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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » Crane Roller Rocker Question

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    10/27/2018 7:39 PM  #1

    Michael H.
    I FYI 24-7

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    From: Laurel, MS
    Registered: 4/01/2013
    Posts: 869

    Crane Roller Rocker Question

    I was installing the Crane Roller Rockers on my 351W and I noticed that each rocker has either a 4 or a 6 cast into it... Can anyone tell me if they have any significance? (i.e. do all the 4's go on the intake valves and all the 6's go on the exhaust valves...or vice versa)

     

    10/27/2018 10:54 PM  #2

    lowercasesteve
    Senior 24-7 FYI Addict

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    From: Auburn, Ca
    Registered: 4/01/2013
    Posts: 1,219

    Re: Crane Roller Rocker Question

    Are the Ford style part numbers on the rockers Different?  The one on the left starts with "F8ZE".  While the one on the right is "FTZE".

    Original owner - 351w,T-5, 4whl disks, power R&P
     

    10/28/2018 12:59 PM  #3

    Michael H.
    I FYI 24-7

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    From: Laurel, MS
    Registered: 4/01/2013
    Posts: 869

    Re: Crane Roller Rocker Question

    I can see how it looks that way in the first picture.  Here's another one that shows the part numbers more clearly.  They are both part number F3ZE-6529-AB which really makes it even more puzzling about the 4 and the 6.

       •Thread Starter
     

    10/28/2018 3:14 PM  #4

    Michael H.
    I FYI 24-7

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    From: Laurel, MS
    Registered: 4/01/2013
    Posts: 869

    Re: Crane Roller Rocker Question

    Ok, I just gave this a second look.  I have 5 cylinders that have a 4 and a 6 on them, and 3 cylinders that have two 4's on them... So that means that I don't have enough 6's to put a 4 and 6 on each cylinder.  That fact combined with the fact that they have the same part number on them makes me think that the 4 and the 6 are interchangeable when it comes to installation.

    Maybe the 4 and the 6 are just what mold they were cast out of for quality control purposes??? just a guess

    Last edited by Michael H. (10/28/2018 3:15 PM)

       •Thread Starter
     

    10/29/2018 6:59 AM  #5

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,103

    Re: Crane Roller Rocker Question

    I'm sure its an internal control number for Crane, or something like that.  No bearing on function.

     

    10/29/2018 7:53 AM  #6

    Rudi
    Senior 24-7 FYI Addict

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    From: Stuck in the 50's Welland Ca
    Registered: 4/01/2013
    Posts: 3,790

    Re: Crane Roller Rocker Question

    Michael H. wrote:

    Ok, I just gave this a second look.  I have 5 cylinders that have a 4 and a 6 on them, and 3 cylinders that have two 4's on them... So that means that I don't have enough 6's to put a 4 and 6 on each cylinder.  That fact combined with the fact that they have the same part number on them makes me think that the 4 and the 6 are interchangeable when it comes to installation.

    Maybe the 4 and the 6 are just what mold they were cast out of for quality control purposes??? just a guess

    Whenever I made forging or casting dies with identical multiple cavities each was numbered for quality control.
     If there was an issue the cavity number could be identified.
     I'm guessing you are correct in that statement

    Good work ain't cheap, Cheap work ain't good!   Simple Man
     

     

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