LQ4 / LQ9 & LS1 arp head studs
10-22-2009, 07:14 PM
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AW794,
I just read in GM High Tech, Jan 2010 page 57,pic 24, in an artical "Bookin By The Book, part 4", early style blocks use unequal-lenght M11 bolt style as do all LS blocks cast prior to 2004.
Good Luck,
I just read in GM High Tech, Jan 2010 page 57,pic 24, in an artical "Bookin By The Book, part 4", early style blocks use unequal-lenght M11 bolt style as do all LS blocks cast prior to 2004.
Good Luck,
10-22-2009, 07:51 PM
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Just another bit of info that goes along with that, if it's an early block (pre-04 sounds right) you'll have different length studs/bolts and early cam bearings. After which obviously you get newer cam bearings and all the M11 bolts will be the same length. I beileive this was a couple of the differences when GM stated calling them the gen 4. Also would have meant knock sensors not in the valley, and a cam sensor on front of the block.
10-22-2009, 07:55 PM
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On my 03 lq9, the head bolts at the back of the block on the bottom are shorter. The rest are pretty much even except for the small ones by the intake ports on the head.
10-22-2009, 08:36 PM
#5
Just another bit of info that goes along with that, if it's an early block (pre-04 sounds right) you'll have different length studs/bolts and early cam bearings. After which obviously you get newer cam bearings and all the M11 bolts will be the same length. I beileive this was a couple of the differences when GM stated calling them the gen 4. Also would have meant knock sensors not in the valley, and a cam sensor on front of the block.
arp lists the years of the difference on their website. just go look.
10-22-2009, 10:08 PM
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