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  1. #1
    RC Enthusiast
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    Newbie + winter break in - temp gun - experience + upside down truck = lesson learned





    Very expensive lesson learned........
    Last edited by Double G; 01-17-2013 at 03:32 PM. Reason: updated links

  2. #2
    RC Champion
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    oops
    With great brushless comes great responsibility.

  3. #3
    RC Champion
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    Bet you don't do it again. lol
    I never use a temp gun...never had a prob...weird.
    "I like rc cars"....."WHAT? YOU'RE KIDDING!"

  4. #4
    RC Competitor
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    May 2012
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    Lake Charles, LA
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    No heatgun = spit test. If it sizzles on the head its too hot. Lol

  5. #5
    RC Qualifier
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    Dec 2011
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    Okanagan Valley B.C.
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    I would strongly suggest that instead of spending over $100 to rebuild your 3.3 look at spending your money on an os 18 or an os 21.

    The os 18 is around $150-180 and the os 21 is around $250-300.

    I have the os 21 and if it ever fails I think I'll try the os 18.

    I rebuilt my 3.3 three times before making the switch and I regret waiting so long.

    Just my 2 cents
    O.S.21 Nitro Revo, Stampede 4x4, 2 Axial Honcho's

  6. #6
    RC Racer
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    Nov 2012
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    You really would think traxxas would update the conrods in the 3.3
    I mean this is obviously pilot error but still the rod always snaps in the same spot
    Do yourself a favor if its rebuildable do it , learn to tune good then upgrade to a better engine such as the os 21tm, the 18tm is discontinued s9me time ago
    If it were me id stick to the 3.3 worst case you can get a brand new without a carb for like 85 bucks

  7. #7
    RC Racer
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    Oct 2012
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    north east iowa
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    Did you have a sock on the head to keep temps up and be able to richin it up?
    If it ain't broke, fix it till it is! BB Revo

  8. #8
    RC Enthusiast
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    Chicken man , there's a reason these are so cheap compared to race cars... Quality is the normal suspect for low prices


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  9. #9
    RC Qualifier
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    I may be wrong but tower still has the os 18 listed.

    http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXHLV6
    O.S.21 Nitro Revo, Stampede 4x4, 2 Axial Honcho's

  10. #10
    RC Competitor
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    May 2012
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    Lake Charles, LA
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    I'm not sure if thats a drop in motor. That's a tz not the tm that everyone goes with. It's a turbo. I have an os .21tm and love it.

  11. #11
    RC Champion
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    That motor is the same block as the 18tm and is a direct drop in. The 21tm is a way over priced motor. You will be just fine with a 3.3 once you learn the proper characteristics of it.
    2009 Florida State Monster Truck Champion
    RBMods

  12. #12
    RC Competitor
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    Apr 2005
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    Massachusetts
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    I believe you will find the 18TZ requires a starter box. No extension on crank for one-way bearing / starter. I also believe that, when new, the pinch on the 3.3 engine puts a lot of unnecessary stress on the connecting rod. Until you get them properly broken in, it is wise to pre-heat engine before starting to eliminate some of that stress. Hope this helps. Good luck.
    My wife don't understand!

  13. #13
    RC Champion
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    Mar 2009
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    if you are a newbie the 18TZ will take a little more than just dropping it in and getting it to work.. the traxxas nut will not fit.. so the traxxas clutch will not fit... M2c makes a nut that fits that type of crankshaft.. but again its a little more work, if you not mechanically inclined it can become a chore... plus the one pictures is a bumpstart version... and also the EZ start will not mount up to any TZ

    that being said when we used to race.. the 3.3 always got the job done.. and you can get 6 gallons of racing conditions out of it...
    you know.. i never had a sig.. but i do now...

  14. #14
    RC Enthusiast
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    magnolia tx
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    OK , so i waited a few days thought about some different motors did a little research and went to the hobby shop and got some advice. Decided to give the 3.3 another shot before going straight to something else. I'm well aware that i made some mistakes with the engine from day one, and most likely everyday until i broke it. The weather should be nice this weekend and i just finished putting the new motor in and getting everything put back together and ready for break in tomorrow.
    i Just had one question, and it was something i noticed even with the old motor. I have trouble getting the air filter onto the carb because of how close it is to the spur gear and it looks like it actually rubs against each other. the rubber piece from the original motor and air filter assembly had a hole worn in it were it was touching the spur gear. Is this normal or is something not aligned correctly?

  15. #15
    RC Champion
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    sounds like a bent chassis...
    you know.. i never had a sig.. but i do now...

  16. #16
    RC Enthusiast
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    magnolia tx
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    hmmm i dont like the sound of that...

  17. #17
    RC Enthusiast
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    Jan 2013
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    What you are experiencing is flex. Usually when u take decent hits against the front or rear. If its touching while just sitting on something isn't right


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  18. #18
    RC Enthusiast
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    any way to fix that?

  19. #19
    RC Racer
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    Surely it cant cost too much to upgrade the rod with a bushing on the small end
    But I guess if people keep breaking rods its more money in traxxas' s pocket

  20. #20
    RC Enthusiast
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    Well it's less money for traxxas as they cover this stuff under warranty. It's not as easy as a new bushing, more material at the top of rod design of the top of rod and how the new bushing will effect the piston pin etc.


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  21. #21
    RC Racer
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    I dont think this engine will be covered under warranty

  22. #22
    RC Enthusiast
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    Yeah I doubt it very much for this engine as obviously user error but quality didnt help.


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  23. #23
    RC Racer
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    Nov 2012
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    you know i think everybody blew their first 3.3,mostly due to inexperience
    my first one ran that lean it melted the on-board temp gauge wires to the block,turns out i didnt know how to tune very good at that stage

  24. #24
    RC Enthusiast
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    Jan 2013
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    I still have my first 3.3. Off the first revo 3.3. It's been to space an back a few times but the simple thing of smoke is good helped me alot


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  25. #25
    RC Champion
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    A tm crank and starter shaft/backplate will do the trick.
    erbe emaxx 26maxx s27revo 18tmrevo XXL platinum

  26. #26
    RC Champion
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    after buying a TZ and the buying all that to make it work.. might as well buy a 21TM
    you know.. i never had a sig.. but i do now...

  27. #27
    RC Competitor
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    +1 to kgombe

  28. #28
    RC Champion
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    Actually, there's a 18tz-tx available now. It's pretty much ready to drop-in by the looks of it.
    erbe emaxx 26maxx s27revo 18tmrevo XXL platinum

  29. #29
    RC Champion
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    that engine has been out for a long time.. it actually comes with a rotary carb and a different crank also.. you need an end piece of some sort...
    you know.. i never had a sig.. but i do now...

  30. #30
    RC Champion
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    That stinks. I guess I'll get whichever one's cheaper then. I already have a bunch of new tm parts, including an 11k.
    erbe emaxx 26maxx s27revo 18tmrevo XXL platinum

  31. #31
    RC Racer
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    Jan 2012
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    Duncansville, Pennsylvania
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    102
    The air filter/spur gear problem is a bent chassis. A new chassis is only like $10, but replacing it can be a chore.

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