Nut torque for header to block? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Overland'n'5thGEN · 08-29-2013, 02:29 PM

Ok so swapping headers and saw I was missing a nut. Anyone have the proper torque for the nuts?

DJCarbine · 08-29-2013, 02:46 PM

Quote:

Originally Posted by Overland'n'5thGEN

Ok so swapping headers and saw I was missing a nut. Anyone have the proper torque for the nuts?

From the top of my head, I think its ~22 ft/lb. Don't have the service manual handy but I'm almost certain

6speed_Sam · 08-29-2013, 06:02 PM

22 is what my Borla instructions said. I did 24

Jaylyons1 · 09-12-2013, 03:06 PM

Quote:

Originally Posted by 6speed_Sam

22 is what my Borla instructions said. I did 24

I found a lot of mis-information in the borla instructions. I used them to aid in my rev works install but they either had a lot of typo's or just didn't know the proper bolt sizing.

I tightened mine up to 22 but I think I'm going to go 24 as well today.

AL008 · 09-12-2013, 08:11 PM

How important is it to torque up the header bolts?

nix · 09-12-2013, 08:16 PM

It's important if you don't want any leaks... then check and retorque them a week or something later after it's fully heat cycled and settled in.

AL008 · 09-12-2013, 09:14 PM

Quote:

Originally Posted by nix

It's important if you don't want any leaks... then check and retorque them a week or something later after it's fully heat cycled and settled in.

Based on 22ft lb of torque. It isn't much, so isn't that almost hand tight + max of half a turn more?

6speed_Sam · 09-12-2013, 09:26 PM

Quote:

Originally Posted by AL008

Based on 22ft lb of torque. It isn't much, so isn't that almost hand tight + max of half a turn more?

Proper torque is important so there will not be any warped flanges or leaks. Try to borrow or purchase a torque wrench.

FirestormFRS · 09-12-2013, 10:13 PM

Based solely on my own experience with other engines 22lb/ft 30nm seems reasonable. That's a lot more than hand tight + half a turn. Just do em all then go back and check em again. Gasket squish will lower the original torque on the first couple.

I'm not sure why you'd need to go back a week later. I've put on thousands of them over the years and never had one come lose a week or even a year later, that I know of.

ngabdala · 09-12-2013, 10:18 PM

22lb/ft then re-torque after a few heat cycles

nix · 09-12-2013, 11:19 PM

Quote:

Originally Posted by FirestormFRS

Based solely on my own experience with other engines 22lb/ft 30nm seems reasonable. That's a lot more than hand tight + half a turn. Just do em all then go back and check em again. Gasket squish will lower the original torque on the first couple.

I'm not sure why you'd need to go back a week later. I've put on thousands of them over the years and never had one come lose a week or even a year later, that I know of.

Flange and gaskets can tend to loosen/move around a bit after a few heat cycles.

08-29-2013, 02:29 PM	#1
Overland'n'5thGEN Senior Member Join Date: Feb 2013 Drives: 5th Gen Toyota 4Runner Location: SF Bay Area Posts: 397 Thanks: 82 Thanked 129 Times in 98 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Nut torque for header to block? Ok so swapping headers and saw I was missing a nut. Anyone have the proper torque for the nuts? __________________ Build thread for Amber

08-29-2013, 06:02 PM	#3
6speed_Sam Thumper Join Date: Dec 2012 Drives: 2013 FRS Location: Huntsville, AL Posts: 250 Thanks: 97 Thanked 59 Times in 42 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	22 is what my Borla instructions said. I did 24 __________________ Car is gone - parts for sale Last edited by 6speed_Sam; 08-29-2013 at 06:02 PM. Reason: dump

09-12-2013, 10:18 PM	#10
ngabdala Vortech Supercharged Join Date: Apr 2012 Drives: WRB BRZ 6MT LTD Location: Massachusetts Posts: 1,447 Thanks: 1,897 Thanked 467 Times in 283 Posts Mentioned: 13 Post(s) Tagged: 1 Thread(s)	22lb/ft then re-torque after a few heat cycles __________________ Powered by Vortech, ECS Tuning, and JDL Auto Design

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09-12-2013, 08:11 PM	#5
AL008 Senior Member Join Date: Jun 2012 Drives: Celica 04 Location: Brisbane Posts: 112 Thanks: 33 Thanked 9 Times in 8 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	How important is it to torque up the header bolts?

09-12-2013, 10:13 PM	#9
FirestormFRS Senior Member Join Date: Jul 2012 Drives: 2013 FR-S Location: Anytown Posts: 920 Thanks: 73 Thanked 643 Times in 302 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Based solely on my own experience with other engines 22lb/ft 30nm seems reasonable. That's a lot more than hand tight + half a turn. Just do em all then go back and check em again. Gasket squish will lower the original torque on the first couple. I'm not sure why you'd need to go back a week later. I've put on thousands of them over the years and never had one come lose a week or even a year later, that I know of.

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