I just doublechecked and according to the Haynes manual you dont need to remove the heads, just the rockers, pushrods, etc. To be honest ive never done this before on a 6.2, but I figured that there is a valley pan because you have the intake with the injector pump below it so I figured there is a valley pan to seal the lifter area. Now, I assume that if you take of the manifold and the injector pump and then whatever covers the lifter area after having taken the rockers and pushrods out you should be able to take the lifters out just like a gas motor. Im hoping some of the guys who have done this i.e. dieseldan could elaborate on this a bit more. Sorry if I have given any misinformation, Ill try not to let it happen again.
82 K5, 6.2L Diesel, sm465, np205, 14 bolt welded, 8 lug 10 bolt lock right, 410 gears, 35" Mud Kings
SPEAK SOFTLY AND DRIVE A BIG TRUCK