LQ4 or LQ9 swap
#11
Like I said...genius gm says mine is a 4.8...
Last edited by 1994Vmax; 06-19-2016 at 05:09 PM.
#13
TECH Senior Member
iTrader: (27)
I beg to differ my 04 "lq9" out of a caddillac according to vin on the block had dished pistons and pressed rods.... If i had planned on fi on it i would have dug deeper to get a set of floating rods, but unless a miracle happens i will probably kill this engine before i go fi on that truck anyway..... Camaro or yukon may end uo being a different story but they both already have floating rods anyway!!!!
#18
And like I said... that 8 digit dot matrix stamped "vin" on the block is utterly meaningless. Mine should have pulled up a 2005 Escalade and instead is for a 2005 4.8 Tahoe... so you really have no idea where that engine came from.. probably a 3/4 or 1 ton truck or Denali... Unless you were right there and have the vin from the actual truck it came from... which you weren't. Nobody is stamping the block of a replacement engine either.
#19
TECH Fanatic
iTrader: (9)
You will pay *at least* a $1000 premium for an LQ9 and it will limit your selection considerably if you're looking locally. A good LQ4 motor you can find all day for $1500-2500, an LQ9 expect to pay at least $2500-3500 depending on mileage and year. If you're staying n/a then the LQ9 may provide a benefit having 10:1 compression instead of 9.5:1, but you have to make a decision on whether or not that 1/2 point is worth it in terms of the additional expense of the LQ9. At the end of the day a full bolt on/ tuned LQ4 will probably run just as hard as a full bolt on/ tunes LQ9...we're talking a 1/2 point of compression here. Everyone gets such a hard on for LQ9's like they're some kind of magic motor. But if you do get fixated on being able to have LQ9 in your signature and tell your friends that it's an LQ9, make sure to grab an $80 bore scope from harbor freight to verify its a flat top piston motor. "6.0L" should be stamped into the block behind the alternator bracket. You'll have to pull the pan to see if it's a floating rod motor but that doesn't matter on an n/a build. Also from what I've read and researched they did not make any LQ9's whatsoever (even in 2002) with pressed pin rods. I recently bought an 02 LQ9 for dirt cheap with trans/ harness/ cats off craigslist and I was able to drive the truck and use a bore scope to verify it had flat tops. I don't even care if it has pressed pins or not as guys get wet over LQ9's and will pay a premium for something they don't even need most of the time...
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