vac block numbers

bob gooud

New User
I have a 1944 VAC with a busted block. The casting number is either VT148,VT149,VT748, or
VT149. Hard to read. We may have found one, but
the number on it is VT328. What does all these numbers mean and will the VT328 work on my tractor?
 
The block you have is an early one - I believe it is VT149. VT328 is a later one. There are some differences but whole motors can be swapped. The early motors have the oil pump built into the main cap while VT328 has the pump bolted to the main cap. Crank shafts are also different and I do not know if they swap.

Some people claim that the VT149 engines were made for Case by Continental or one of the other engine companies.

Jerry
 

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