What is an LQ4 or LQ9?
06-19-2009, 09:35 PM
#22
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I just bought a new 6.0 and I bore scoped it to see what the pistons looked like (dished or not) and they look flat with a slight ridge but also are fly cut.. is this a LQ9?
06-22-2009, 04:19 PM
#23
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More LQ-4 information Don't buy an early LQ4--you don't want the iron heads or the long crank flange. They are the same thing after that. LQ4 has a dished piston and LQ9 has a flat top. The floating wrist pin wasn't introduced until 2005 and it came along with the polymer skirted pistons to reduce the cold piston slap that is such an annoyance. The rods are no stronger--they are still powdered metal, just full floater. Almost any LS part that will work on an LS1 will work on them. They are NOT akin to the LS2 except that they displace the same thing, and that is about where it ends. You are talking two completely different generations of powerplants. Either one makes a suitable place to start from though.
07-10-2009, 03:35 AM
#24
Are talking model year or casting date?
I ask because I have a 2005 model year 6.0 long block, but the casting number is Oct 2004.
I am pretty sure its a LQ4, but can't confirm its not a LQ9 either since I don't know what it came out of.
Thanks!!
I ask because I have a 2005 model year 6.0 long block, but the casting number is Oct 2004.
I am pretty sure its a LQ4, but can't confirm its not a LQ9 either since I don't know what it came out of.
Thanks!!
