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Old 10-13-2004, 09:09 PM
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Question Wanna learn about flatheads....

I do not own a flathead now, but would like to someday. For now, I'll have to take gratification in just "knowing" about them...So, enlighten me. What is different other than the valve housing is part of the block? Speaking...how do you get to the valves? Use a 239 for example, as they're the most common and probably what I would own. How does the valve train work specifically? Is the bottom end the same as an OHV motor(crank, rods, pistons, etc)? Do they have onboard mechanical fuel pumps like later engines? What drives the oil pump? Anything you know, spill it unto me!

Thanks guys!
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Old 10-13-2004, 11:12 PM
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http://www.fordbarn.com/earlyv8/forum03/
http://groups.msn.com/FordFlathead19...3/messageboard
On the MSN Site follow the links on the left side for additional info
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Old 10-14-2004, 12:07 AM
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Spend some time on this site too. Pictures are worth a thousand words.........

http://www.vanpeltsales.com/FH_web/flathead_home.htm

Basically they're the same as ohv engines, except the valve train which has no pushrods or rocker arms - the valve stem/lifter/cam are in direct contact. Gear on the rear of the cam runs the oil pump.
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Old 10-14-2004, 05:23 PM
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How does the exhaust go about getting to the side of the engine? Especially with the valve being on the inside...I'm just not seeing it....
Scott
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Old 10-14-2004, 06:31 PM
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You almost have to see one to figure it out, and then you'll go.......duh!

The exhaust drops below the valve through a passage in the waterjacket and out the exhaust manifold. The two middle ones use the same port which confuses a lot of people when they see 8 spark plugs and only 6 exhaust tubes.

Routing the exhaust thru the water jacket is one of the reasons flatheads are prone to overheating IF the engine and radiators aren't clean and timing isn't kept on the mark.
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Old 10-14-2004, 09:08 PM
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Go to www.store.yahoo.com/motorbooks/index and click on engine manuals. They have a really great book on the Flathead Ford engines! It is lavishly illustrated, including flow diagrams of the incoming fuel/air mixture and the exhaust gases as well!
It is really a great book, Scottie!
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Old 10-24-2004, 05:05 PM
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Swing by your local Barne's and Noble.
Tex Smith's Complete Ford Flathead V8 Engine Manual is excellent,under $20, it covers the evolution of the flatty and modifications for hot rodders. Very good detail drawings of how they work too. Basically everything you would need to know.

It makes a good coffee table book.
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