Alternative for GM bolts

[Marty Z]

I know i'm new to this forum and this might have been discussed in the past, so please forgive me if this question has already been answered.

Has anyone been able to find alternative, non-TTY bolts, for the 2LS caliper bracket bolts which are part numbers

92139142 - Front
11570092 - Back

I don't mind paying the extra $50 dollars for the bolts while changing my rotors, but I don't want to have to everytime I need to remove the support for any other reason.

And last time I changed those bolts I broke a socket and breaker bar trying to get it to 90 degrees past 45 ft/lbs.

[gtstorey]

I've just been re-using mine the same as I have for 30 years. Now let everyone start flaming me. If you want to change them I would go with the equivalent of grade 8 in metric 10.9 or stronger.

[Marty Z]

Originally Posted by gtstorey

I've just been re-using mine the same as I have for 30 years. Now let everyone start flaming me. If you want to change them I would go with the equivalent of grade 8 in metric 10.9 or stronger.

So do you just torque them or do you do the extra 90 degrees?

[gtstorey]

I stopped measuring torque on most things about the same time I started on working things. I actually torqued to spec the rear caliper bolts on my first motorcycle and they then fell out after a few days. Since, then mostly torque just critical engine fasteners like head bolts. But I'm also far from a master mechanic. Although I doubt many professionals take the time to torque caliper bolts.

[Avenging Orange]

Originally Posted by gtstorey

I stopped measuring torque on most things about the same time I started on working things. I actually torqued to spec the rear caliper bolts on my first motorcycle and they then fell out after a few days. Since, then mostly torque just critical engine fasteners like head bolts. But I'm also far from a master mechanic. Although I doubt many professionals take the time to torque caliper bolts.

[Marty Z]

I just find it weird that I can't find aftermarket bolts. Oh, i'm sure they exist but I will probably have to search specifically by diameter, thread pitch, length. None of this info is available online so I will have to remove and manually measure the bolts.

[Jayjellyfish212]

I say Use the bolts again as well will be fine. I have twice so far on mine and have had no issues. I’m more than certain your not driving your car as hard as I drive mine. You can put a dab of blue lock tight on them and torque them to specs then if your lucky you might get a 90* out of the 120* angle setting. I and several others never could get a 120* on those bolts.

If they were cylinder head or internal engine bolts we were discussing then most definitely would need new ones but then you have option for reusable aftermarket ones for sure.

[Marty Z]

Ok, so here is what I found on boltdepot.com. Anyone with an engineering degree please let me know if these would be adequate alternative

Front - Metric flange bolts, Partial thread (DIN 6921), Zinc plated class 10.9 steel, 14mm x 2.0mm x 50mm.

Rear - Metric flange bolts, Partial thread (DIN 6921), Zinc plated class 10.9 steel, 12mm x 1.75mm x 50mm

[blackswan]

The part numbers are backwards below, it's:

92139142 - Back
11570092 - Front

Originally Posted by Marty Z

I know i'm new to this forum and this might have been discussed in the past, so please forgive me if this question has already been answered.

Has anyone been able to find alternative, non-TTY bolts, for the 2LS caliper bracket bolts which are part numbers

92139142 - Front
11570092 - Back

I don't mind paying the extra $50 dollars for the bolts while changing my rotors, but I don't want to have to everytime I need to remove the support for any other reason.

And last time I changed those bolts I broke a socket and breaker bar trying to get it to 90 degrees past 45 ft/lbs.

[el ess A]

Originally Posted by Marty Z

Ok, so here is what I found on boltdepot.com. Anyone with an engineering degree please let me know if these would be adequate alternative

Front - Metric flange bolts, Partial thread (DIN 6921), Zinc plated class 10.9 steel, 14mm x 2.0mm x 50mm.

Rear - Metric flange bolts, Partial thread (DIN 6921), Zinc plated class 10.9 steel, 12mm x 1.75mm x 50mm

42 bolt size is M12 x 1.75 x 51mm long, heavy head bolt. Who the heck would spec a 51 mm bolt length?

92 bolt size is M14 x 2 x 50mm long.

Those mentioned in Marty Z's post should work.