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Stihl 064 piston/cylinder...should I go Magnum or big bore?

Discussion in 'Chainsaws and Power Equipment' started by Scotty Overkill, Jan 12, 2016.

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  1. NewToStihl

    NewToStihl

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    It does look like the 064 cylinder bolts are M5 whereas the 066 uses M6.
     
    NewToStihl, Jan 13, 2016
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  2. NewToStihl

    NewToStihl

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    I think that's do-able. Decide whether you'd like to try to get your cylinder repaired or replaced and let us know. I'm all for getting that cylinder repaired instead of chucking it in the trash. I talked to Shaun Carr about getting a plug hole welded up and re-threaded for an MS460 a year or so ago. I think he wanted $40 or $45 plus shipping both ways IIRC, which isn't bad at all if that's still his pricing.
     
    NewToStihl, Jan 13, 2016
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  3. mdavlee

    mdavlee

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    Mag craft or Shaun can weld it up. The 066 cylinder fits but you should probably tap the case threads to M6 size and there's a little slotting of bolts holes if I remember right.
     
    mdavlee, Jan 13, 2016
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  4. angelo c

    angelo c

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    Heck the shipping would be the only cost if you could have it tigged up. i can get 10 "plugs" for the thread repair kit I have for $11 at NAPA/Autozone.
    Shawn Carr could do the entire repair for you and make the thing look "un repaired" if that matters. See if you have any broken cases or anything else to send while at it. He's a good dude.
     
    angelo c, Jan 13, 2016
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  5. WeldrDave

    WeldrDave Military Outpost Moderator

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    I've welded a couple and to be honest sometimes it can warp the jug. Mastermech did one of my jugs on the 441 mag with the helix and it seemed perfect! :) But he also put a big bore kit on it for me so I didn't use the factory one that he fixed, Although I have it. He has the tool for the tread repair. I'll be happy to weld it up if needed Scotty.! :)
     
    WeldrDave, Jan 13, 2016
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  6. angelo c

    angelo c

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    and I'd be happy to go down to Dave's and watch...( and learn me sum welderin) I have a Rethread kit as well. [​IMG]
     
    angelo c, Jan 13, 2016
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  7. angelo c

    angelo c

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    OK,
    for you guys that know welderin...I realize the concern for warping the cyl due to the thinness of the Aluminum at the thread base. what if any actions could be taken to mitigate the risk?:
    Special machine ? Big honking Dynasty-Syncrowave 350+ ?
    heat sink ?
    very thin slow passes around the threads in a slow, slow buildup ?

    Ignorant wanna be welders wanna know( ok just me wants to know)
     
    angelo c, Jan 13, 2016
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  8. mdavlee

    mdavlee

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    You can preheat the whole cylinder so it's all warm and cools down at the same rate instead of the heat running away. Another way would be to put a mandrel inside to absorb more heat into it instead of the cylinder. I don't know what Shaun does when he welds them. I've never asked. I just pay and get my parts back fixed.
     
    mdavlee, Jan 13, 2016
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  9. Scotty Overkill

    Scotty Overkill Administrator

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    Let me break it apart and see what we can figure out! I'll be in touch guys!
     
    Scotty Overkill, Jan 13, 2016
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  10. Scotty Overkill

    Scotty Overkill Administrator

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    I actually have some older Stihl parts that I'd like to have welded, does he do repairs on the magnesium handles and such?
     
    Scotty Overkill, Jan 13, 2016
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  11. Scotty Overkill

    Scotty Overkill Administrator

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    Preheating it with a propane torch or the like does help. I have a guy out the road that does custom street rod grilles, he may be able to TIG it for me...I appreciate all the help guys.
     
    Scotty Overkill, Jan 13, 2016
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  12. angelo c

    angelo c

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    If the custom guy does the job he has to post a "RE-build" a cyl thread !!!! :campfire:
     
    angelo c, Jan 13, 2016
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  13. WeldrDave

    WeldrDave Military Outpost Moderator

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    Yes it does, and I even use a temp probe. Aluminum will start it's melt at right about 1200* so you gotta be on target. I like a preheat oven when doing casting and try to get it at 500 to 750 prior too the weld. I also throw an asbestos blanket after for post cool down "SLOW" this will USUALLY stop any disfiguration. Although it still can happen.
     
    WeldrDave, Jan 13, 2016
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  14. clemsonfor

    clemsonfor

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    You could cool it in the oven right? Step the temp down. Say move it down from 700 to 500 then 30 mins later down to 300 then 200 then turn it off?
     
    clemsonfor, Jan 13, 2016
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  15. WeldrDave

    WeldrDave Military Outpost Moderator

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    Sure, the problem with any casting is it cooling quickly or shock cooling. Like when people put cold water in an engine overheating, you can warp or crack a cylinder head quick! For a small cast, the asbestos blanket works well. I did many cast pump housings, sometimes they work, sometimes they re-crack.o_O It all depends on the quality of the castings, nickel content, carbon and junk metal in it, bla, bla, bla... Sadly, much of anything "made in china" I just throw away. German, most Japan and most European can be fixed. I recently welded an MTU pump up, supposed to be a good casting. Broke as soon as it cooled going back together! :whistle::zip: So, my honest thoughts are, its a hit or miss.
     
    WeldrDave, Jan 13, 2016
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  16. Scotty Overkill

    Scotty Overkill Administrator

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    Did you ever quench in heated sand before? I was told that works well.
     
    Scotty Overkill, Jan 13, 2016
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  17. Scotty Overkill

    Scotty Overkill Administrator

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    I've done a lot of TIG welding before on aluminum and stainless where I used to work. I had all the training and was ready to certify but the outfit I worked for wouldn't certify me.....it would've given me a pay increase and they didn't want that. It was a high-dollar, square wave machine. Wish I had the money buy a nice TIG but it just isn't in the cards for me right now......
     
    Scotty Overkill, Jan 13, 2016
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  18. pantelis

    pantelis

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    You can do it without have any problem , using TIG or MIG welder cylinder is a simple aluminum the same as the coca cola tinkers are
     
    pantelis, Jan 13, 2016
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  19. pantelis

    pantelis

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    The Tig or Mig welder need about one minute for feeling the all hole maybe under a minute the driling and threading procedure you can do it your self or maybe some other member near can help you , i really dont know how must cost for some seconds welding procedure
     
    pantelis, Jan 13, 2016
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  20. pantelis

    pantelis

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    Dont bet nothing a AC-DC Tig or MIG can weld materials that is 100 times more complex that the cocacola tinkers aluminum that they use to theese cylinders, even a simple stick electrode can weld them without any problem
     
    pantelis, Jan 13, 2016
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