YM336D - Started knocking loud while tilling

[Car Doc]

thats interesting Cardoc, I wonder if they actually came off in that order or just placed that way once they were removed from the rod

Hard to say grainger what order they are in but it wouldn't matter if you look at all of them and imagine any way to switch them around you wont find one that puts the tabs on opposite sides.

The reason I even say all this is a while back (and I keep posting the backwards cap scenario) Domush indicated he probably had the 1% that were opposite is why I am doing the research for him gathering facts.

I had 1 piston out of my similar tractor a couple years ago but I just cant swear how they were so thats why I simply couldn't state yes this is the way it is w/o the research now I am 100% positive the tabs are on the same side.

 

[Barry 1]

Go to the HOYE site,There is a good picture of a rod for a YM336,and it shows that both the tangs are on the same side.

 

[Car Doc]

Now you tell us! :laughing: :thumbsup:

 

[tcartwri]

NOTE: I want to make one more comment of caps on backwards uhhum... upon close inspection of the pics of the old bearings I see a wear mark on the lower shell off on one side, a line coming off the edge of where the tab is bent out of the shell that corresponds with a similar mark (as expected) on the upper shell..

Dude, you need to get off your horse and have a cold one. I mentioned the reversal of the caps because it is easy to do on re-assembly. I never said that's the way they came out of the motor. It was meant as a caution for Domush.

If the rods are bent he will see it in the plastigauge. More likely the thrust bearing is partially wiped because this motor has had no maintenance ever in it's life, was obviously siezed at some point, in addition to having no fuel or fire in #2 for ever.

You are correct that he should have checked the piston height when he had it apart.

fwiw >> been drag racing and building my own junk for 30+ years. Not my first rodeo either. :thumbsup:

 

[bruce1966us]

I have been down this road often. There is nobody in the usa with more experience working on these little critters, nor anyone else with more inventory of engines than I have. My phone number is 9314920316 and my email is bruce@yanmartractorparts.net this thread is getting out there.....

 

[Car Doc]

Dude, you need to get off your horse and have a cold one. I mentioned the reversal of the caps because it is easy to do on re-assembly. I never said that's the way they came out of the motor. It was meant as a caution for Domush.

If the rods are bent he will see it in the plastigauge. More likely the thrust bearing is partially wiped because this motor has had no maintenance ever in it's life, was obviously siezed at some point, in addition to having no fuel or fire in #2 for ever.

You are correct that he should have checked the piston height when he had it apart.

fwiw >> been drag racing and building my own junk for 30+ years. Not my first rodeo either. :thumbsup:

I wasn't talking to you dude are you that insecure or what?

Read back a few pages and read what Domush said about putting his caps on with the tabs opposite ( must be the 1%) and see what I was actually referring too geez. Fyi we have been talking about that long before you poked your head in. hahaha

Its you that need to get off the horse :laughing: and you think that pointing out the obvious ("has had no maintenance ever in it's life")("You are correct that he should have checked the piston height when he had it apart." not cool btw thats not what I said) makes us think you know something? You haven't been reading what been said by all the other guys who do know engines!

Well maybe you need to actually participate in helping Domush rather than trying to make you look knowledgeable which isn't working btw. :laughing:

Oh and just for conversation just how would he see a bent rod in plastigage accurately thats a new technique I never heard that one? I am under the impression an old bearing isn't enough to convince you so you resort to a piece of wax thats rich man hahaha!

Or lets look at it this way to get down to your level-if he could see a bent rod in the wax why didn't he? humm

PS: "building my own junk for 30+ years" probably about says it all right there.

 

[Domush]

Bah! So much bickering. No need to respond to any naysayers. I fact check everything mentioned, anyway. If you think something is bad or fine, just mention it and why you think it, so we can all learn, even the pros. There is a science to it and together we can figure out what needs to be done to fix it.

You won't see me taking sides, as if I knew enough to take a side I wouldn't need the help. Try and recall why you're helping, put your evidence and conclusions into the mix and we can go from there. No need to get heated or attack. We're all looking for a positive outcome.

It's raining today, but tomorrow I'll be swapping the bearings of #3 and #2 in order to check if there is something messing with the placement of #3 bearings and at the same time checking for defective bearings. If the gap improves I'll button it up and move on to testing the pump timing.

From there, well, one thing at a time.

As always, thank you all for helping me with this rebuild. I might have been this far without help, but with your help I'll have it running again in short order. Don't give in just yet!

 

[KubotainNH]

Bah! So much bickering. No need to respond to any naysayers. I fact check everything mentioned, anyway. If you think something is bad or fine, just mention it and why you think it, so we can all learn, even the pros. There is a science to it and together we can figure out what needs to be done to fix it.

You won't see me taking sides, as if I knew enough to take a side I wouldn't need the help. Try and recall why you're helping, put your evidence and conclusions into the mix and we can go from there. No need to get heated or attack. We're all looking for a positive outcome.

I was thinking this yesterday but you said it well. Hopefully you find the bearing is different from the others.

 

[Garybake]

It's raining today, but tomorrow I'll be swapping the bearings of #3 and #2 in order to check if there is something messing with the placement of #3 bearings and at the same time checking for defective bearings. If the gap improves I'll button it up and move on to testing the pump timing.

From there, well, one thing at a time.

As always, thank you all for helping me with this rebuild. I might have been this far without help, but with your help I'll have it running again in short order. Don't give in just yet!

Sounds like a plan, Domush:thumbsup:.

 

[Neat 1500]

another thing i thought of was did you machine the crank? i dont remember reading that. it is possible that if it was done it may have not been machined properly.