Originally Posted by losi_racer

monty i have a problem...

my dad has been breakin in his +4. hes been idleing on the bench keepin temps about 200...

tonight i guess he couldnt get them past 180. i told him to put alum foil on the head but watch the temps. temps got to 220 so he richened it up then it died. now it wont turn over. he called me while i was at work and didnt know...

so i tore it apart when i got home expecting a rod to be broke or something because the piston wont move. i opened it and everythin was fine. i heated it up got the piston down and moved it back up and it will only go about 3/4ths of the way up before it hits the pinch and wont move past the pinch. so i put everythin back together tried movin the piston and i guess it went back to the pinch. i heated it for a good min and the piston still wont move. i can tear it apart again and move it down by pushin the piston like i did the first time but there has to be something wrong. any ideas?? you can reply here or call me 480 277 4177


EDIT: i tried puttin a new collet on the crank because the one on there was just free on the crank. and the new one doesnt have a tight fit either, when i put the flywheel on it seemed like it didnt go back far enough either.