OEM 14mm crash bolt torque spec? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

SmoothIsSlow · 07-07-2019, 11:00 PM

Hi all!
I installed my SPC lower eccentric bolt today and moved the OEM lower bolt to the top strut hole.

I torqued the SPC bolt to 97 ft/lb per instruction. My understanding is that the OEM lower bolt is the OEM crash bolt for the top hole, as such, I torqued it do 114 ft/lb per this shop manual:

Was my understanding correct? Or does the top 14mm bolt now have to be torqued down more since it's in a larger diameter hole?

Thanks! Can't wait to get the car on track

Mr.ac · 07-07-2019, 11:07 PM

I say meet them in the middle.
It's torqued at lest.
Should be fine.

SmoothIsSlow · 07-07-2019, 11:09 PM

Quote:

Originally Posted by Mr.ac

I say meet them in the middle.
It's torqued at lest.
Should be fine.

Thanks!

Meet them in the middle? According to the shop manual, both upper and lower bolts should be torqued to 114

humfrz · 07-07-2019, 11:31 PM

Quote:

Originally Posted by SmoothIsSlow

Hi all!
I installed my SPC lower eccentric bolt today and moved the OEM lower bolt to the top strut hole.

I torqued the SPC bolt to 97 ft/lb per instruction. My understanding is that the OEM lower bolt is the OEM crash bolt for the top hole, as such, I torqued it do 114 ft/lb per this shop manual:

Was my understanding correct? Or does the top 14mm bolt now have to be torqued down more since it's in a larger diameter hole?

Thanks! Can't wait to get the car on track

I would say that they are both good-n-tight the way you tightened them down. Any more and I reckon the bolt/nut is going to come off in your hand/socket.

humfrz

wparsons · 07-09-2019, 11:20 AM

Quote:

Originally Posted by SmoothIsSlow

Was my understanding correct? Or does the top 14mm bolt now have to be torqued down more since it's in a larger diameter hole?

Torque spec is for bolt stretch and clamping force, the diameter of the hole doesn't matter.

What you will want to do is loosen both bolts with the weight of the car on the wheels, that'll settle the car to max negative camber. If you need to dial it back at all, do that with the lobed bolts in the bottom holes (also with the weight of the car on the wheels).

07-07-2019, 11:00 PM	#1
SmoothIsSlow Member Join Date: May 2019 Drives: BRZ Location: WA Posts: 58 Thanks: 32 Thanked 14 Times in 12 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	OEM 14mm crash bolt torque spec? Hi all! I installed my SPC lower eccentric bolt today and moved the OEM lower bolt to the top strut hole. I torqued the SPC bolt to 97 ft/lb per instruction. My understanding is that the OEM lower bolt is the OEM crash bolt for the top hole, as such, I torqued it do 114 ft/lb per this shop manual: Was my understanding correct? Or does the top 14mm bolt now have to be torqued down more since it's in a larger diameter hole? Thanks! Can't wait to get the car on track

07-07-2019, 11:07 PM	#2
Mr.ac [insert cool phrase here] Join Date: Aug 2015 Drives: BRZ Premium Location: Central Coast CA Posts: 2,369 Thanks: 709 Thanked 1,558 Times in 930 Posts Mentioned: 30 Post(s) Tagged: 0 Thread(s)	I say meet them in the middle. It's torqued at lest. Should be fine. __________________ New daily driver - Subaru BRZ Premium Weekend fun/track car - '91 MR2 Turbo Gen3 Old daily driver - '88 MR2 Supercharged

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