Stihl 044 10mm piston issues

[Trent Curtis]

I’m not a Stihl guy and I know these saws came with more than one crank/piston combo

this one is a 10mm wrist pin...... so I ordered a meteor piston for the saw...... put it on and something is off. There is some serious machine difference here....... this piston can walk a good 1/4”+.

am I missing something? Or is this just a poorly manufactured product?

Trent

 

[cuinrearview]

I'd say wrong piston Trent.

 

[pioneerguy600]

View attachment 773235 I’m not a Stihl guy and I know these saws came with more than one crank/piston combo

this one is a 10mm wrist pin...... so I ordered a meteor piston for the saw...... put it on and something is off. There is some serious machine difference here....... this piston can walk a good 1/4”+.

am I missing something? Or is this just a poorly manufactured product?

Trent

Its a well known issue with the Meteor piston for the 10mm pin application, the company refuses to correct this situation, they have been contacted about this many times. Many have run them as is without failure but we all know its not the best.

 

[Trent Curtis]

Its a well known issue with the Meteor piston for the 10mm pin application, the company refuses to correct this situation, they have been contacted about this many times. Many have run them as is without failure but we all know its not the best.

thanks for the info- I guess going cheap was a waste, cause there’s no way I’m running it like that. I’ll pitch the meteor junker and order OEM.

running like that would certainly shorten the life of the big end/crank bearing.

 

[burnses]

is it that the pin bore boss is machined so there is little clearance on one side..?

 

[Trent Curtis]

is it that the pin bore boss is machined so there is little clearance on one side..?

I pushed the piston to one side to illustrate the sloppy tolerance.

 

[Moto Vita]

I wonder if there's a different bearing that you're supposed to use with that piston?
The piston isn't going anywhere once the cylinder is installed but it looks like the bearing could find it's way to one side or the other and possibly cause problems.

 

[computeruser]

OEM didn’t cost all that much the last time I bought a 10mm piston. And it all fit as it should.

 

[pioneerguy600]

I wonder if there's a different bearing that you're supposed to use with that piston?
The piston isn't going anywhere once the cylinder is installed but it looks like the bearing could find it's way to one side or the other and possibly cause problems.

What Meteor did was use the piston for a 12mm pin rod end, just make the pin bore smaller, the 12mm rod is wider and fits the piston quite well, however the 10mm rod end is much narrower than the 12mm one and there is too much clearance on either side. There is no different pin bearing for this application. Spacer bushings can be made up to keep everything centered, many of us have gone this route, hard brass and Delron have been used successfully.

 

[Trent Curtis]

OEM didn’t cost all that much the last time I bought a 10mm piston. And it all fit as it should.

where did you purchase your OEM piston?

 

[computeruser]

where did you purchase your OEM piston?

As I recall, one came from eBay as a NOS part and another from my Stihl dealer.