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| Ford 9N, 2N & 8N Discussion Forum |
Engine tapping on startup
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Fletch in VA
05-12-2013 08:50:25
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When the engine is first started there is a tapping noise in the front spark plug area.
After running it decreases considerably. what is it?
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Ken in Mi
05-14-2013 09:23:29
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Re: Engine tapping on startup in reply to Fletch in VA, 05-12-2013 08:50:25
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Could also be a manifold leak.
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Charner
05-12-2013 17:37:33
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Re: Engine tapping on startup in reply to Fletch in VA, 05-12-2013 08:50:25
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Try other test that are recommended. Then, you could have sleeve no. one slipping when cranked and engine cold. when heats up it snugs up a little and less noise. You can check this by removing spark plug in no. one and crank. Does the sound get louder. If so, coulb be you problem. You can pull you head and do on sight examination for the cost of a head gasket and about an hour. Check valves while in there. Good luck.
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DScott
05-15-2013 08:03:16
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Re: Engine tapping on startup in reply to Charner, 05-12-2013 17:37:33
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Quoting Removed, click Modern View to see
Yep, I had that issue on my 49 8N that probably didn't have 20 hours on a overhaul when I first heard it. The tractor ran great, had good oil pressure and the valves were properly adjusted (I suspected the valves at first). But it had a light knock or pecking that would get better and then wors. Also, the sound seemed to change as the engine warmed up but it never went away. I pulled the head, turned the engine over and the #3 sleeve popped up. Cleaned up the cylinder and sleeve, applied sleeve retainer and that solved the problem.
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NOXJohn
05-12-2013 10:58:40
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Re: Engine tapping on startup in reply to Fletch in VA, 05-12-2013 08:50:25
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Go out on a dark night and start the tractor up. Look at the spark plug wires and see if you have arcing. If so that may be your noise.
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Fletch in VA
05-12-2013 08:51:57
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Re: Engine tapping on startup in reply to Fletch in VA, 05-12-2013 08:50:25
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It is an 8n 1951 model tractor.
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