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04-26-2019, 04:47 PM | #1 |
Senior Member
Join Date: May 2015
Location: Frelighsburg, QC
Posts: 166
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Front Cam Bearing Orientation
Hi all. Embarking on my first flathead rebuild ('39 Merc 239 c.i.) and need to know whether the large hole goes up or down on the front cam bearing. I'm aware that it must go up on the rear bearing. I found instructions in a Lincoln Mercury Overhaul Manual (for the 3rd gen engines) that said "Install the front cam bearing so that the larger of the two holes will be at the bottom.."
Thanks in advance for any advice on this. |
04-26-2019, 04:58 PM | #2 |
Senior Member
Join Date: Dec 2010
Location: East Coast in CT
Posts: 1,529
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Re: Front Cam Bearing Orientation
Its a matter of ones preference. The bearing will work fine in both directions. I personally prefer the large hole on top just like the rear bearings orientation. Having the smaller hole located in the bottom allows more bearing surface to support the cam shaft. Not a big deal but in my eyes at least more is better for support of the cam and the added pressure being applied by the valve train pushing the cam downward somewhat.
Ronnieroadster
__________________
I use the F word a lot no not that word these words Flathead , Focus and Finish. "Life Member of the Bonneville 200 MPH Club using a Ford Flathead block" Owner , Builder, Driver of the First Ford Flathead bodied roadster to run 200 MPH Record July 13, 2018 LTA timing association 200.921 in one and a half miles burning gasoline. First ever gas burning Ford flathead powered roadster to run 200 MPH at Bonneville Salt Flats setting the record August 7th 2021 at 205.744 MPH |
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04-26-2019, 05:42 PM | #3 |
Senior Member
Join Date: May 2015
Location: Frelighsburg, QC
Posts: 166
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Re: Front Cam Bearing Orientation
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