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?
- Thread starter gatorwade
- Start date
Bruce (VA)
Well-known Member
Skip Burney
Member
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.
tractorguy2
Well-known Member
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.
don't it makes a ting, ting, ting noise.
teddy52food
Well-known Member
Head has been planed & when the piston gets hot it expands enough to touch the head.
Charner (MS)
Member
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.
Ultradog MN
Well-known Member
- Location
- Twin Cities
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...
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...
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
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
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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