Wich way does the piston go?

[Daniël Bos]

Help!

 

I meant, Help please, ofcourse:001_smile:

 

I've decided to put a new cylinder on an ms180 I'd been given (it ran fine but the exhaust mountings had sheared off). Ordered one from Mr Solutions, got here this morning, all good. I was pleased to see it was a "mahle" kit. They only did a p+c kit so I'm changing the piston as well.

I took the old one off, no problems and made a mental note that the pin goes in from the clutch side, only to find the new piston has both ends equiped with rings!

 

It does have a little arrow on it, but wich way should it point? Carb or exhaust? I cannot see any difference in it at all but I'd like to be sure.

 

Gut says exhaust...

 

 

Oh, I've done everything bar the 8mm nuts that hold the carb on with my new "topsaw" multitool-gadget-thing!

Edited November 5, 2011 by Daniël Bos
speling

[High Scale]

Your gut is right, exhaust.

[Daniël Bos]

Excellent!, thanks, and at such a speedy reply!

I'm straight back to it...

[spudulike]

One word of warning, I have known Chinese pistons to be stamped up wrong, a very general rule is the ring pins are generally on the inlet side but have seen that the Stihl 441 is an exception.

[Daniël Bos]

One word of warning, I have known Chinese pistons to be stamped up wrong, a very general rule is the ring pins are generally on the inlet side but have seen that the Stihl 441 is an exception.

 

Thanks, I've put it on now anyway:biggrin:

When I re-assembled it it made sense to have the rings the way they were. I just looked at it and could not see any difference. A bit like when you're looking for your glasses only to be told they're on your head:biggrin:.

 

I think the piston would be Mahle as well, seeing as the cylinder was, but I did not see any maker's marks anywhere. The c was clearly marked.

 

I'm enjoying the fiddling about with it, everything is spotless, checked for wear everywhere, lubed where appropriate etc. I've not done a rebuild like this before and am having great fun:thumbup: