Scotty2Hotty Posted June 20, 2013 Report Share Posted June 20, 2013 Picked up what I was told to be a re-built 5.3, but had some 6.0 stampings on it. It's been a while since I've played with an LQ4 to remember the difference. Here's some numbers and pics to help. Thanks. http://i615.photobucket.com/albums/tt236/Scotty_Sapper/1371691261.jpg http://i615.photobucket.com/albums/tt236/Scotty_Sapper/1371691317.jpg http://i615.photobucket.com/albums/tt236/Scotty_Sapper/1371691365.jpg http://i615.photobucket.com/albums/tt236/Scotty_Sapper/1371691411.jpg Quote Link to comment Share on other sites More sharing options...
Geeesammy Posted June 20, 2013 Report Share Posted June 20, 2013 What are the head casting numbers? If they are factory heads If my memory is right 035- 2001-2004 LQ9 873- 1999-2001 LQ4 317- 2001/2002+ LQ4 and LQ9 862, 706, 799 are all 4.8/5.3 heads I believe. Could be more, just those I remember. I'll do research to confirm. Quote Link to comment Share on other sites More sharing options...
Scotty2Hotty Posted June 20, 2013 Author Report Share Posted June 20, 2013 Forgot to yank the number off the heads. I barely had time to stare at it for 5 minutes. Quote Link to comment Share on other sites More sharing options...
Geeesammy Posted June 20, 2013 Report Share Posted June 20, 2013 Heads would be tell tale. Can go from there deciding if it is LQ4/9. Also, the previous numbers I posted seem to be correct according to two different sites. Quote Link to comment Share on other sites More sharing options...
JuicedH22 Posted June 20, 2013 Report Share Posted June 20, 2013 unless someone swapped heads.... can always take the head off, and look at the piston... that shoudl tell you quickly too... Quote Link to comment Share on other sites More sharing options...
Geeesammy Posted June 20, 2013 Report Share Posted June 20, 2013 Also, another reference stated 4.8/5.3 99+ blocks used a 12561358 casting number. LQ motors 98+ used 12573581 and 12577184, neither of these should dictate between LQ4 or LQ9 as far as I know. Quote Link to comment Share on other sites More sharing options...
Geeesammy Posted June 20, 2013 Report Share Posted June 20, 2013 unless someone swapped heads.... can always take the head off, and look at the piston... that shoudl tell you quickly too... I was going to say pull a head, but I was saving that for last...lol. Most truck motors don't get torn apart and tinkered with like an LS motor would. But who knows hahah Quote Link to comment Share on other sites More sharing options...
Scotty2Hotty Posted June 20, 2013 Author Report Share Posted June 20, 2013 The heads are 243. Quote Link to comment Share on other sites More sharing options...
MattKatz Posted June 20, 2013 Report Share Posted June 20, 2013 Is it iron or aluminum block....if its aluminum it's an ls2. Quote Link to comment Share on other sites More sharing options...
Geeesammy Posted June 20, 2013 Report Share Posted June 20, 2013 Is it iron or aluminum block....if its aluminum it's an ls2. 243 and 799 are the same heads, and to the best of my knowledge some 243 heads came factory on 5.3's. Quote Link to comment Share on other sites More sharing options...
Geeesammy Posted June 20, 2013 Report Share Posted June 20, 2013 Block casting number should be on the back of the engine, on what would be the drivers said IIRC. It will at least tell you if it's an LQ, 5.3, LS, etc. LQ blocks are the same between 4's and 9's though. Quote Link to comment Share on other sites More sharing options...
MattKatz Posted June 20, 2013 Report Share Posted June 20, 2013 It's stamped 6.0l so there is no doubt that it's a 6L. The 5.3 say 5.3 or 4.8/5.3. Yes 243's came on all kinds of motors, including 5.3's but mainly on ls6 and ls2 motors. We know it's not an ls1 based on the 6.0l stamping. Quote Link to comment Share on other sites More sharing options...
Geeesammy Posted June 20, 2013 Report Share Posted June 20, 2013 It's stamped 6.0l so there is no doubt that it's a 6L. The 5.3 say 5.3 or 4.8/5.3. Yes 243's came on all kinds of motors, including 5.3's but mainly on ls6 and ls2 motors. We know it's not an ls1 based on the 6.0l stamping. Just odd someone would say it was a rebuilt 5.3, when in reality it could be an LS2 lol. If that's the case someone got lucky as hell. Quote Link to comment Share on other sites More sharing options...
brent1976 Posted June 21, 2013 Report Share Posted June 21, 2013 The iron block 6.0L is cast on the front of the block. I'm going to guess that is an aluminum block since its stamped on, so that would be an LS2. http://i155.photobucket.com/albums/s316/brent1976_photos/null_zpsea45d551.jpg Quote Link to comment Share on other sites More sharing options...
MattKatz Posted June 21, 2013 Report Share Posted June 21, 2013 That would be a Super lucky buy if so. Quote Link to comment Share on other sites More sharing options...
Scotty2Hotty Posted June 21, 2013 Author Report Share Posted June 21, 2013 Just odd someone would say it was a rebuilt 5.3, when in reality it could be an LS2 lol. If that's the case someone got lucky as hell. If we get free time at work, we're probably going to break into it. Looking into a small cam since we'll have it apart. It's got a 24 tooth reluctor ring, so I'm thinking more LS2 at the moment. Quote Link to comment Share on other sites More sharing options...
JuicedH22 Posted June 21, 2013 Report Share Posted June 21, 2013 You cant tell if its aluminum or iron block??? that should be stupid easy... just looking at the pictures now on my PC, looks like an LS2 to me.... You scored a hell of a deal. Quote Link to comment Share on other sites More sharing options...
POS VETT Posted June 21, 2013 Report Share Posted June 21, 2013 Bring a magnet ... Quote Link to comment Share on other sites More sharing options...
Green Bastard Posted June 21, 2013 Report Share Posted June 21, 2013 Bring a magnet ... yea? Quote Link to comment Share on other sites More sharing options...
POS VETT Posted June 21, 2013 Report Share Posted June 21, 2013 Yep. Quote Link to comment Share on other sites More sharing options...
coltboostin Posted June 21, 2013 Report Share Posted June 21, 2013 LS2 instead of truck junk? Crazy! How much? Quote Link to comment Share on other sites More sharing options...
Scotty2Hotty Posted June 22, 2013 Author Report Share Posted June 22, 2013 LS2 instead of truck junk? Crazy! How much? $1,700. Quote Link to comment Share on other sites More sharing options...
GSXRAntwon Posted June 22, 2013 Report Share Posted June 22, 2013 Jesus it'll either be black with rust or bare aluminum. Take a screwdriver and scratch the block Quote Link to comment Share on other sites More sharing options...
99BlownYellowGT Posted June 22, 2013 Report Share Posted June 22, 2013 What's it going in Quote Link to comment Share on other sites More sharing options...
Cordell Posted June 22, 2013 Report Share Posted June 22, 2013 If we get free time at work, we're probably going to break into it. Looking into a small cam since we'll have it apart. It's got a 24 tooth reluctor ring, so I'm thinking more LS2 at the moment. Better plan on lifters and AFM delete, looks to have the active fuel management shit installed. Not sure of the RPO code but I'm thinking it to be for a later model truck since most trucks if not all until 2008 used a 24 tooth reluctor wheel, and AFM didn't come out until more recently. Intersting find as this doesn't seem to be a popular version of LSx, being an aluminum 6.0L with 24x crank trigger and AFM and cathedral heads. An iron block would make more sense. I look forward to seeing it apart. Isn't there a number cast on the block right behind the driver's side head? That should be the block's part number. Quote Link to comment Share on other sites More sharing options...
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