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01-02-2020, 09:58 PM | #1 |
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8BA aluminum timing cover
Noticed tonight that the aluminum timing cover on our 4” stroke, 1CM cam, and 0BA distributor Flathead has two timing pointer locations. The pin is currently set in the 8RT location with a plug in the 0BA hole. What determines which hole the pointer is located in?
JB |
01-02-2020, 10:29 PM | #2 |
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Re: 8BA aluminum timing cover
Forgot to mention this engine is in a 52 F1 and running the stock truck pulley.
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01-02-2020, 10:54 PM | #3 |
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Re: 8BA aluminum timing cover
8RT is a truck engine, so I would think it’s set right.
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01-02-2020, 11:03 PM | #4 |
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Re: 8BA aluminum timing cover
Thank you
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01-03-2020, 12:04 AM | #5 |
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Re: 8BA aluminum timing cover
The crank pulley diameter is different between car and truck so that is why there is 2 different locations for the pointer.
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01-03-2020, 08:01 AM | #6 |
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Re: 8BA aluminum timing cover
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01-03-2020, 08:32 AM | #7 |
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Re: 8BA aluminum timing cover
The worst part of the alum cover is the ware pattern on the cam thrust surface, causing a large cam backlash. One way to check this is with the aluminum ball trick. Attach on to the nose of the cam and rotate the engine. .008'010" is normal. I have found as much as .020 . The only way to fix this is a shim behind the cam timing gear. . WHY?? The excessive baclklash has an effect on timing
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01-03-2020, 09:22 AM | #8 |
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Re: 8BA aluminum timing cover
The different locations are just to keep the indicator closest to what ever crank pulley is being used. Has nothing to do with timing.
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01-03-2020, 09:38 AM | #9 | |
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Re: 8BA aluminum timing cover
Quote:
It's a simple "lay-in" deal, simply sand the front edge to set the end play. Takes only a few minutes to get it right, the nylon sands quickly! Thanks, Gary in N.Y. P.S. Wishing all here a very "Happy New Year"
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01-03-2020, 09:41 AM | #10 | |
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Re: 8BA aluminum timing cover
Quote:
Then again have appropriate amount of material removed from cover mounting surface.
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01-03-2020, 09:58 AM | #11 | |
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Re: 8BA aluminum timing cover
Quote:
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01-03-2020, 10:09 AM | #12 |
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Re: 8BA aluminum timing cover
Really good thoughts and I appreciate the responses. Great, you gave me something else to worry about, cam end play....
JB |
01-03-2020, 11:36 AM | #13 |
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Re: 8BA aluminum timing cover
GOSFAST: That nylon cam button is a neat idea.
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01-03-2020, 03:59 PM | #14 |
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Re: 8BA aluminum timing cover
Thanks Gary, sure sounds like you've solved another pesky flathead problem
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