Forgive me for double checking...Torque Specs
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Joined: Jun 2007
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From: Marietta, GA
Forgive me for double checking...Torque Specs
I am changing out my Z51 rotors and I have found the torque specs for the front caliper bolts at 162 ft lbs and the rears at 89 ft lbs.
Seems weird for two reasons. My C6 Z06 was the same front and rear and it as like 127 ft lbs. So to me, 162 seems really high and it also seems a bit odd to have two different specs for front and rear. I know that I am going to get yelled at for asking, but I am looking for confirmation from guys that have done it before.
By the way, it looks like I am going to have to remove the rear wheel air deflectors to have room to move the calipers enough to get the rear rotors off. Just two screws to remove the deflector?
Any other tips?
Thanks.
Tom.
Seems weird for two reasons. My C6 Z06 was the same front and rear and it as like 127 ft lbs. So to me, 162 seems really high and it also seems a bit odd to have two different specs for front and rear. I know that I am going to get yelled at for asking, but I am looking for confirmation from guys that have done it before.
By the way, it looks like I am going to have to remove the rear wheel air deflectors to have room to move the calipers enough to get the rear rotors off. Just two screws to remove the deflector?
Any other tips?
Thanks.
Tom.
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From: Marietta, GA
And I hope my impact wrench is up to the removal task...
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Dayem! That's some major torque on a bolt! I agree to the numbers from the Helms but I have seen Helms to be wrong especially on torque numbers.
Elmer
Elmer
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Quick follow-up ... all four rotors are replaced. The impact wrench grunted a bit, but it did it's job. I had tested the front bolts with my torque wrench at increasing levels (150, 155, 160 ft lbs) just to see what the factory torque was. I seemed like at 160 I got just a very slight movement. Given variability of torque wrenches I am convinced that the 162 ft lbs spec is right.
I didn't end up using the impact wrench on the rear caliper bolts. No way to get it in the tight quarters with the airflow diverters. Since those bolts are only torqued to 89 ft lbs, I could break them free with a 15 MM boxed-end wrench and a hammer. Torquing them back to 90 ft lbs required me using a smaller torque wrench again because of the tight space. But it all worked.
So today was all about getting my process re-calibrated. I used to do the street/track switch-over on my C6 Z06 pretty much in my sleep. This C7 Z51 has lots of differences, but by the end of the track season, I will once again be napping as I do the switch. lol
I didn't end up using the impact wrench on the rear caliper bolts. No way to get it in the tight quarters with the airflow diverters. Since those bolts are only torqued to 89 ft lbs, I could break them free with a 15 MM boxed-end wrench and a hammer. Torquing them back to 90 ft lbs required me using a smaller torque wrench again because of the tight space. But it all worked.
So today was all about getting my process re-calibrated. I used to do the street/track switch-over on my C6 Z06 pretty much in my sleep. This C7 Z51 has lots of differences, but by the end of the track season, I will once again be napping as I do the switch. lol
I'm Batman..
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From: Lehigh Acres FL
Tech Contributor
Quick follow-up ... all four rotors are replaced. The impact wrench grunted a bit, but it did it's job. I had tested the front bolts with my torque wrench at increasing levels (150, 155, 160 ft lbs) just to see what the factory torque was. I seemed like at 160 I got just a very slight movement. Given variability of torque wrenches I am convinced that the 162 ft lbs spec is right.
I didn't end up using the impact wrench on the rear caliper bolts. No way to get it in the tight quarters with the airflow diverters. Since those bolts are only torqued to 89 ft lbs, I could break them free with a 15 MM boxed-end wrench and a hammer. Torquing them back to 90 ft lbs required me using a smaller torque wrench again because of the tight space. But it all worked.
So today was all about getting my process re-calibrated. I used to do the street/track switch-over on my C6 Z06 pretty much in my sleep. This C7 Z51 has lots of differences, but by the end of the track season, I will once again be napping as I do the switch. lol
I didn't end up using the impact wrench on the rear caliper bolts. No way to get it in the tight quarters with the airflow diverters. Since those bolts are only torqued to 89 ft lbs, I could break them free with a 15 MM boxed-end wrench and a hammer. Torquing them back to 90 ft lbs required me using a smaller torque wrench again because of the tight space. But it all worked.
So today was all about getting my process re-calibrated. I used to do the street/track switch-over on my C6 Z06 pretty much in my sleep. This C7 Z51 has lots of differences, but by the end of the track season, I will once again be napping as I do the switch. lol
Ant
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From: Marietta, GA
Racer
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From: Leesville South Carolina
thanks
bill
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From: Saint Louis MO
St. Jude Donor '14-'15
Bill, replied to your other post. I will put both of those up for you in just a few minutes.
To answer your question, the front brake rotor bolt is specified at 106 in lb, and the rear brake rotor bolt is specified at 89 in lb.
To answer your question, the front brake rotor bolt is specified at 106 in lb, and the rear brake rotor bolt is specified at 89 in lb.
Racer
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From: Leesville South Carolina
Thank you very much. I really appreciate it.
Bill
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From: Saint Louis MO
St. Jude Donor '14-'15
Not a problem:
Front: https://www.corvetteforum.com/forums...ke-rotors.html
Rear: https://www.corvetteforum.com/forums...ke-rotors.html
Front: https://www.corvetteforum.com/forums...ke-rotors.html
Rear: https://www.corvetteforum.com/forums...ke-rotors.html
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I did my first in my car earlier this month. I found the stock brakes slowing the stock front tires to be lacking. I didn't really notice when doing the school at Spring Mountain (also on stock parts), but I guess it's more apparent at a track that I've driven in other cars.
Are you using track specific pads? It sounds like you are switching rotors? What wheels and tires have you tried?
If you are switching between street and track, what about alignment? Just leaving it in track alignment permanently?