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06-08-2016, 07:40 AM | #1 |
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Location: Northeast Penna
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Diamond engine ID ?
Hi Folks,
Back after lengthy hiatus. I have acquired a replacement engine for my '28 Special Coupe. It is a diamond block, bears date code, F 9 5, which suggests June 9, 1935? Also has this stamping above the #4 exhaust port: 8 <->5 The number pad above the water inlet is stamped: R C 55086 (star) Does anyone know if the stamped numbers offer any clues to its previous application ? I purchased the engine from a local club member, who obtained the long block from Bill Haberer out near Williamsport, PA. That's as much as we know about its history. Thanks for your help! Frank |
06-08-2016, 09:02 AM | #2 |
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Re: Diamond engine ID ?
In England the "R" denotes a Ford factory rebuilt engine ,this was done on an exchange basis by Ford dealers . The "C" is most likely a date code . Check the bores, in England Ford sleeved exchange engines back to standard . Sometimes insert valve seats were also installed .I guess Ford in USA did the same thing .
John in lovely day Suffolk County England |
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06-08-2016, 12:17 PM | #3 |
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Re: Diamond engine ID ?
S/C Frank..........................WELCOME BACK, I wondered what had happened to you.
Paul in CT |
06-08-2016, 12:25 PM | #4 |
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Re: Diamond engine ID ?
My understanding is that the Engine number was sometimes stamped with the same number it was replacing. Researching this number may tell you what it was put in. I have a diamond B motor that was stamped as an AA and was pulled out of a truck.
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06-08-2016, 12:42 PM | #5 |
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Re: Diamond engine ID ?
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06-08-2016, 12:59 PM | #6 |
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Re: Diamond engine ID ?
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These were brand new blocks, standard bore, hard seats in the exhaust, a new "B" grind camshaft, a good low ground "A" crankshaft; these were sold outright by Ford, no exchange. There is a small "Diamond" cast in the block just above the side timing cover. Ron Rude |
06-08-2016, 01:48 PM | #7 |
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Re: Diamond engine ID ?
Thanks Ron !
Got the raised diamond above the side timing cover. Any way to tell a B cam by visual inspection (any markings?) I'm not familiar with "low ground A crank" - what does this mean ? Thanks, Frank |
06-08-2016, 02:13 PM | #8 |
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Re: Diamond engine ID ?
Look for a fuel pump lobe on a B cam - not there on the A
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06-08-2016, 02:16 PM | #9 |
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Re: Diamond engine ID ?
Frank,
The camshaft has a lobe toward the front which drove the fuel pump on the "B" "C" engines ( the camshaft is also copper plated between the lobes). Ford may have had some new A crankshaft to use or surface a "A" crankshaft journals a few thousands to clean up ? Ron |
06-08-2016, 03:06 PM | #10 |
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Re: Diamond engine ID ?
Thanks Ron & Juggler. Extra lobe for fuel pump should be easy enough to spot.
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06-08-2016, 03:10 PM | #11 |
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Re: Diamond engine ID ?
Frank,
Some additional information about the "B" cam; due to the whip of the camshaft the most wear is on the center journal so check this journal as it also drives the distributor and oil pump; journal #1 and #3 are quite often standard. The nice thing about a "B" cam is the lobe shape, it gives a higher lift and a faster opening and closing of the valves. When rebuilding the engine I suggest you go to stainless valves and modern keepers and adjustable lifters. I set my intakes at .014 clearance and exhaust at .018, have never had a burnt valve and they are quiet. Ron Rude |
06-09-2016, 06:25 AM | #12 |
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Re: Diamond engine ID ?
The post from Jim 1932 was very interesting just curious to know what AA serial was stamped on his B block . Ford in England built AA trucks into 1936 . From 1932 these Dagenham trucks were fitted with B blocks serialled AA . I have a block out of a 1935 truck serialled AA 4981139 . USA servicemen could bring a vehicle home free after their stint in UK . Many brought in MGs and Jags etc but some brought in As and Ts . Could be that motor started life in England .
John in sunny Suffolk County England |
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