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 1999 block with mechanical cams and mechanical heads.  Is their any reason this set up would not work? Sean(my friend) says it is hard to bar over. I suggested he loosen valves up to 40 and try again and let me know. I am asking you guys for guidance also. The block was in a 1991 prevost and is going into a 1990 prevost. with same transmission and accesories. The block # say it is a 1999. the heads and cams are from the 1990 engine which for some reason is mechanical. (my 89 is ddec). Just trying to help a friend out of a bind here and don't really understand problem.  Bob

Every thing will work Bob only difference maybe the oil pan the later DDEC's used a different gasket and bolt pattern (better) and the back may have sensors locations fwiw you could always get the 8v92 in mechanical or DDEC up till 2000 

The Eagle I sold Matt has a 1999 mechanical 8v92


good luck

Will relay facts. Was hoping it was that way. never know!  Will look for reason for tight engine.  Could be as simple as all new parts coming together. I am assuming he is baring over the correct direction. Also assuming he has accesories with proper lash settings.  Anything else?   Bob

The 6V-53TA, 8V-71TA, 8V-92TA are still being made for military vehicles.  Good Luck, TomC

I didn't really measure, but I have the recollection that my new engine took over 200 ft lbs on the torque wrench to bar over.  Good compression takes a fair bit to overcome.  I'd be really interested to know what the number to look for is, in terms of normal torque to bar over a fresh engine vs a worn out one.  slacking off the valve lash should leave them closed longer, increase dynamic compression and make it harder to bar over, I would expect.

Brian

Use a 1- 1/2 inch socket with a ratchet on the cam should turn fairly easy till the compression stroke let it set and leak off turn some more takes more to turn one on the crankshaft end

good luck