Aluminum Block or Cast Iron Block?

DustySLT · October 25, 2006

Is there a way of telling by looking at the motor if its iron or aluminum or is it in the vin or something?

ZZebes · October 25, 2006

You have a Cast Iron Block.

95Sierra2500 · October 25, 2006

To be a little more helpful, a cast iron block is usually painted black to keep it from rusting. An aluminum block typically isn't painted and will be greyish in color.

A simple test is to see if a magnet will stick to it or not. If it will, you've got an Iron block. Chances are you do though, since you have a 2000, unless this is not on your truck.

99Silver6.0 · October 25, 2006

Just look at it!! Is it black?? You have iron block though. The 5.3HO is what got the alum block.

MilkTruck · October 28, 2006

I have a 2007 6.0 (see tag) and it is an aluiminum block. Info seems to be scarce on this engine, can anyone point me in the right direction to some good tech info? or maybe fill me in? I'm a reformed Dodgeboy, and need all the help I can get

MS3DALE · October 28, 2006

I have a 2007 6.0 (see tag) and it is an aluiminum block. Info seems to be scarce on this engine, can anyone point me in the right direction to some good tech info? or maybe fill me in? I'm a reformed Dodgeboy, and need all the help I can get

MilkTruck,You sure you have the Gen IV "LY6" 6-liter? I didn't think GM was using any Gen IV engines in the "Classics".

At least all the '07 "Classic" HD trucks we're still getting in at the dealership have the Gen III "LQ4" Iron-Block 6-liter in them (Unless they ordered the optional 8.1 or DMAX) As a matter of fact all the '07 classic trucks were getting have Gen III engines in them.

And as far as I know the "LY6" 6-liter is a cast-iron block,not aluminum.The "L76" 6-liter is an aluminum block engine.

I can e-mail you a copy of your build sheet if you want,Just PM me your VIN and e-mail address.

Check out this website for more info on GM engines...GM Powertrain

MilkTruck · October 30, 2006

I have a 2007 6.0 (see tag) and it is an aluiminum block. Info seems to be scarce on this engine, can anyone point me in the right direction to some good tech info? or maybe fill me in? I'm a reformed Dodgeboy, and need all the help I can get

<{POST_SNAPBACK}>

MilkTruck,You sure you have the Gen IV "LY6" 6-liter? I didn't think GM was using any Gen IV engines in the "Classics".

At least all the '07 "Classic" HD trucks we're still getting in at the dealership have the Gen III "LQ4" Iron-Block 6-liter in them (Unless they ordered the optional 8.1 or DMAX) As a matter of fact all the '07 classic trucks were getting have Gen III engines in them.

And as far as I know the "LY6" 6-liter is a cast-iron block,not aluminum.The "L76" 6-liter is an aluminum block engine.

I can e-mail you a copy of your build sheet if you want,Just PM me your VIN and e-mail address.

Check out this website for more info on GM engines...GM Powertrain

<{POST_SNAPBACK}>

yup its an iron block. but it IS gen IV. Oddly enough though it has the GEN III engine cover. But I went to the site you posted, and compared the pictures, and it is most assuredly an LY6