Decoding Engine Rebuilders Tag

D

Dee Jay

Member
I just pulled a 59A out of a 1945 1 1/2 T Truck. The engine has a tag abt. 2" by 3" attached to the bellhousing with brass rivets. At the very top is the Ford oval. Below that Bore OS and a stamped E. Below that 99 obviously hand stamped. Then 6211 K. Below that 6331 N. Below that 6333 N. The numbers are printed as part of the tag while the letters are stamped in. Below this 7891 again appears hand stamped and at the bottom it says rebuilt by authorized Ford engine rebuilder. It appears the bore is .060,the rods .010 and the mains .030. Is this correct and what do the 99 and 7891 designate? Thanks
 
i am going to make a guess--- the 7981 I am thinking could refer to a "job#" ---a way for the rebuilder to look up the records of who worked on it, and what parts were used if there was a problem.

99 could have several references, it could mean that it is a type "99" engine, it could mean that it has 99a rods, I have a "engine parts reconditioning" book ford published in 1943, and the 99 reference is used for rods, crankshafts, whole engines, and sleeves, it also has a reference to putting a number on the plate to look up the "rebuild sheet" if there was a problem.
 
And a true 99 block would be '39-40, though all 239 vehicles acrried the 99 in their serial numbers. Does the block have the actual "59" cast in the bellhousing?
 
I have a rebuilt in my 41 Fordor with a similar tag on the block. The 6211, 6331, and 6333, are part numbers for the bearings on the crank with 6211 being conecting rod bearings, 6331 the rear main bearing and 6333 the centre and front main bearings. in my engine the bearing numbers a preceded by 81A which is the beginning of the number stamped on the heads. Nothing similar to the 7891 on your tag.
 
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