6.2 HMMWV serial number

[Gunfreak25]

I was hoping somebody could help me date my 6.2 HMMWV motor. From all the searching I did I didn't find much. All I know is it falls in the 82-91 category.

Block # 1402260
No julian code on the bellhousing flange. Just numbers "231".
Heads are 10137567

Lastly, the smooth section of casting on either side of the IP on the drivers side is marked "5HUM911". I believe this is the serial number.

 

[Tanner]

...and the reason for dating the motor is?

'Tanner'

 

[doghead]

I once dated a County Dairy Princess.

 

[Gunfreak25]

Inquiring minds would like to know, is all.