Rebuild? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

softballnrd27 · 03-01-2011, 07:10 AM

At what mileage would you consider a rebuild neccesary on a LS?

**Clyde65** · 03-01-2011, 10:37 AM

If it were me, the use of it, history and probably anything over 150K would be a candidate.

for instance, if it had 150K miles on it and I was going to use it for a DD, then I probably wouldnt if it looked good inside.

if it looked even questionable at 50K, and I wanted it for a DD, I would rebuild it.

Saying all that, I know of some trucks with 5.3 and 6.0's with 260K miles and still going strong, because they were/are well cared for.

Big Port Jimmy 6 · 03-01-2011, 10:28 PM

250k is no sweat. The shop truck has 120k on the factory plugs. Jay

softballnrd27 · 03-02-2011, 01:26 AM

I just want to know what to look for when I buy my motor. I am going to try and find something in the 50-75k range so I don't have to rebuild and I can put that money towards other stuff for the truck.

swb85 · 03-02-2011, 10:37 AM

Try to pull a valve cover and look for any signs of neglected oil changes, see if they'll let you bring a leakdown tester and check for ring/valve seal. If it holds compression and looks fairly clean then it's likely good to go.
We have a local guy that pulled a 150k mile 5.3 out of a junkyard and put it in a gutted RX7 with a 78mm turbo. The only changes he made to the engine were LS9 head gaskets, head studs, cam & pushrods. That little car went 8.95 @ 154mph shoving ~20psi down it's throat.....and that old junkyard 5.3 hasn't skipped a beat!

**Clyde65** · 03-02-2011, 11:15 AM

what area of the country do you live?

LKQ has motors ( 5.3) with little mileage for $1500 or so.

softballnrd27 · 03-03-2011, 12:15 AM

I live in NC but I am in Afghanistan right now. I am looking for a 6.0l and I want to get one before I come home. I have a few emails out to find some more info on a few motors.

03-01-2011, 07:10 AM	#1
softballnrd27 Always a work in progress Join Date: Jun 2007 Location: Harker Heights, TX Posts: 1,599	Rebuild? At what mileage would you consider a rebuild neccesary on a LS? __________________ USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168

03-01-2011, 10:37 AM	#2
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,546	Re: Rebuild? If it were me, the use of it, history and probably anything over 150K would be a candidate. for instance, if it had 150K miles on it and I was going to use it for a DD, then I probably wouldnt if it looked good inside. if it looked even questionable at 50K, and I wanted it for a DD, I would rebuild it. Saying all that, I know of some trucks with 5.3 and 6.0's with 260K miles and still going strong, because they were/are well cared for. __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

03-01-2011, 10:28 PM	#3
Big Port Jimmy 6 Addicted to Rust Join Date: Dec 2009 Location: Abbeville SC Posts: 1,030	Re: Rebuild? 250k is no sweat. The shop truck has 120k on the factory plugs. Jay __________________ Current trucks: (48 GMC100 320 inliner) Gone (48 Suburban in pieces) Sold 87 GMC CCSB 5.3 4l60E Daily Driver ECTA National record holder XO/PP We never really grow up, we just learn how to act in public.

03-02-2011, 01:26 AM	#4
softballnrd27 Always a work in progress Join Date: Jun 2007 Location: Harker Heights, TX Posts: 1,599	Re: Rebuild? I just want to know what to look for when I buy my motor. I am going to try and find something in the 50-75k range so I don't have to rebuild and I can put that money towards other stuff for the truck. __________________ USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168

03-02-2011, 10:37 AM	#5
swb85 On a budget like Fred Sanford Join Date: Oct 2005 Location: Topeka, KS Posts: 2,031	Re: Rebuild? Try to pull a valve cover and look for any signs of neglected oil changes, see if they'll let you bring a leakdown tester and check for ring/valve seal. If it holds compression and looks fairly clean then it's likely good to go. We have a local guy that pulled a 150k mile 5.3 out of a junkyard and put it in a gutted RX7 with a 78mm turbo. The only changes he made to the engine were LS9 head gaskets, head studs, cam & pushrods. That little car went 8.95 @ 154mph shoving ~20psi down it's throat.....and that old junkyard 5.3 hasn't skipped a beat! __________________ '85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD

03-02-2011, 11:15 AM	#6
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,546	Re: Rebuild? what area of the country do you live? LKQ has motors ( 5.3) with little mileage for $1500 or so. __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

03-03-2011, 12:15 AM	#7
softballnrd27 Always a work in progress Join Date: Jun 2007 Location: Harker Heights, TX Posts: 1,599	Re: Rebuild? I live in NC but I am in Afghanistan right now. I am looking for a 6.0l and I want to get one before I come home. I have a few emails out to find some more info on a few motors. __________________ USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168

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