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Maybe for a SBC but not a universal truth. Look at engines with relatively narrow rod bearings; they need more pressure. It is also misleading to state this suggesting that a multi with worn bearings but still 25 psi at speed is perfectly acceptable.

I think that you are confusing two failure modes. Yes, you need to maintain the oil at the bearing and the lack of this oil will result in wiped bearigns (something not reported by those who have blown up engines). However, once you exceed the fatique strength of the fasteners, no amount of...

Apples and oranges comparison. One uses a bolt pressed into the rod with a nut on the cap and the other is just a bolt on the cap.

There have been two types of rod bolts used in the multis: 6 point and 12 point. It appears that the 12 point is in later build engines. It also appears that the failures have been predominately (or even confined to) the 6 point bolts. You can determine which bolt you have by looking through...

When rods have failed, it has been catastrophic with no apparent damage to the crank other than contact directly after breakage. If there were insufficient oiling, I would have expected there to be damage all the way around the crank. Bearings need to have enough surface area (width and...

Reliability reasons aside, the efficiency of the multi drops off significantly at high rpms.

Won't keep an overstressed rod bolt from failing at extended high speed operation.

Just to be clear, the multifuel was derived from the TD6427 industrial/ transportation engine NOT a farm tractor engine. The white/ oliver tractors were a later adaption of the multifuel (with lower compression ratio, Roosamaster pump, etc). The multifuel was a SIGNIFICANT redesign of the...

Any update?

I found these interesting statement on a tractor website: One other differenc is that the connecting rods are lighter in the truck motors. As J said, some of these ld engines had better crankshafts but not all of them. I have five of these motors and only one has the better crankshaft. I...

Will this affect fueling rate?

This is not entirely true. The internal combustion engine "bible" by Taylor indicates that high compression ratio alone is sufficient to enable multifuel capability. The MAN combustion is probably just icing on the cake.

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