Caliper Bolt question
Drifting
Joined: Aug 2006
Posts: 1,729
Likes: 193
From: Scottsdale Arizona
The bolts that I just took out of my calipers are 2 1/2 under the head and 1 1/4 shoulder with 5 marks and a triangle. Most of these calipers have been resleeved at one time and I would think they would put new bolts in I believe the five marks signify grade 5.
I just looked at your bolt and that is the one that bolts the caliper to bracket mine is the bolts the two halves together.
I just looked at your bolt and that is the one that bolts the caliper to bracket mine is the bolts the two halves together.
Last edited by 69FASTFUN; Apr 2, 2015 at 09:13 PM.
Thread Starter
Racer
Joined: May 2014
Posts: 420
Likes: 6
From: Springfield Missouri
As for making the bolts... As I said I don't have the equipment for that. I don't have a bench vice or such to hold a bolt while I cut it to length, or files to deburr the cut. As long as the full-thread bolts I received in my order will meet the threshold of "safe to use", I can overlook that they are not 'ideal'.
The bolts that I just took out of my calipers are 2 1/2 under the head and 1 1/4 shoulder with 5 marks and a triangle. Most of these calipers have been resleeved at one time and I would think they would put new bolts in I believe the five marks signify grade 5.
I just looked at your bolt and that is the one that bolts the caliper to bracket mine is the bolts the two halves together.
I just looked at your bolt and that is the one that bolts the caliper to bracket mine is the bolts the two halves together.
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Go to the Chevy dealer. They still carry the correct Grade 8 shoulder bolts. They will have to pull out the old thick greasy parts book under the counter. They are not in the computer. I bought these a couple months ago as well as the shoulder bolts that hold the rear driveshaft Ubolts on, in stock. Find the old guy with the worn out looking Chevrolet work shirt in the parts department. 
Last edited by 63mako; Apr 2, 2015 at 10:40 PM.
Thread Starter
Racer
Joined: May 2014
Posts: 420
Likes: 6
From: Springfield Missouri
The vendor sent me the wrong bolts, but even if they hadn't they'd still not be right for the application. None of the vendors have bolts with the proper long shoulder. Do the bolts you got at the dealer have a much longer shoulder than the ones I've posted photos of? I'd love to see them because I'd be willing to pay IF they have the right length of shoulder. None of the bolts I have seen do.
I have tomorrow afternoon off, thanks to the holiday. I'll see about going by a dealer and chatting with their parts dept. Maybe I'll be able to see the bolts before buying them.
Team Owner
Joined: Jul 2004
Posts: 40,448
Likes: 793
From: Redondo Beach, California
I think the shoulder on the bolt is important. These bolts do have a "bolt" like function in mating the caliper to the bracket, but they also have a "pin" function to keep the caliper from moving laterally when the brakes are applied. I think you need a bolt with a "shoulder;"i.e a shaft to operate in the pin function. I'd think a Corvette salvage yard would be a good solution. Also, what about Stainless Steel Brake Corporation? They sell aluminum calipers that are virtual duplicates of the Delco cast iron calipers and their bolts would probably work also.
