a few things come to mind...
The crank was cross drilled during a rebuild. Was it possibly done during
your last rebuild? My 948 race crank has cross-drilled journals.
the number plate is from a different engine (unlikely)
You can tell early blocks from later ones by the thickness of the flange at
the lip where the oil pan bolts on. There is no mistaking the two. The
other possibility of course is that you got an earlier crank in a later
block.
If you had the pan off, you could see if you can read any of the casting
numbers, but I know you just got that thing back together.
I'm not an expert on these cranks, but all I've heard is that the
cross-drilling is unique to the EN40B. Turns out I have a 1275 that meets
all the criteria, that's why I was trying to find out more myself.
Gerard
At 9:32 AM -0700 8/9/00, Bryan Vandiver wrote:
>Gerard,
>
>I'm somewhat confused, since early postings seemed to indicate that only the
>EN40B crank was cross drilled??
>I don't know if it was the 'orginal' crank that was 'shipped in the
>engine. The
>1275 I had was in my tub, when I bought my car, so I have no history on my
>engine. The crank I have was indeed cross drilled at 45degree angles between
>each journal, and according to the number plate on the block, and using VB
>reference in the front of their catalogs, it does appear to be made in '71.
>
> - Bryan
>
>>X-Sender: pxlsmith@shell18.ba.best.com
>>Mime-Version: 1.0
>>To: Andrew.Griffith@ReadRite.com, Bryan.Vandiver@eng.sun.com
>>Subject: RE: Crank & axle ID help
>>Cc: spridgets@autox.team.net
>>
>>Bryan,
>>
>>EN40B cranks were only in early 1275s ('67) and not for the entire years
>>run. I was asking around on this one last week and here's what I culled
>>from the responses.
>>
>>* 12CC serial number prefix
>>* cross drilled rod journals
>>* metal may appear rose colored
>>* casting number is illegible beyond the beginning and ending numbers/letters
>>
>>>From OSM, "Very early engines from 12CC-DAH-1386 to 1397 and 1842 onwards,
>>used a steel EN40B nitrided crank, but this was replaced at some
>>unspecified point by a Tuftrided EN16T crank." Pg. 99.
>>
>>Gerard
>>
>>At 4:05 PM -0700 8/8/00, Andrew.Griffith@ReadRite.com wrote:
>>>Bryan,
>>>Was that you (rdbh@aol.com) who out bid me, while I was stuck in traffic,
>>>for that set of "EN17 EOBTA 806" Axels on Ebay yesterday?
>>>At any rate... the seller said they were out of a 77 midget.
>>>
>>>And as long as we're on the subject of axels... I remember hearing that
>>>there was an early run of spridget axels that were no good or there was a
>>>cutoff year when they started using a better grade of steel. Does anyone
>>>know which axels are the ones NOT to use?
>>>Thanks,
>>>
>>>-Drew in San Jose
>>>
>>>-----Original Message-----
>>>From: Bryan Vandiver [mailto:Bryan.Vandiver@Eng.Sun.COM]
>>>Sent: Tuesday, August 08, 2000 3:32 PM
>>>To: nosimport@mailbag.com; spritenut@Exit109.com
>>>Cc: spridgets@autox.team.net; team-thicko@autox.team.net
>>>Subject: Re: Crank & axle ID help
>>>
>>>
>>>For future reference....
>>>What years did the produce the EN40B crank??
>>>The one in my 1275 was cross drilled. I believe my 1275 came out of a '71
>>>midget
>>>according to the engine serial number.
>>>Also for what years did they use the en17 BTA axels?
>>>I think I got my set out of a '78 midget.
>>>
>>>regards - Bryan
>>>
>>>>X-Accept-Language: en
>>>>MIME-Version: 1.0
>>>>To: "Peter C." <nosimport@mailbag.com>
>>>>CC: spridgets@autox.team.net, team-thicko@autox.team.net
>>>>Subject: Re: Crank & axle ID help
>>>>
>>>>"Peter C." wrote:
>>>>>
>>>>> Oh most knowledgeable ones,
>>>>> An "acquaintance" with literally stacks of 948 cranks and axles
>>>is
>>>asking
>>>>> what are the casting/forging numbers on the most desirable crankshafts
>>>and
>>>>> axle shafts. These must be the numbers found on the pieces themselves.
>>>>> Please, check your cranks.
>>>>> Thanks Peter C
>>>>
>>>>For the axles, EN17 BTA is the harder ones.
>>>>For cranks, I don't think there any choices on 948s but I could be
>>>>wrong.
>>>>EN40B is the hardened 1275 crank it has cross drilled oil holes for easy
>>>>identification.
>>>>--
>>>>Frank Clarici
>>>>Toms River, NJ
>>>>The bug in the rice bowl
>>>>http://www.exit109.com/~spritenut
>>
>>
>>--
>>Please visit Four Points Travel -
>>Discount Online Hotel Reservations in the U.S.
>>http://www.gerardsgarage.com/fourpoints
>>
>>
>>G G Gerard Chateauvieux
>> E A
>> R R pixelsmith@gerardsgarage.com
>> A A
>> R G Pixelsmith on Duty
>> D E
>> S http://www.gerardsgarage.com
>>
>>
>>
>>
>>
--
Please visit Four Points Travel -
Discount Online Hotel Reservations in the U.S.
http://www.gerardsgarage.com/fourpoints
G G Gerard Chateauvieux
E A
R R pixelsmith@gerardsgarage.com
A A
R G Pixelsmith on Duty
D E
S http://www.gerardsgarage.com
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