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Ford 9N, 2N & 8N Discussion Forum
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9N top end noise

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gatorwade

05-17-2017 16:03:23




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Recently purchased, but not running. Replaced fuel system and ign parts. Despite anemic starter she starts, idles and runs. No smoke or oily exhaust. O Boy sez I, but after running a while a taptaptaptap or tingthingting noise comes from the front upper end of engine. Pulled valve covers, all clean, intact and clearanced. What's up with this?




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gatorwade

05-23-2017 08:26:39




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 Re: 9N top end noise in reply to gatorwade, 05-17-2017 16:03:23  
Thanks for all the helpful comments and suggestions. I haven't picked up the wrenches in the tractor shed since I posted this. Busy in the seat of another 9N pulling a mower through the spring grasses in the orchard. I had to pull the governor to get the valve cover to clear the stud, so I will check that too. We have been running 9N's and 8N's on our farm for 40 years. Thought I had seen it all. So when tingtingtingting showed up it was a Huh? Whut? moment. I will report back when I finish checking it out. Thanks again.

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9njunkie

05-18-2017 19:59:32




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 Re: 9N top end noise in reply to gatorwade, 05-17-2017 16:03:23  
hiya

2 things
First... If you have ruled out water pump and fan blade as others suggested go get yourself a mechanics stethoscope... That is a very valuable tool for tracking down such internal engine noises.

Second, the last N we had in the garage here had something similar, more of a loud ticking almost a engine knock. Using the stethoscope figured out it was the guts of the govonor were badly worn. Easy fix... They sell re build kits on this site very reasonably priced.

Let me know what you find, always curious to see what it ends up being.
Good luck

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Ultradog MN

05-18-2017 09:47:02




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 Re: 9N top end noise in reply to gatorwade, 05-17-2017 16:03:23  
I have had a couple of top end issues that made a rattle.
One was caused by a broken ring which made a tinging sound. Another was an engine with a significant rattle in the top end. I pulled that engine apart twice before I finally found the cause. It ended up being the ring groove on one of the pistons was way too wide allowing the ring to rattle as it went up and down. Dunno how I missed it the first time but I did and now check that ring clearance carefully.
I also had an engine that they had bored .030 over then installed .020 rings on the pistons. It wasn't noisy but talk about blow by...

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Charner (MS)

05-18-2017 05:11:42




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 Re: 9N top end noise in reply to gatorwade, 05-17-2017 16:03:23  
I had a similar situation. I pulled the head and found a loose sleeve. you will also be able to see if valves are working properly.



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teddy52food

05-17-2017 20:14:07




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 Re: 9N top end noise in reply to gatorwade, 05-17-2017 16:03:23  
Head has been planed & when the piston gets hot it expands enough to touch the head.



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TOM N MS

05-22-2017 14:42:52




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 Re: 9N top end noise in reply to teddy52food, 05-17-2017 20:14:07  
Gets my vote..seems very likely..



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tractorguy2

05-17-2017 20:05:35




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 Re: 9N top end noise in reply to gatorwade, 05-17-2017 16:03:23  
My 9n anytime I remove and replace the hood. I have to make sure I get the hood/radiator to clear the fan on the left side. If I don't it makes a ting, ting, ting noise.



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Skip Burney

05-17-2017 19:39:11




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 Re: 9N top end noise in reply to gatorwade, 05-17-2017 16:03:23  
Try grabbing the fan blade with the engine not running and see if it wobbles from side to side. If it does you have a bad water pump and like Bruce said be careful it may end up going though the radiator or the fan blade may be just hitting the fan shroud.



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Bruce (VA)

05-17-2017 17:57:00




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 Re: 9N top end noise in reply to gatorwade, 05-17-2017 16:03:23  
Could be the water pump. Be careful; a bad pump will launch the fan into your radiator.



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ratface

05-17-2017 17:20:40




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 Re: 9N top end noise in reply to gatorwade, 05-17-2017 16:03:23  
Disconnect the fan belt to eliminate the water pump and go from there.



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