YM336D bad knocking engine
- Thread starter murnere
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clemsonfor
Super Member
He had someone that he showed the video too. Maybe one-day that guy can swing by to look.
My brother-in-law is very good with engines and only 1 1/2 hours away. He has helped me via phone calls mainly because he is a grain farmer and this is a busy year. Unfortunately, he has been ill recently and just tested positive for Covid. Hopefully in a couple weeks he'll be feeling better and then I'll see if he can help with this adjustment. Until then, I think I may be going to his place and helping him with the harvesting. I'm really starting to think that adjusting the valves is something you should first see someone do to get the feel. I am really using your all's suggestions and I appreciate all the help.
Today I bought a new magnet and I'm going to continue to try to get the nut out.
Today I bought a new magnet and I'm going to continue to try to get the nut out.
clemsonfor
Super Member
Where did the nut fall? Just in the head by the rockers, you should see it.
it dropped down by the push rod (is that the rocker?). When I tried to grab it with a magnet, I pulled out the rod and hit the nut which dropped down another level. I'm guessing that leads to the cam shaft? I can't find a picture that shows all the nooks and crannies of the block, but it dropped a level below where the rod sits.
Altona
Bronze Member
I can't really picture the size of the nut but it should be at the bottom of the "hole" probably sitting on the cam lobe. Unless it is very small I doubt it could fit through the gap beyond that. I do stuff like that all the time murnere. Take it slow and steady and with the right extending magnet it shouldn't be a problem to get it out of there. Good luck, buddy.
CoyPatton
Veteran Member
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- Poplar Bluff, MO
- Tractor
- Yanmar YM2002D with Koyker 110 FEL
Unfortunately, it could be most anywhere in that cavity. While one would hope it would land in a readily accessible spot like the cam lobe ad described, it could (and in my reality probably did) bounce/roll most anywhere. If a bit of probing with a magnet, a flexible one would be better, then it might be time to borrow a bore scope or worse case buy one. The bore scope should allow you to locate where it is and retrieve it.
Altona
Bronze Member
You're probably correct CoyPatton. Again, I can't picture the size of the nut in relation to the gap available to fit through and roll around in. You would certainly know better than I. The scope is for sure the safest and best route to go. Hadn't considered that.
I have looked and can稚 see a thing. Bore scopes aren稚 too expensive, so I may add to my growing tool set.
Sixdogs, yes I did turn the cam. I moved it thinking I could continue checking the valves. When I felt a little tension I stopped, reversed a little and resumed probing with a magnet.
Sixdogs, yes I did turn the cam. I moved it thinking I could continue checking the valves. When I felt a little tension I stopped, reversed a little and resumed probing with a magnet.