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06-14-2020, 10:53 PM
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#1 |
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Senior Member
 
Join Date: Jun 2019
Location: Midway USA Kentucky
Posts: 540
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LS variations?
Is there a way to tell visually a stock 6.0 Liter versus a 5.3/4.8 Liter engine? Especially if the build tag is missing from the engine?
I am fully aware a 4.8/5.3 are the same engine visually on the outside Pic for attention only. |
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06-15-2020, 06:18 AM
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#2 |
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Registered User
Join Date: Jul 2014
Location: North-central Virginia
Posts: 1,099
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Re: LS variations?
I'm reasonably certain there's a casting mark in the back of the block, after you detach the transmission. Mine had "Gen IV" cast back there, and I think it said "5.3/4.8" as well, but I'm forgetting by now.
Edit to add: it's quite possible that cast mark is on the FRONT of the block, like someone else said. It's been a while since I last saw it.
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1987 C6P V20 truck, 2010 LMG 5.3, AFM delete, 2010 Camaro exhaust manifolds, 1997 nv4500, 1991 np241c, hydroboost, 2005 14bff axle & driveshaft, drop-n-lock gooseneck, 4.10 gears, stock suspension, rims, and tires. Still a work in progress. Any questions or suggestions are welcome! Last edited by kipps; 06-15-2020 at 09:02 PM. |
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06-15-2020, 08:40 AM
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#3 |
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Senior Member
Join Date: Aug 2004
Location: Centennial, CO
Posts: 2,910
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Re: LS variations?
I know the gen3 6.0 has a cast in “6.0” on the block
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ClusterTruck: 68 C10 Bought in 89, wrecked in 03. Slow low $ rebuild started '17. 6.0 & TKO http://67-72chevytrucks.com/vboard/s...d.php?t=788602 93 K1500 Short Step, 350, NV4500, EBL flash ECU. Vortec heads & roller cam someday... 05 Jeep Wrangler Unlimited. 3” lift & 6-speed 02 E320 the insurance total “free car” 13 Tahoe LTZ |
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06-15-2020, 09:34 AM
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#4 |
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All about them K’s
 
Join Date: Jun 2014
Location: Farmington, New Mexico
Posts: 6,265
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Re: LS variations?
Behind the alternator/power steering pump bracket (drivers side front of the block) engine is an LY6 6.0 from a 2009 Silverado 2500
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Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's ‘87 IROC-Z all original 50K mile survivor TPI 305 IROC Blue ‘10 Camaro 2SS/RS Aqua Blue Metallic #93 -version 2.0 
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06-19-2020, 01:06 PM
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#5 |
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Registered User
Join Date: Dec 2012
Location: Los Banos CA
Posts: 2,705
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Re: LS variations?
If all stock the best way to find the difference between a 4.8 and 5.3 is to remove a spark plug and look inside. 4.8 has a flat top piston and a 5.3 has a dish piston.
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1956 Chevy Bel Air 2 door 1956 Chevy 210 4 Door 1970 K20 LWB project the Hulk build w/Supercharged 4.8L-ly2/4L60E HULK BUILD 1970 C10 Yellow/White Deluxe LWB w/ 5.3L-LC9/6L80E 1968 K10 LWB Dark green my son calls it "THE HULK Jr"HULK JR *SOLD* GO  GO!!!
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