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NJ John
Samba Member
Joined: September 21, 2007
Posts: 2215
Location: HdG, MD & NJ
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 Posted: Fri Dec 30, 2016 2:50 pm Post subject: Anything special about caliper bolts? |
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I'm piecing together a disc brake conversion and don't have the bolts that hold the caliper to the spindle. Anything special, besides strong grade metric bolts?
All stock parts.
Thanks
_________________
1973 standard, yellow, lowered, 3” narrowed front, 1600 blo-thru turbo w/single dell 15.4@86, so far
11.41 et buggy. Long gone
Let’s go O’s! Let’s go O’s!
https://www.youtube.com/@AirSpooledGarage |
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UK Luke 72
Samba Member
Joined: September 07, 2011
Posts: 2867
Location: Little Britain
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| Posted: Fri Dec 30, 2016 4:03 pm Post subject: Re: Anything special about caliper bolts? |
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| Mild steel, BZP >10.9. Not Stainless. |
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 21507
Location: Oklahoma City
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| Posted: Fri Dec 30, 2016 4:06 pm Post subject: Re: Anything special about caliper bolts? |
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| NJ John wrote: |
I'm piecing together a disc brake conversion and don't have the bolts that hold the caliper to the spindle. Anything special, besides strong grade metric bolts?
All stock parts.
Thanks |
Nothing super special. The surface treatment is up to you...but I avoid yellow Zinc and CAD plated for the bolts and pins on brakes.
Even though "most" zinc and cad treatments protect against corrosion, there have been numerous issues ...most specifically a large recall from GM years back because certain types of cad plate reacted with salt brine and heat from the brakes...in a galvanic fashion (more specifically as a sympathetic cathode) and caused excessively fast corrosion....causing bolts to be unremoveable without twisting them off.
Use class 10.9 minimum. Class 12.9 if you can get them. I look for the black phosphate coated ones and use a very small amount of anti-seize on them...very then coat brushed on and then wiped of to just even "color" the threads.
Ray |
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NJ John
Samba Member
Joined: September 21, 2007
Posts: 2215
Location: HdG, MD & NJ
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| Posted: Sat Dec 31, 2016 10:55 am Post subject: Re: Anything special about caliper bolts? |
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Thanks for the info.
_________________
1973 standard, yellow, lowered, 3” narrowed front, 1600 blo-thru turbo w/single dell 15.4@86, so far
11.41 et buggy. Long gone
Let’s go O’s! Let’s go O’s!
https://www.youtube.com/@AirSpooledGarage |
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henk
Samba Member
Joined: June 28, 2006
Posts: 157
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| Posted: Sun Jan 01, 2017 3:50 am Post subject: Re: Anything special about caliper bolts? |
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I bought some original bolts for the 944 calipers on my bus.
I also thought they would be a high grade bollt but they are 8.8 only!
Henk!!! |
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 21507
Location: Oklahoma City
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| Posted: Sun Jan 01, 2017 8:58 am Post subject: Re: Anything special about caliper bolts? |
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| henk wrote: |
I bought some original bolts for the 944 calipers on my bus.
I also thought they would be a high grade bollt but they are 8.8 only!
Henk!!! |
Some were class 8.8.....and is also why most of the texts recommend replacing the caliper bolts at each rebuild. Its why the better caliper kits come with new bolts and new locking plates.
I say most......because many of the caliper kits come with class 10.9 boltw and a few of the parts lists show class 10.9 bolts.
Ray |
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