Id'ing a LQ4 vs an LQ9
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Id'ing a LQ4 vs an LQ9
I bought an engine out of a junkyard for my turbo build. It is out of an 07 Van. It's a 6.0, but how do I tell if it's an lq4 or lq9 without pulling a head to check the pistons.
Thanks,
Frank
Thanks,
Frank
#7
Here is an answer to your question one person was right one is aluminum and the other has a cast iron block the one you have has the cast iron block which is better for turbocharging.
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Back to the OP though, you definetly have an LQ4 if its from a van.
#9
LQ4/LQ9 = Iron Blocks
LS2 = Aluminum Block
All three are 6.0L, and the LQ9 is an iron version of the LS2 but with 317 heads, versus the LS2 and the 243 heads.
#11
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So if you don't know what the motor came out of, how else can you tell the difference between a LQ4 and LQ9?
I have a 6.0 long block, and I know its an '05 model year because of the casting date on the heads (10/04).
So how else I can I tell without yanking a head to look at the pistons?
Thanks!!!
I have a 6.0 long block, and I know its an '05 model year because of the casting date on the heads (10/04).
So how else I can I tell without yanking a head to look at the pistons?
Thanks!!!
Last edited by Ford_Assassin; 07-10-2009 at 03:52 AM. Reason: Details.....
#12
http://en.wikipedia.org/wiki/GM_Vortec_engine
LQ4 has dished pistons, LQ9 has flat-top.
#13
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Have a read here:-
http://en.wikipedia.org/wiki/GM_Vortec_engine
LQ4 has dished pistons, LQ9 has flat-top.
http://en.wikipedia.org/wiki/GM_Vortec_engine
LQ4 has dished pistons, LQ9 has flat-top.
I don't want to yank off the heads to confirm if it has flat top or dished pistons on a perfectly good long block..
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Any other way to tell the difference without tearing into the motor?
Thanks again.
#19
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Man, that only took about an hour of searching. It appears that the question "What's the difference between LQ4/LQ9?" is as popular on PT.net as "What cam should I get?" on here.
http://www.performancetrucks.net/for...ght=LQ9+piston
If you look at the pictures in this link you can see the obvious difference between the LQ4 and LQ9 pistons. I would say it's no problem to identify them this way from the bottom.
http://www.performancetrucks.net/for...ght=LQ9+piston
If you look at the pictures in this link you can see the obvious difference between the LQ4 and LQ9 pistons. I would say it's no problem to identify them this way from the bottom.
Last edited by 5.3LJimmy; 07-24-2009 at 02:27 PM.