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post #1 of 4 Old Aug 23rd, 2008, 7:28 pm Thread Starter
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Break rotor and caliper bolts

Id like to replace the bolts that secure the front rotor. The heads are rusted.
Can I use chromed bolts My hardware store carries or do I need a hardened bolt
ALso want to replace the bolts that secure the caliper
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post #2 of 4 Old Aug 23rd, 2008, 9:09 pm
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Re: Break rotor and caliper bolts

I wouldn't use any "off the shelf" hardware, unless it was grade 8.

A little rust on the head of a bolt could always be just cleaned off, no?

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post #3 of 4 Old Aug 23rd, 2008, 10:58 pm
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Re: Break rotor and caliper bolts

Quote:
Originally Posted by ltlfeat
Id like to replace the bolts that secure the front rotor. The heads are rusted.
Can I use chromed bolts My hardware store carries or do I need a hardened bolt
ALso want to replace the bolts that secure the caliper
The rotor bolts are not standard bolts at all, so you will not likely find replacements easily. They are special "Shoulder Bolts". I don't know about the '02 and later LTs, but the bolts for the calipers on the earlier ones could possibly be replaced with somewhat standard hardware.

If you must, you can just get another set and have them chromed. Be VERY aware though that if the plating shop is not a VERY GOOD one, with the proper process controls, that chrome plating improperly done can cause
"Hydrogen Emvrittlement". That is a nasty little thing that can cause the parts to crack later. For that reason, I myself would NEVER put chrome plated bolts in any critical area.

Avoid Stainless Steel also, as it is much weaker than the standard bolts used for the calipers. I think I remember that the caliper bolts were grade 10.9. Should be stamped on the head. If they are grade 8.8, then a good stainless bolt will be about the same strength, only slightly weaker. However, the caliper bolts are threaded into aluminum, and stainless in aluminum can cause severe galling of the threads.

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post #4 of 4 Old Aug 23rd, 2008, 11:02 pm
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Re: Break rotor and caliper bolts

Quote:
Originally Posted by Tat_n_Telle
I wouldn't use any "off the shelf" hardware, unless it was grade 8.

A little rust on the head of a bolt could always be just cleaned off, no?
The grades on metric fasteners do not follow the same grade numbering system as we use in the US.

A grade 8 bolt in the US is somewhere between DIN grades 8.8 and 10.9.

I don't want to achieve immortality through my work...I want to achieve it through not dying.

David Shealey
Dandridge, TN
EX: '01 Black LT, BAT BYKE (Totaled at 110,000 miles)
IBA SS, BB, BBG, 10/10ths.
No bike now, but maybe in the future.
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