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06-03-2022, 09:16 AM | #1 |
Member
Join Date: Dec 2019
Location: Belgium, West Europ
Posts: 88
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Flathead worn valve guide ?
Hi flathead gurus.
I think some valves have to much play in their guide. Is there a way to measure this play ? This is a French flat, guides are one piece style and plain. There is no groove to put the seal in it. Can the french guide be replaced by a 8ba part ? I was told french valve are shorter than 8ba, and the lifter is longer. But what about stem diameter ? Thanks for your help. For example : |
06-03-2022, 01:48 PM | #2 |
Senior Member
Join Date: Dec 2010
Location: East Coast in CT
Posts: 1,556
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Re: Flathead worn valve guide ?
On my NOS French block I installed all new Ford 8BA valve train parts. The answer to your question about the valve guide is yes the 8BA guide is a perfect replacement for the French block.
Ronnieroadster
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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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06-03-2022, 02:55 PM | #3 |
Senior Member
Join Date: Dec 2010
Location: East Coast in CT
Posts: 1,556
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Re: Flathead worn valve guide ?
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We know the connecting rods were different lengths to make up the difference if the crank was the 3-3/4 stroke or the 4 inch stroke. That was done so only one style of piston was needed the standard 3-3/4 pin location. The connecting rod for the 4 inch stroke crank was shorter. The connecting rod for the 3-3/4 stroke crank was the stock Ford 7 inch center line length. 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 Last edited by Ronnieroadster; 06-03-2022 at 03:05 PM. |
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