I just bought a 6.0 from a local salvage yard and was wondering how do I know what year the engine was built. I was told it came from an '06 GMC van, but it has a cable throttle body. Is there a VIN plate or code on the block somewhere?
Thanks, TY
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I just bought a 6.0 from a local salvage yard and was wondering how do I know what year the engine was built. I was told it came from an '06 GMC van, but it has a cable throttle body. Is there a VIN plate or code on the block somewhere?
Thanks, TY
Well, this isn't total concrete way to decipher the year and type of 6.0L, but the LQ4 motors came with 317 casting heads. The LQ9s came with 035 casting heads. The only other way to find out is to remove the head from the motor. You might want to do this anyway to go over and fully inspect and clean it before you go off and install it. If the head bolts are of varying sizes, then you have an 03 and older 6.0L. If the head bolts are of all the same size, then you have an 04 and newer. And when you do take the heads off, it is a sure-fire way to discover if it is an LQ4 or LQ9. The LQ9s have flat top pistons--and the LQ4s have dish top pistons.
wow Tyler..that was informative..you sound like you know what your talking about and you didnt throw in any gay comments...lol I knew you could do it :)
Thanks Mister! :thumb:
About the head bolts, in 05+ the lq9 and lq4 head bolts are all the same size.Quote:
Originally Posted by txarkitekt
in 99-04 the lq4 head bolts have 2 sizes. REALLY long and short.
03 an 04 the lq9 head bolts are 2 sizes. Just went threw that my self last month :P
Ummm...I think my LQ9 came with 317's?
So did mine.Quote:
Originally Posted by SCIV
Yep as far as I know all 6.0L truck motors, regardless of LQ4 or LQ9 have 317 heads.
05+ LQ4 engines got the beefed rods and LS2 style timing chain and cam bearings as well.
Good breakdown Quik.
From what I read, the 317s cam on the 01 and up LQ4 head. And the 035 came on the 02 and up LQ9. The only differnce between the 317 and 035 is the casting process. The 317 used the sand cast, and the 035 were die cast. Die casting is a more reliable casting process...
are you sure about the 04+ ? When i was at GM getting head bolts, they said 05+ is same size not 04 but idkQuote:
Originally Posted by Quik
Weird. Thanks for the infoQuote:
Originally Posted by Quik
Oh, I am not doubting you at all Quik. I just wanted to include the link where I got my info from. And considering it was from LS1Tech, I thought it was reliable...
Ricky--I thought the dealer said it was only 03 that were different...as in different head bolt sizes for the 03 and 04 and up had the same head bolt size... same as the 5.3L and 4.8L...
Thanks for the help guys. It has 317 heads and I'm going to boroscope the cylinders to see how it looks in there. Also the engine has no EGR so it has to be newer than '04 right?
Yeah, a boroscope will let you look in there and see your piston heads. Or, like I said previously, it would be a good idea to break that motor down to clean and inspect it---and then once the heads are off look at the piston heads then. I am serious man, the intake and combustion chambers will be pretty dirty and gummed up from the oil vapor recirculation system.
I think the EGR was stopped on the 02 models. The 2003-2007 Classic did not have EGR. Can someone confirm this?
Tyler, who knows I forget by now. I have new things on my mind :lol: :burnrub:
You left that completely open for me to rip you a new one, but since we have so many whiny bitches, I am going to refrain from making some 100% hilarious comments...
PM SENT TO MOD lol jk rip it to me :sadnana:Quote:
Originally Posted by txarkitekt
Everything i found says 02 and older tyler so you're probably right.
Quote:
Originally Posted by ChevyLee
I would, but I am tired of hearing people bitch and complain... :sadnana: