3.3 tear down

[lesonli]

does anyone have any links that shows the tear down and rebuild process for 3.3? This is my first adventure, and could really use an unconfusing direct approach on it thanks:\

 

[moe7404]

i have only been in r/c for 6 mo. but i have taken a 3.3 apart. but the other guys on this site realy know more than i, about a 3.3 engine. heres my thoughts. 1. clean work area. 2. cleaning fulid, i use methanol. 3 NO OPEN FLAMES 4. take notes on how it comes apart, ie, notch on bottom of piston goes to flywheel. 5. sealant that holds up to nitro, www.racers-edge.com carb sealant 10115. 6. assembly lube, permatex ultra slick, assenbly lube item#81950, any good auto parts house should be able to get it of you, just put a thin coat on all inside parts, it will smoke upon first start, so dont worry. 7. use anti seize compound on any screw going into aluminum, just a dab will do. 8. some times the sleeve is hard coming out of the housing, some times it takes heat to get it out.

 

[lesonli]

bearings

thanks moe. ya, open flames not good. Do ya know if the reont and rear bearings are supposed to be air tight? Just wondering since they sit aroun the shaft, with ball bearings? Since I had air leaks front and back, I can assume they were not air tight. and my piston slides easily up the sleeve till about 1/4 inch to top it starts giving some resistance. Is that where it shoul start pinching/ tightning up?

 

[scootsk]

Just go to the Traxxas web site. They have great tutorials on engine tear downs in their support section. Here is the 2.5 rebuild. I'm sure that the 3.3 is similar. The link tool isn't working. Just copy and paste the below.

http://www.traxxas.com/support/kb_search.php?action=artikel&cat=88&id=93&highlight=33 rebuild

 

[Scrogg]

Traxxas engines biggest weakness is the bearings. They designed a fantstic little engine, but put very poor quality bearings in it. Generall rule from experience....main bearings need replaced every 3-4 gallons, BUT that is only if you change the front bearing every two gallons at the latest. You keep the bearings good and nothing else will actually wear if you tune correctly.
New engines need bearings after the 1 1/2 gallon mark because that is the most stessful point of the engines life.