| tgt4446 | -- 11-15-2016 @ 6:44 AM |
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I had our 1935 ford 21 bolt flat head engine rebuilt three years ago and now it has a valve sticking. Engine builder recommended using 20x50 oil which I did. Other than changing oil to a lighter weight what other options or suggestions can correct this problem
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| ken ct. | -- 11-15-2016 @ 6:59 AM |
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Add 4-6 oz. of Mystry Motor Oil to the crankcase and 4 oz to the gas tank and run the pis* out of it on the throughway it may free up. Or you can add a can of Rislone to the oil,that worked for me in an Olds long time ago. ken ct.
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| TomO | -- 11-15-2016 @ 7:06 AM |
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A lighter weight oil will not solve the valve sticking problem, but a high detergent will assist in keeping the valves free of varnish that causes the valves to stick. You should also use Stahbil in your gas all year around and I like to use Seafoam in the gas when I am not driving the car daily. MMO in the gas also helps. To free up the valve, you can try dribbling MMO down the carburetor, adding it to your oil and adding it to your gas. Seafoam has different detergents, so if the MMO doesn't work, you can try it. Tom
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| cliftford | -- 11-15-2016 @ 10:21 AM |
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I don't mean to question your expertise, but have you determined for sure that it is a valve?
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| tgt4446 | -- 11-16-2016 @ 6:24 AM |
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My hearing is very bad so I had a mechanic that owns his own business listen to it and that was his call. The fellow that rebuilt the engine has not listened to it yet but wondered if a spring has broke in the fuel pump. Since the engine was rebuilt I have never used additives in the fuel or oil. Do you have any other suggestions? I only use premium fuel with no ethanol in it.
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| 37 Coupe | -- 11-16-2016 @ 7:50 AM |
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The one way to diagnose and cure quickly is to pour some down the carb while engine is idleing. The noise or rough idle will go away and smooth out quickly. I had this issue one time after a rebuild and the Marvel Mystery Oil cured it quickly when applied this way.I always add to the fuel tank as required but I never add to oil in crankcase.
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| shogun1940 | -- 11-16-2016 @ 12:46 PM |
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If you take the spark plugs out and turn the engine over by hand you should be able to see one of the valves in each cylinder. If you squirt some pub blaster under the valve when it's open you maybe able to free it up. The valve you can not see is a guessing game. I would get strip of a mirror just to see when it's open and squirt it with pb and let it sit. Snapon does make a camera that will fit in the hole but they are expensive
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