5.3 Vortex motor question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

David623 · 01-08-2013, 05:09 PM

I just picked up my motor, and I have a few questions of concern? 1. I was told I was getting a 2003 5.3 Vortex motor, transmission, and transfer case, what I got when I ran the vin# it came out to be out of a 1999 Silvarado. The motor has been completely rebuilt. Should I have any concern about the motor? 2. It also went $1500 over original estimate. Is there a difference between a 1999 vrs 2003 motor?

Firebirdjones · 01-08-2013, 05:59 PM

There were some changes made like camshaft profiles and compression ratios depending on the model. If it's been rebuilt it's hard to say what you have now unless machine shop provided you with specifics on the build.

I'm not as familiar with the 5.3's on this fact but I can tell you that the 6.0's used cast iron heads up through about 2000 and didn't get aluminum heads until 2001.

blazer1972 · 01-09-2013, 01:17 AM

if u still have the a 350 tranny and transfer case i will keep it in the truck, both will work great, but fixing a 350 is cheaper in the future. if engine is rebuild it will work as new,

OldCreek · 01-09-2013, 02:25 PM

You should post over in the LSx section in the engine area.

Probably, you're o.k. as long as you trust your engine builder...

truckeez · 01-10-2013, 08:45 PM

the 2002 earlier are worst for the piston slap problems so the guy didn't want to tell the truth--bad for gettin rid of it.

01-08-2013, 05:09 PM	#1
David623 Registered User Join Date: Oct 2012 Location: Plymouth In. Posts: 100	5.3 Vortex motor question I just picked up my motor, and I have a few questions of concern? 1. I was told I was getting a 2003 5.3 Vortex motor, transmission, and transfer case, what I got when I ran the vin# it came out to be out of a 1999 Silvarado. The motor has been completely rebuilt. Should I have any concern about the motor? 2. It also went $1500 over original estimate. Is there a difference between a 1999 vrs 2003 motor?

01-08-2013, 05:59 PM	#2
Firebirdjones Registered User Join Date: Oct 2009 Location: Prescott, Arizona Posts: 2,396	Re: 5.3 Vortex motor question There were some changes made like camshaft profiles and compression ratios depending on the model. If it's been rebuilt it's hard to say what you have now unless machine shop provided you with specifics on the build. I'm not as familiar with the 5.3's on this fact but I can tell you that the 6.0's used cast iron heads up through about 2000 and didn't get aluminum heads until 2001.

01-09-2013, 01:17 AM	#3
blazer1972 Registered User Join Date: Oct 2012 Location: CA Posts: 45	Re: 5.3 Vortex motor question if u still have the a 350 tranny and transfer case i will keep it in the truck, both will work great, but fixing a 350 is cheaper in the future. if engine is rebuild it will work as new,

01-09-2013, 02:25 PM	#4
OldCreek Registered User Join Date: Jan 2007 Location: Central Coast California Posts: 1,026	Re: 5.3 Vortex motor question You should post over in the LSx section in the engine area. Probably, you're o.k. as long as you trust your engine builder... __________________ 1972 K20 Suburban 5.7/700r4/NP205 Dana 44/H052 Sold 1972 C10 5.3L/4L60E 12bolt 5Lug - Sold 1971 K5 Blazer 6.0L LQ9 4L60E NP205 Dana 44/H052!!! 1970 K3500 1ton CrewCab 8.1L/Allison1000/NP205 Dana 60/14B!!!! - Sold 1984 K10 SWB 7.4L/4L80e/NP208 Corp 10/12 bolt Sold 1988 V30 CCLB 7.4L/TH400/NP205/Dana 60/Dana 70/3.73!!! (Sold) 2003 K2500HD 8.1/Allison1000/NP263

01-10-2013, 08:45 PM	#5
truckeez Registered User Join Date: Feb 2010 Location: Cruzeville Posts: 219	Re: 5.3 Vortex motor question the 2002 earlier are worst for the piston slap problems so the guy didn't want to tell the truth--bad for gettin rid of it. Last edited by truckeez; 01-10-2013 at 08:52 PM.



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