034 pistons open or closed window/ based on open or closed port cylinder

[Chainsaw Jim]

If so why does meteor offer open and closed port pistons for the 46 mm stihl. 034 please explain the reason. This is why i created the thread thanx.

Maybe because there's some confusion somewhere?
I just don't see that style of bottom feed quad port non-windowed piston working with either open or closed port 034.

I only have the windowed version but these pics still show the general whereabouts where the "ear" on each side lands when the upper transfers first crack open...
And at BDC...
There just doesn't seem to be anywhere for the incoming charge to get by.

 

[jacob j.]

Honestly wouldnt know how to fit up and check. Any suggestionsView attachment 102160 here is pic of the meteor 46 mm closed window piston.

That looks like an 029 piston. You better verify the wrist pin size.

 

[Cracker Boy]

Ok

 

[Deets066]

Maybe because there's some confusion somewhere?
I just don't see that style of bottom feed quad port non-windowed piston working with either open or closed port 034.

I only have the windowed version but these pics still show the general whereabouts where the "ear" on each side lands when the upper transfers first crack open...View attachment 102210
And at BDC...View attachment 102211
There just doesn't seem to be anywhere for the incoming charge to get by.

Sure would be hard to feed with the non windowed piston

 

[Motorhead]

That looks like an 029 piston. You better verify the wrist pin size.

Dats what I was tryin to splain

 

[Cracker Boy]

That looks like an 029 piston. You better verify the wrist pin size.

Will do when it arrives

 

[Deets066]

Maybe because there's some confusion somewhere?
I just don't see that style of bottom feed quad port non-windowed piston working with either open or closed port 034.

I only have the windowed version but these pics still show the general whereabouts where the "ear" on each side lands when the upper transfers first crack open...View attachment 102210
And at BDC...View attachment 102211
There just doesn't seem to be anywhere for the incoming charge to get by.

But with some creative grinding you might have somthin

 

[huskihl]

The windowed piston is definately for the closed port jug. But without grinding some out, that solid piston isn't gonna work in the open port 034. It's made for a bottom fed transfer like the full open 029. I'd use the windowed one in both

 

[Deets066]

The windowed piston is definately for the closed port jug. But without grinding some out, that solid piston isn't gonna work in the open port 034. It's made for a bottom fed transfer like the full open 029. I'd use the windowed one in both

Yeah, Jims picture makes it pretty obvious

 

[Cracker Boy]

Im gonna check with vendor tomm.i hope he didnt send me wrong piston.thanx @Deets066 @Chainsaw Jim @jacob j. @Motorhead @huskihl. For advice i did specify to vendor 034 46 mm i know after looking at 029 cylinder pics on line it may be what hes shipping me.i think @jacob j. May be right i called stihl and they only show one piston wich is open window.this is why i created this thread.i hope i dont look like a dumb ass if he sent the wrong piston for me.

 

[Deets066]

Im gonna check with vendor tomm.i hope he didnt send me wrong piston.thanx @Deets066 @Chainsaw Jim @jacob j. @Motorhead @huskihl. For advice i did specify to vendor 034 46 mm i know after looking at 029 cylinder pics on line it may be what hes shipping me.i think @jacob j. May be right i called stihl and they only show one piston wich is open window.this is why i created this thread.i hope i dont look like a dumb ass if he sent the wrong piston for me.

Who did you order it from?

 

[Cracker Boy]

Who did you order it from?

Im not gonna mention that. I dont wanna drag anyone through the mud or be a bus driver.i will reach out tomm.he did say if it wasnt what i wanted hed send other with return label when he got more in. were all humani just feel dumb if so and i created this thread for nothing. id never heard of it and i know there were sev. cylinder changes so i assummed when he told me that it may be better. I will be honest i highly respect you guys and your knowledge. When yall start talking charges and releasing and opening and closing im as lost as a hoe in church sometimes Thanx again bro.

 

[Al Smith]

More than likely it would not cool right with a solid piston .More over I've never seen a Stihl 034 with an open port transfer design .Although for reasons unknown to me I have seen the bottom transfers carved out so it's a straight shot into the crankcase .I'm not so certain what that's supposed to do

 

[Cracker Boy]

Well guys he did say it was 029 piston and the wrist pin is the same size and bore. So good catch @jacob j.. Thanks @Chainsaw Jim @huskihl. For the explanation and pics to clarify things.from beginning i thought something was weird. That deff. Helped

 

[Motorhead]

 

[Chainsaw Jim]

View attachment 102338

It wouldn't have been before the NE hit the market.... which is where my mind was during that thought.

 

[Cracker Boy]

Vendors wtf

 

[dustinwilt68]

Here is pic of 034 I had laying around, new oem with windows

 

[Cracker Boy]

Here is pic of 034 I had laying around, new oem with windows

You need it or wanna part with it.if so let me know thanx dustin

 

[dustinwilt68]

Have no use for it at this time.