3394 case IH Engine swap

heartlazyt

New User
I have a 3394 engine with a spun rod bearing. I can get a 2594 engine for it, they are both A504DBT engine but the 3394 is MFD and the 2594 is 2 wheel drive. Is this block going to bolt up? It looks like the 3394 block has extra holes on the front but only have picture of the 2594 engine.
Thanks
 
the 540 block has four at the front and I don't think the MFD makes any diff but I have been wrong before, I know the 2090-2290 MFD's are the same block as I have changed them out before cnt
 
So all 504"s have four holes one each side in the front? As I only see two I wonder if two are plugged or maybe he has the wrong block. Did they plug them on the 2594"s? or any two wheel drive tractors?
Thanks
Pat
 
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Probably a little late but that is different from most 504s. Most only have the 2 upper holes on each side(4 total)
 

I drilled the extra holes on this block and tapped the the two bottoms ones that needed it they were a 5/8 inch NC and had studs in them. The back is also different, They are 5/8 inch nc on the top three and the next one on each side is a 5/8 inch clearance so those had to drilled and the top three tapped too. But it is done now and working fine so far....
Thanks
Pat
 

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