Did I Over Torque My Head Bolts?
#1
Did I Over Torque My Head Bolts?
Hey guys, I had to remove my driver side head due to a broken exhaust stud. I bought new a new GM MLS stock head gasket and new matching bolts (1-10 are all the same length) for my 5.3 2004+ iron block.
Okay, I found LS1HowTo.com and their head swap write-up. I followed the instructions on first torquing the M11 (1-10) bolts to 22lbs and then turning another 90 degrees, then another 90 degrees. I did this to all the M11 bolts since they are same length. Well today I read in a "How to Rebuild LSx" book that I should of only turned the M11 bolts to 70 degrees on my final pass.
Am I okay or do I need to replace those head bolts (again)?
Thanks!!!
Okay, I found LS1HowTo.com and their head swap write-up. I followed the instructions on first torquing the M11 (1-10) bolts to 22lbs and then turning another 90 degrees, then another 90 degrees. I did this to all the M11 bolts since they are same length. Well today I read in a "How to Rebuild LSx" book that I should of only turned the M11 bolts to 70 degrees on my final pass.
Am I okay or do I need to replace those head bolts (again)?
Thanks!!!
Last edited by Ford_Assassin; 08-12-2008 at 09:42 PM.
#3
Just so I am understanding you correctly. You have gone 90 and then 90 with a 2004+ block with all M11 bolts being the same length?
In 2004+ the head bolts changed and are 5mm shorter than 2003 and older bolts and you are suppose to go 90 and then 90 with bolts 1-8.
Thanks!!
In 2004+ the head bolts changed and are 5mm shorter than 2003 and older bolts and you are suppose to go 90 and then 90 with bolts 1-8.
Thanks!!