Mini engine parts broke this time

Tiger Small Engine said:
Knowing the intake valve versus the exhaust valve, does matter. When the valve guide doesn’t allow the valve to operate correctly and is at an abnormal height, that is called a pushed valve guide. Punctuation correctly used versus one giant run on sentence also matters. Don’t sweat the small stuff, it is all small stuff.
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Tiger I fully am aware of this and I should have never said what I said in the meantime I'm trying to upload what my setup looks like just took a photograph
 

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Tiger Small Engine said:
You are trying and learning and that is a good thing. I was being a bit of a smart Alec. Keep at it.
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I have watched videos where say 6 yrs ago the person kept saying the lower valve is the exhaust value and what happens next folks like me would then use the STEEL pushrod for the intake valve. The point is anytime I see something that might be wrong in labeling I point it out for the next person.
 
JimP2014 said:
Tiger I fully am aware of this and I should have never said what I said in the meantime I'm trying to upload what my setup looks like just took a photograph
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Also for the photo I posted maybe I need to spin the flywheel a few times to see how those sleeves change? I assume those sleeves should never change because they are in a fixed postion in theory?
 
JimP2014 said:
Tiger I fully am aware of this and I should have never said what I said in the meantime I'm trying to upload what my setup looks like just took a photograph
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"pushed valve guide" <--- thanks for this I get it IF the image I found on the web depicts that!
 
Auto Doc's said:
The valve guides are bronze and pressed into the head at the factory and with excess overheating, they will creep upward out of the head over time.

Look between the coiled sections of the valve spring to see if the guide is raised upward towards the round valve retainer. If you can push on the top of the valve spring assembly and the travel is stopped in a short distance, that means the valve guide has moved upward. The valve springs have fairly strong tension so it will take some effort to push them down.

Teryll Fixes All has a good video about this problem and a solution, but I do not recommend it if you have limited repair experience.
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AutoDoc I think I get it now what you mean by this, I would never think this is possible but I have seen photos of what you are saying!!!!
 
JimP2014 said:
If the guide is raised up, it is due to repeat overheating, and the head will need to be replaced. <----------- I don't know what this means if it's raised up isn't it like secured with bolts or screws is there a different way you could say this cuz it doesn't make any sense to me.

Thanks,
Jim
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I think I now know what this means and I will check it out!!!
 
Yes the exhaust valve is on the flywheel side and that valve guide has definitely moved out according the image posted. And something had to give. New head comes with everything assembled with gaskets except the push rods which are also needed.

I don't recommend that repair hack of the valve guide as the head can also be warped from the excess heating.

And it now appears someone has been in that engine before as the push rods were mixed up on the cross flow head.

These valve guides are pressed into the head so a little knurling of the guide would be the best option if the head is not warped. But most of us don't have a lathe with a knurling attachment. And it is not worth the cost of adding this option to our lathes just for a rare once in a blue moon job. Now a regular machine would have this tool as I have had shafts knurled before because loose bearing fit because the OEM under sized the shafts by .001-.002". This loose fitting cause the bearing inner bearing the wear the shaft journal down. I just seen the same problem on a Bad Boy ZTR spindle shaft.

The cylinder around $100 plus SHC. Dropped the B1 when looking for the part online. Internal code here.
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StarTech thank you so much for this response I will read the entire entirely when I get in front of my PC it's just a lot easier but one thing that I'm not sure about are you saying the photograph I actually took of the cylinder head for my machine is broken or are you saying the photograph that I found on some website is broken or are you saying both are broken I don't I don't understand what you mean exactly about the cylinder head for my machine which is like a close up but it has no labels on it could you please clarify that?

Jim
 
If picture in post #21 is of your head then yes the exhaust valve guide has moved outward.

Btw viewing is a lot easier on a regular desktop than a smart phone.

Beside I got a vendor that no one there can get it thru their thick skulls that you can't text a landline phone. They think everyone has a smartphone. It going to cost them another $100 Stihl part order and possibility any future orders. It has already stop me from buying parts JD parts locally because of a smart A salesman.
 
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