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
--
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