6.2/6.5 Cylinder Block Date Code

[DieselDobro]

I bought a Michigan K3500 Dually truck ($1200) in Nov/ 2011 that was Michigan rusted and rusted some more......BUT ...found out through digging into previous owners service records that the engine was replaced in 9/2003 at the Chevy dealer.

They spent 8k on just the engine. The truck has had 34k miles put on it since. Thinking AM/ GEP engine here.
I can't wait to see the date code when that badboy gets yanked out. I'm planning on dropping into a '01 3500HD dump truck.

Mark
'96 K2500, stock (so far) 98k miles
'01 3500HD 15k GVWR
'96 K3500 SRW
'97 K3500 DRW

[Robyn]

The AMG date code is XX-XX-Letter (H,J,K,L and so on)

(Example) 06-10-J)

H is the first year that AMG was in full control IIRC its 2000
I was not used as it looks like a 1
J is the next letter and so on
The letter indicates the year.

A GM installed engine in 2003 might well be an AMG built engine, BUTTTTTTTTTTT it might be an old stock GM engine too.

The date code layout will certainly show the story.

[Gunfreak25]

My 6.2 surplus engine has the common 14022660 casting. I know this falls under the "82-91" category but the engine also came with a permanently glued rebuild plate in the intake valley.

It is a Military rebuild tag from 2004 but it gives the engines serial number as "5HUM911" I am assuming HUM means HMMWV

On the left of the bellhousing flange there are no numbers or markings. However on the right there is a 3 or 4 digit code. I can post it tomorrow.

There has got to be documentation out there listing specific years for the common 660 blocks.