ls engine identification - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68fixeruper · 09-02-2009, 01:03 PM

i bought a 5.3 4l60e package and i was wanting to make sure its not a 4.8 how can i tell because the back of the block says 4.8/5.3

Ackattack · 09-02-2009, 02:39 PM

yep, the 5.3 and 4.8L use the same block. I believe the diffence comes from the crank only.

I would do some research on the heads. I would guess that the 4.8L use different heads than the 5.3L. This is assuming the heads haven't been swapped, but probably not.

68 short step · 09-02-2009, 06:03 PM

4.8 has a flat top piston and teh 5.3 has a dish....take the plug out and look in the cylinder with a flashlight.

68fixeruper · 09-02-2009, 07:15 PM

There has to be a easier way than that.

09-02-2009, 01:03 PM	#1
68fixeruper Registered User Join Date: Apr 2006 Location: Amarillo, Tx Posts: 267	ls engine identification i bought a 5.3 4l60e package and i was wanting to make sure its not a 4.8 how can i tell because the back of the block says 4.8/5.3

09-02-2009, 02:39 PM	#2
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,525	Re: ls engine identification yep, the 5.3 and 4.8L use the same block. I believe the diffence comes from the crank only. I would do some research on the heads. I would guess that the 4.8L use different heads than the 5.3L. This is assuming the heads haven't been swapped, but probably not. __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index

09-02-2009, 06:03 PM	#3
68 short step Senior Member Join Date: Aug 2005 Location: tulsa OK Posts: 3,070	Re: ls engine identification 4.8 has a flat top piston and teh 5.3 has a dish....take the plug out and look in the cylinder with a flashlight.

09-02-2009, 07:15 PM	#4
68fixeruper Registered User Join Date: Apr 2006 Location: Amarillo, Tx Posts: 267	Re: ls engine identification There has to be a easier way than that.



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