BT89

Well, i just finished my rebuild and when I go to start the engine i can hear a clunk clunk clunk,It sounds like its the front rotor. Basically it sounds like its just bouncing around in there.. and when I do get it started it wont idle. I let off the gas and it dies. I've tried messing with the air and fuel screws and it doesnt help. any ideas for either of my problems? I've already tried finding previous threads. If anyone has a link then your more than welcome to direct me to it.

jjwalker

To be honest, if I heard mechanical banging, I would immediately take the engine back apart. Our engines have a smooth, vibrationless, non mechanical feel to them. Anything other than that, there is a problem. If your front rotor is just wobbling around inside the chamber, then you'll need a new front iron, and new rotor housing and new intermediate housing.

I am not sure what would allow a rotor itself to contact the housing other than a warped eccentric or a broken stationary gear. If anyone else has any idea, I am curious myself lest I find myself in the same situation some day.

yudaya

accually about a year ago i read a topic on here...no im not trying to make anyone feel bad or anything.. but it is possible to put the rotor in backwards as to have the stationary gears on the rotor facing the rear of the motor,, this person that wrote this thread meantioned somthing to the sorts of what your describing...im not saying you werent paying attention but hey ive almost done it before. so i personally know its possible...because they are supposed to face opposite directions...or perhaps a bearing didnt get pressed back in i know our motors make a ugly clunking sound when we spin rotor bearings(yes its possible...---->supid pressure oil line popped on the freeway and i didnt notice...)also when this happened to me it made the motor have a hard time to try and idle.

yudaya

i put a motor together and then realized ,oh **** my new bearings are still sitting on the table top

jjwalker

Ouch. I don't know what else to say.

Aaron Cake

iTrader: (1)

It is not possible to assemble an engine with a backwards rotor.

Of course, the old bearings were still in the rotors and stationary gears, right? If not, I can't fathom how an engine could be assembled without any bearings. The eccentric and rotors would flop around so much during assembly that something obvious would be wrong.