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LQ4 w/243's?

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Old 07-01-2010, 02:18 AM
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Default LQ4 w/243's?
Did gm ever put 243's on lq4 engines? I came across an lq4 that was a warranty replacement, and it had 243's installed.
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Old 07-01-2010, 02:53 AM
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No, 317s with larger chambers. Someone put them on there.
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Old 07-01-2010, 07:16 AM
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I just bought a LQ9 from a escalade with 85K miles on it. Would like to switch out to some 243's. Or could I mill the 317's down alot, like .040 to get them down to 66-67cc?
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Old 07-01-2010, 11:21 AM
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Originally Posted by Beaflag VonRathburg
No, 317s with larger chambers. Someone put them on there.
That's what I was thinking. The guy said when gm put a replacement engine in his truck it came with those heads. I'm guessing someone screwed up on the part #'s

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