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-   -   4.8 or 5.3? how to tell difference? (https://www.performancetrucks.net/forums/internal-engine-modifications-158/4-8-5-3-how-tell-difference-460398/)

Preston129 04-09-2010 12:11 PM

That's like the third account of a newly-bought used motor being severely disabled I've read about in the past month...I can almost believe the sellers don't know what's up with it cause who takes the time to register an account, post a sale thread, sell out of their own home and not fully expect the buyer to come back guns blazing a few days later? It's not like these ppl are selling out of the back of their truck in a parking lot. Even if i was a real prick and thought up ways to screw ppl out of money at night, I'd just put the cheapest parts I could to make sure it at least turned over when the buyer got it home.

hard to believe there are such shady ppl out there.

Gadgetized 04-09-2010 12:37 PM


Originally Posted by bohr898 (Post 4436457)
his buddy took it out of his truck for a bigger cubed 7.0 ls7 .

Sounds to me like he meant 7.0 cylinder.

Sorry to hear that. I never understood how someone can sleep at night knowing that they ripped someone off.

sdimer350 04-09-2010 06:21 PM

yep, i got hosed on ebay a year ago by some basterd. bought a 5.3 that was a pullout of a flood vehicle. i was going to bore to a 5.7 if the cylinders were too rusty. gets to my house and there is a fuckin hole the size of a tennis ball in the block right by the starter. the dumb ass forgot to inform me that they hydro-locked it and the back 2 rods came through the block. then the old head giver wouldnt even reply to my messages. Im sure he didnt know:eyes:

cvman 04-09-2010 06:31 PM

Sorry to hear about that:bang: How often do the 5.3's break the connecting rods?

EXECUTIONER6.0 04-09-2010 07:04 PM

i thought it was based on the heads

outlawz2004 04-09-2010 08:09 PM


Originally Posted by SLCviaAK (Post 4436058)
Never mind guys. I just spun the crank with one head off, the front piston dont move up and down. rod broke or something. gonna slam it back together and take it back to the guy. get my dough back or im gonna put my fist through the back of his head. maybe both. told me it was a 5.3, and its broke! Sum bitch.

Sorry dude. I didnt know really, ran good when I took it out. :nunchuk: Seriously, I hope you get a refund. Scammers are out in force lately.

SLCviaAK 04-10-2010 09:55 AM

So i little update, i went to this guys shop last night after i got off work to return his hunk of s**t and get my money back. I waste my timing driving over there for him to tell me " i dont have your money right now". WTF? I bought it from you yesterday morning dude? I get some kind of sob story, and i am getting more and more pissed. As we were "discussing" the situation, i must have been putting the fear of god in this dude cause he kept moving back and trying to put inanimate objects between me and him! My friend that came with me was trying to diffuse the situation from getting out of hand (thankfully) and suggested we take some collateral as insurance of him paying me back my $350. I now have a 1/2 inch air gun, and an almost new edelbrock carb till i get my money. He told me monday. Yeah right. Believe it when i see it. He kept saying "you just have to trust me." I told him he is up in the night if he thinks im gonna do that.

I so wanted to just blast this guys teeth through the back of his head, but that probably wouldnt have gotten my money back. And bail would probably be more than the original $350!

Preston129 04-10-2010 10:34 AM

Smart to bring someone else with more of a cooler temper. Hope this all works out for you.

AgFormula02 04-14-2010 03:57 PM


Originally Posted by acethedragon (Post 4436011)
if the block is iron, i would bet on a 4.8l. if block is aluminum, would be 5.3l HO motor. to be sure, just mike the bores to be sure. someone might have built an iron block ls1 with it. no telling its past. pretty much all three are identical externally. and if your boosting, u might wanna stay 4.8l. those motors love all the boost you can throw at them. at any rate, enjoy and have fun with your project.

Huh? The bore is the same between a 5.3 and a 4.8

08k1500_3 04-14-2010 09:18 PM

•Engine Type
V8

•Displacement
5.3L 325 CID

•RPO LM7

•VIN (T)

•Bore 96.0-96.018 mm
3.779-3.78 in

•Strok 92.0 mm
3.622 in

•Compression Ratio
9.49:1

__________________________________________________ ____________


•Engine Type
V8

•Displacement
4.8L 293 CID

•RPO LR4

•VIN (V)

•Bore 96.0-96.018 mm
3.779-3.78 in

•Stroke 83.0 mm
3.268 in


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