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EFV-8 Club Forum / General Ford Discussion / 8BA engine

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Discussion Topic: 8BA engine -- page: 1 2

oldfords

09-11-2023 @ 9:01 AM

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Thanks, I will for sure check on the gaskets. Cutting the combustion chambers on both heads can't be cheap either.

DanD32

09-10-2023 @ 5:10 AM

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Cometic makes head gaskets in different thicknesses for valve clearence problems they are not cheap but might fix your problem without machining anything

TomO

09-08-2023 @ 4:33 PM

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I have been told that the material in the head combustion chamber is thin and every .001" is needed, by a machinist that specialized in flathead Fords.

Tom

wmsteed

09-08-2023 @ 8:49 AM

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Many years ago, (1955) a thermostat on the right bank stuck closed on a trip from Los Angeles back to my home in Vegas. The engine got really hot which warped the head, resulting in a blown head gasket.
At the time there were a lot of service stations along the rural highways because car problems were an every day event.
I limped into a service station up on top of the Baker Grade, took the right head off, bought two head gaskets and a can of Permatex, Lathered the gaskets, head and block with Permatex and reassembled everything. I put water in the engine, it sounded OK so were headed for Vegas.
I had to drive the 36 to work for over a week before I could pull the heads and have them surfaced. I drove the 36 for two more years before I had the engine rebuilt.

Bill
36 5 win delx cpe

oldfords

09-06-2023 @ 6:31 AM

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I used a dial indicator and found my valves are lifting .385". I took digital calipers and a micrometer, and as near as I can tell I have .319" to .350" valve clearance in the head. When I consider a gasket compressed to .050", I would need at least .030 more clearance in the head. .319" clearance plus .050" gasket = .369" space available, and .385 required. Can I safely take that much out of the valve port on the head. I have also found a company the makes thicker gaskets.

oldfords

09-05-2023 @ 6:37 AM

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Has anyone ever put two head gaskets on to solve this problem? Just a thought

pauls39coupe

09-04-2023 @ 6:55 PM

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I have seen this happen before and I suspect it has something to do with the valve angle on the drivers side, and overly milled heads. You should check # 8 for bent valves too.
Most likely the heads have been milled somewhere along the line cutting the clearance. The 400jr has a lot of lift so things get close under the best of circumstances.
If you can find a pair of un-cut 8BA or 8CM head they may work. Put some strips of modeling clay on the valves and pistons, then turn the engine over by hand. Remove the heads and see how much clearance you have. Do this on both sides as you may be near disaster on the passenger side also.

This message was edited by pauls39coupe on 9-4-23 @ 6:56 PM

Catfish Jones

09-04-2023 @ 3:00 PM

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I realize it may be too late to help with this discussion but the endoscope in the attached picture is a wonderful tool for looking into a cylinder head for bent/stuck valves, rust or scorching on cylinders. Very handy for retrieving lost items with the included hook and magnet attachment. It takes pictures and video. For less that $50 on Amazon it’s a great tool.

oldfords

09-04-2023 @ 2:27 PM

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Thanks for the info. I think I would like to try machining the heads first. How would I determine how much to cut out and would it be the complete circle of the valve?

al

37RAGTOPMAN

09-04-2023 @ 2:06 PM

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BE SURE to check the valve lifters for damage, if they bent the valves, they might have damage,
check even the cam lobes for marks ,
hope this helps, 1937Ragtopman,Maine,

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