Caliper bolts

Elmo370z · 09-08-2018, 09:36 AM

Anyone know what the torque specs of the four 14mm bolts that hold the two halves of the caliper are?

JARblue · 09-08-2018, 10:07 AM

The FSM does not appear to specify the torque for these bolts on the sport brakes.

There are similar bolts (2 instead of 4) on the base brake calipers. Pages BR-39 (for front) and BR-52 (for rear) in my 2011 FSM specify 20 ft-lbs and 32 ft-lbs, respectively, for these bolts. Something in that range seems like it should be safe for the sport brake calipers. Not sure why the rear is supposed to be torqued more than the front, but I'd probably just split the difference on both F/R (~25 ft-lbs).

SouthArk370Z · 09-08-2018, 04:05 PM

There are charts on the Intertubes, eg, https://www.portlandbolt.com/technic...-torque-chart/ , that will get you close enough. FWIW, bolt torque is an indirect measurement of bolt stretch and can vary quite a bit depending on thread condition, lubrication, etc.

Rusty · 09-08-2018, 11:58 PM

Quote:

Originally Posted by SouthArk370Z

There are charts on the Intertubes, eg, https://www.portlandbolt.com/technic...-torque-chart/ , that will get you close enough. FWIW, bolt torque is an indirect measurement of bolt stretch and can vary quite a bit depending on thread condition, lubrication, etc.

There is a dry torque and a wet torque specs for some fasteners. Also percent of thread engagement.

I couldn't find the torque spec for those bolts either when I rebuilt a few others. I used a chart for bolt diameter.

https://www.fastenal.com/content/fed...0Fasteners.pdf

09-08-2018, 09:36 AM	#1 (permalink)
Elmo370z A True Z Fanatic Join Date: Apr 2013 Location: st. petersburg Posts: 5,709 Drives: 09 nissan 370z Sp M6 Rep Power: 295378	Caliper bolts Anyone know what the torque specs of the four 14mm bolts that hold the two halves of the caliper are?

09-08-2018, 10:07 AM	#2 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	The FSM does not appear to specify the torque for these bolts on the sport brakes. There are similar bolts (2 instead of 4) on the base brake calipers. Pages BR-39 (for front) and BR-52 (for rear) in my 2011 FSM specify 20 ft-lbs and 32 ft-lbs, respectively, for these bolts. Something in that range seems like it should be safe for the sport brake calipers. Not sure why the rear is supposed to be torqued more than the front, but I'd probably just split the difference on both F/R (~25 ft-lbs). __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

09-08-2018, 04:05 PM	#3 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	There are charts on the Intertubes, eg, https://www.portlandbolt.com/technic...-torque-chart/ , that will get you close enough. FWIW, bolt torque is an indirect measurement of bolt stretch and can vary quite a bit depending on thread condition, lubrication, etc. JARblue likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

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