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Generation IV Internal Engine
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Old 03-08-2010, 08:09 PM   #1
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Default LQ4 Head ARP head bolt Q's

I picked up my forged iron block today for my turbo build. Now I got one question.

How can I tell what year my LQ4 is out of?

I need to get head bolts. The block is one of my spares I built, could not tell you what it came out of. All I know is, it had 317 heads. I do have the intake and all that stuff that was on it though. I cannot tell if it is a 99-04 and needs ARP 134-3609 or 2004-2006 block needing ARP 134-3610. I am guessing its a 99-04. Is there a way I can determine the block date some where?
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Old 03-08-2010, 08:29 PM   #2
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Put a piece of wire down the head bolt holes and check the depth, 3 different lengths and you know you have the 1st design.
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Old 03-08-2010, 08:30 PM   #3
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If you're trying to decide if you need head bolts all the same length or not, just stick something, like a long small screwdriver in the head bolt holes. If they are all the same depth then you need head bolts all the same length.
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Old 03-08-2010, 08:31 PM   #4
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damn, same idea at the same time.
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Old 03-08-2010, 08:49 PM   #5
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Yea that was what I was thinking the difference was but I wanted to hear it from others. I have not pulled apart the LS2 out of my truck yet so I could not confirm that just yet. Thanks guys now I need to order some ARP stuff lol.
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Old 03-08-2010, 08:49 PM
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03, 04, 06, 2004, arp, blocks, bolts, head, length, lq4, ls1, ls2, ls3, rod, studs


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