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Timing Diff 225 with 350/231 Timing Cover

Discussion in 'Early CJ5 and CJ6 Tech' started by Warloch, Mar 18, 2006.

  1. Mar 18, 2006
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
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    So I have been trying to figure out why the 225 just didn't seem to have the power I expected - then it hit me.

    The timing cover on the engine is off of a Buick 350/231 not a 225. I have one of each sitting on stands lookin at me the whole time. Doing some measuring it looks like the 0* mark is 7/8" different or what looks like 15* retarded? - Higher on the crank with the 350/231 timing cover.

    Anybody else know about this and confirm that I am not 'thinking wrong' again?
     
    Warloch, Mar 18, 2006
    #1
  2. Mar 20, 2006
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
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    So, no one else has done this?
     
    Warloch, Mar 20, 2006
    #2
  3. Mar 20, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    I thought someone else here had used a 231 cover on a 225. A 350 should be the same I'd think, the crank wasn't split yet. If it was for an EF 231 is that the difference?
     
    sparky, Mar 20, 2006
    #3
  4. Mar 20, 2006
    michigan_pinstripes

    michigan_pinstripes I'm not lost, I'm wandering

    Clarkston MI...
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    Although OF and EF cylinder intake/exhaust "events" are timed differently, 360* is 360* on #1 TDC I would think.

    Even:
    60-60-60-60-60-60
    1 6 5 4 3 2
    vs
    Odd:
    90-150-90-150-90-150
    1 6 5 4 3 2


    Interesting to ponder this. I keep thinking in my mind how my L-head timing is off by 15* due to the oil pump being off a tooth or so. We found this out by accident when we tuned it by vaccum.


    Bui-ha's can't be off.... can they?
     
    michigan_pinstripes, Mar 20, 2006
    #4
  5. Mar 20, 2006
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Finding TDC on the compression stroke will confirm whether you're right ot not. Makes sense though if the timing's retarded on your power issue.
     
    Glenn, Mar 20, 2006
    #5
  6. Mar 20, 2006
    willys59cj5

    willys59cj5 Sponsor

    Gilroy, CA
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    Jun 1, 2005
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    660
    I was told by a friend you can do a rough estimate of TDC using a dowel and putting it through the spark plug hole. Make sure you don't have too much slack in the timing chain. Then mark your 0 at TDC on the cover. After that you can place timing marks on the harmonic balancer inorder to determine amount of advance.
     
    willys59cj5, Mar 20, 2006
    #6
  7. Mar 20, 2006
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
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    Thanks - Ya Sparky, it's the same as the 231's I have. Going to work on finding TDC, but the weather moved in and it's -8 with wind chill. My guess puts the 0* behind the bolt that mount the timing marks on the cover.

    Michigan - it is 360* but the point in rotation where that starts and ends is what I am trying to figure out.

    I'll get some pics and post them, if for nothing other than a sanity check (mine is always in question).
     
    Warloch, Mar 20, 2006
    #7
  8. Mar 20, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Or just pull the valve cover off and watch for the intake valve to close. That's what I did.
     
    sparky, Mar 20, 2006
    #8
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