Head bolt torque.... - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

2015ghost · 09-02-2019, 09:40 PM

So while reassembling my L99 I was torqueing down the heads, but 22ftlb seemed very light. I know the 90deg then 70 def adds more but it just seems like the spec should be more like 22ftlb then 40 then 60 or whatever. Anyone else seem like this is kinda light?

Oh and I’m using new GM performance head bolts

G8One2 · 09-02-2019, 09:50 PM

Torque sound right. If you have a digital torque wrench to do the angles with, it will show you a final toque after each time you angle the bolts. Probably around 100ft/lb or more final torque after you angle it. Make sure you clean out the bolt holes of oil and debris before you put bolts in, as it could potentially break the block and throw off your torque.

2015ghost · 09-02-2019, 10:45 PM

Break the block? I would imagine you would have to crank on it for that to happen.

Aqua Blue RS/SS · 09-02-2019, 11:52 PM

Quote:

Originally Posted by 2015ghost

Break the block? I would imagine you would have to crank on it for that to happen.

Nope not really all that hard. If there’s oil or any kind of liquid In the bolt holes it can hydraulically crack the block when you torque everything down.

hammdo · 09-03-2019, 12:05 AM

https://www.camaro5.com/forums/showp...&postcount=118

https://www.camaro5.com/forums/showp...&postcount=121

-Don

G8One2 · 09-03-2019, 05:59 AM

Quote:

Originally Posted by Aqua Blue RS/SS

Nope not really all that hard. If there’s oil or any kind of liquid In the bolt holes it can hydraulically crack the block when you torque everything down.

Most definitely, I've done it before and it sucks lol

Rock-It Man · 09-03-2019, 07:39 AM

Quote:

Originally Posted by 2015ghost

So while reassembling my L99 I was torqueing down the heads, but 22ftlb seemed very light. I know the 90deg then 70 def adds more but it just seems like the spec should be more like 22ftlb then 40 then 60 or whatever. Anyone else seem like this is kinda light?

Oh and I’m using new GM performance head bolts

The 22 ft lbs is just to snug them up. After that, the correct bolt tension is achieved by turning the prescribed number of degrees.

More degrees=more bolt tension.

Torque is an indirect method of determining bolt tension and is highly variable depending on condition of the threads (friction and debris). The angle method is unaffected by the condition of the threads and is a direct indication of bolt stretch and gasket compression.

Juiced1 · 09-03-2019, 09:56 AM

The second run of torque angle gets pretty tough if you don't have a good breaker bar/torque wrench. You'll want some leverage.

hammdo · 09-03-2019, 10:36 AM

What I used to torque the heads (and all angle torqued items - digital and audio):

-Don

Aqua Blue RS/SS · 09-03-2019, 10:44 AM

Quote:

Originally Posted by hammdo

What I used to torque the heads (and all angle torqued items - digital and audio):

-Don

That’s a real good buy no doubt. Snap on wants 700+ for there’s.

hammdo · 09-03-2019, 12:45 PM

Yep... $129.99 works great too...

https://www.eastwood.com/digital-ele...2in-drive.html

-Don

G8One2 · 09-03-2019, 01:04 PM

Wow that's a great price for a digital torque wrench. I wonder how it compares to the snap on.

gunchamp · 09-03-2019, 04:26 PM

Quote:

Originally Posted by G8One2

Wow that's a great price for a digital torque wrench. I wonder how it compares to the snap on.

It does well. The snap on is so over priced, its not even an option for me.

Rock-It Man · 09-03-2019, 06:36 PM

It's pretty easy to visualize 90 deg or 45 deg. 70 deg is a little tougher.

It's cool that the same gyros that are in your cell phone are now being installed in wrenches to measure degrees turned.

09-02-2019, 09:40 PM	#1
2015ghost Drives: 2015 2SS Stock Join Date: Sep 2018 Location: Texas Posts: 73	Head bolt torque.... So while reassembling my L99 I was torqueing down the heads, but 22ftlb seemed very light. I know the 90deg then 70 def adds more but it just seems like the spec should be more like 22ftlb then 40 then 60 or whatever. Anyone else seem like this is kinda light? Oh and I’m using new GM performance head bolts __________________ 2015 2SS auto. AGP twin turbo, LS9 cam, BTR 660 springs, LS9 Gaskets, ARP studs, 400lph UPP fuel system, MBRP XP 3” cat back, 305/30 Micky Thompson Sport comp tires. 12” Fockford fosgate P1, Rockford Fosgate 600w amp.

09-02-2019, 10:45 PM	#3
2015ghost Drives: 2015 2SS Stock Join Date: Sep 2018 Location: Texas Posts: 73	Break the block? I would imagine you would have to crank on it for that to happen. __________________ 2015 2SS auto. AGP twin turbo, LS9 cam, BTR 660 springs, LS9 Gaskets, ARP studs, 400lph UPP fuel system, MBRP XP 3” cat back, 305/30 Micky Thompson Sport comp tires. 12” Fockford fosgate P1, Rockford Fosgate 600w amp.

09-03-2019, 12:05 AM	#5
hammdo 'It's an experiment' Drives: [COTW 2/09/15] '11 GPI LSA SC Z/LE Join Date: May 2014 Location: Dallas TX Posts: 8,709 View My Garage	https://www.camaro5.com/forums/showp...&postcount=118 https://www.camaro5.com/forums/showp...&postcount=121 -Don __________________ 747 RWHP 794 RWTQ "Horsepower sells cars, torque wins races." - Enzo Ferrari See My Build: http://www.camaro5.com/forums/showthread.php?t=385577

09-03-2019, 10:36 AM	#9
hammdo 'It's an experiment' Drives: [COTW 2/09/15] '11 GPI LSA SC Z/LE Join Date: May 2014 Location: Dallas TX Posts: 8,709 View My Garage	What I used to torque the heads (and all angle torqued items - digital and audio): -Don __________________ 747 RWHP 794 RWTQ "Horsepower sells cars, torque wins races." - Enzo Ferrari See My Build: http://www.camaro5.com/forums/showthread.php?t=385577

09-02-2019, 09:50 PM	#2
G8One2 Drives: 2014 Camaro 2SS Join Date: Feb 2015 Location: Metro Detroit Posts: 492	Torque sound right. If you have a digital torque wrench to do the angles with, it will show you a final toque after each time you angle the bolts. Probably around 100ft/lb or more final torque after you angle it. Make sure you clean out the bolt holes of oil and debris before you put bolts in, as it could potentially break the block and throw off your torque.

09-03-2019, 09:56 AM	#8
Juiced1 Account Suspended Drives: 2012 2SS CAMARO 45th Join Date: Apr 2011 Location: St. Charles, IL Posts: 18,648	The second run of torque angle gets pretty tough if you don't have a good breaker bar/torque wrench. You'll want some leverage.

09-03-2019, 01:04 PM	#12
G8One2 Drives: 2014 Camaro 2SS Join Date: Feb 2015 Location: Metro Detroit Posts: 492	Wow that's a great price for a digital torque wrench. I wonder how it compares to the snap on.

09-03-2019, 06:36 PM	#14
Rock-It Man 376 cubic inches of fun Drives: 2023 Camaro ZL1 A10 Join Date: Jul 2010 Location: MA Posts: 4,043 View My Garage	It's pretty easy to visualize 90 deg or 45 deg. 70 deg is a little tougher. It's cool that the same gyros that are in your cell phone are now being installed in wrenches to measure degrees turned.