1100s tho.
Mr. Spock is my role model so be advised; I possess no (discernible) sense of humour.
It's all VFR (DCT) round here now. STILL missing my 1100s tho.
I don't remember there being locating dowels between the two caliper halves.....
That being the case - the increased diameter at the cap-head end is for location of the two halves- I would reckon.
On more critical bolts (bottom end bolts) the main structure of the bolt is reduced from the thread diameter - to prevent stretch of the bolt in the thread-section. You'll often see short sections of the bolt increased out to the thread diameter - to locate the bolt in the hole.
Al
That being the case - the increased diameter at the cap-head end is for location of the two halves- I would reckon.
On more critical bolts (bottom end bolts) the main structure of the bolt is reduced from the thread diameter - to prevent stretch of the bolt in the thread-section. You'll often see short sections of the bolt increased out to the thread diameter - to locate the bolt in the hole.
Al
If I am ever on life support - Unplug me......
Then plug me back in..........
See if that works .....
Then plug me back in..........
See if that works .....
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