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Your post is a little confusing. The LD/LDT/LDS465-1 had two-hole while the LDS465-1A and LDS465-2 both had one-hole injectors (per TM9-2910-226-34 dated 1974). Seems a little odd that this TM doesn't require that the one-hole injectors should be replaced with the two-hole. Is the LDS...

D4800: Naturally aspirated, 1120°F EGT at full load D4800T: Turbocharged, 1165°F EGT at full load, up to 100kW output @ 1800rpm (134 horsepower) D4800TA; Turbocharged and aftercooled, 1200°F EGT at full load, up to 137.5kW output @ 1800rpm (184.4 horsepower) D5000: Turbocharged, 155 PTO...

The R6602 came first; not the multifuel. Both had two heads. The multi has an obvious lineage with the preceding gas and diesel engines but it was clearly a new and more robust design.

How does this prove that the casting mark belongs to MAN? Is there something in the picture that I have missed?

Here is some interesting info on the valve timing: LDS427-2 (from TM9-2815-204-35, dated 1964) Intake opens at 6° BTDC Intake closes 30° ABDC Intake remains open 216° Exhaust opens 36° BBDC Exhaust closes 2° ATDC Exhaust remains open 218° White D5000 (White 2-155 tractor engine service manual...

Hi Rusty, Continental only licensed the "M" combustion chamber; the balance of the engine is all Continental design. If you compare it to Continental's other engines such as the R6602, you will see that it shares MANY features. I have one of the new heads on the shelf and the shield emblem...

Well, none of this is especially encouraging. I have two White multifuels built in the early 80s.

It would seem that they do exist: http://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=oliver&th=174105

I have read about quite a few broken rods; can't remember many broken cranks?

There are portable tools which can identify different alloys. One could remove the balancer to obtain access to the crankshaft if really curious. I haven't been able to find anything on a 1548 alloy; wondering if the numbers are transposed. Taylor's book only recommends 4140 or 4340 for...

I interpreted the tractor post that there was a visible difference. There is a guy about a hour from where I grew up who parted out maybe a hundred deuces and disassembled many multifuels. I was discussing the crank issue with an old friend today. One time when visiting this dismantler, my...

There are two different td blocks.

This is interesting and suggests that the military crank was much heavier than the tractor. Maybe the weaker crank was the one from the tractor and ended up being used in the military apps to save $...

White would have been making engines for both the military and their tractors (apparently from 1976 to 1988 http://www.tractordata.com/farm-tractors/000/5/7/570-white-2-155.html )

Was that Hercules only or White as well?

I suspect that the most important mod and most relevant for a low rpm, low horsepower engine are the 12 pt rod bolts.

Anything new?

See, I really believe that most folks have more horsepower than they think. :-D

Figure 41 on page 34 of the LDS-465-1 Troubleshooting Manual states 18-20" Hg manifold pressure at full load and 2400 rpm with diesel. 20" Hg equates to 9.823 psi. Where do you get your numbers from?

I couldn't agree more. If you have 10psi of boost, you have "LDS power". That simple.