nonnieselman

iTrader: (10)

get one of those lil cameras and look thru the spark plug hole..


and like they said look at the crank..

00Silv4.8

iTrader: (10)

and correction, the 4.8s are also an aluminum block.

So like nonnie said.. hope they're an honest person. When I sell my 4.8 Ill even show them the vin on my truck to verify if they want. I kinda got screwed on my 6.0 but Im getting it taken care of

hirdlej

iTrader: (31)

Take a screwdriver and stick it in the spark plug hole and feel the piston. Start at the edge and go across. If you feel it dip after about a 1/2 inch it's a 5.3. If it never dips then it's a 4.8

StrokerAce03

iTrader: (7)

They never made a 4.8 aluminum block; they did make a 5.3 aluminum block though.

NateZQ8

iTrader: (3)

You could look for the VIN of the truck the engine came out of........other than that.......pull the heads.

Bo185

Pulling the heads wouldn't always work. I though some of the later iron 5.3's were flat top as well 06-up??? Pull the pan look at the crank to be sure if you don't have the VIN.

X2 no aluminum 4.8's

litreddevil

iTrader: (4)

most of the time their is a mark on what ever the motor is like a circle are a slash throught the number the block is.i really don't think anyone will be able to just pull a oil pan and look at the motor and say oh yea it is a 4.8 are yes it is a 5.3.

nighthawk08

if you pull the heads you could measure the stroke pretty easily. best way to tell.

2manycars

iTrader: (7)

+1

Mark Johnson

iTrader: (1)

How much oil can you fill the cylinder with? That'll tell ya the volume of the cylinder and which motor yer dealing with..............