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Beginner needs help with TNX 5.2r engine.

Beginner needs help with TNX 5.2r engine.

Old 03-17-2007, 01:26 PM
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Default Beginner needs help with TNX 5.2r engine.

New at hobby. Truck worked great at first then started screwing up. Need some help to understand how this works. Will make this quick. Engine is off the truck. When I spin the flywheel by hand should it turn over the piston(like its attached) or should I feel it slipping. With the flywheel on and the flywheel nut tightened but no cluch bell shoes(I have new ones)or anything else should the piston turn. It doesn't turn over. With the clutch bell shoes and clutch bell assembled and ready to go I can turn the flywheel and feel the clutch bell shoes turning over the flywheel nut but not turning the piston. Would the taper collet which slides over the crankshaft between the engine and the flywheel have anything to do with this. I can see it in the manual but can't see it on the engine unless it sits in the center of the flywheel or in the crankshaft bearing. If anyone can give me some info on how this works(from the crankshaft turning, to how it turns the flywheel and clutchbell shoes) it would be greatly appreciated. It would answer some questions for me. Thank you very much. Ken Guelph, On, Canada.
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Old 03-18-2007, 12:27 AM
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Turning the flywheel does turn the crank, so yes the piston should be moving. But I'm a little confused on how you discribed everything, is the flywheel your refering too part of the clutch bell or is it pressed on before the clutch assembly? Was the flywheel off at one time and isn't pressed on anymore? Take out the glow plug and turn it over and peek inside to see if the piston is moving. If the motor is new its tight at first until broken in, this might cause the flywheel to slip if it not pressed on correctly. Can you take some pics of it for us?
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Old 03-18-2007, 03:26 AM
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Sounds like you have no collet between the fly wheel and the crank shaft?? The brass tapered collet is the first part to go on when assembling the flywheel/clutch to the motor. When the flywheel is pushed onto the tapered collet it causes a friction point between the two, which in turn causes the flywheel to turn when the crank rotates...

Hope this helps, good luck!!
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Old 03-18-2007, 06:17 AM
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Thanks for the reply. That makes sense. I can't see the brass collet. Now I just have to find one. Any ideas?
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Old 03-18-2007, 08:08 AM
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Try the tnx thread...
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Old 03-18-2007, 07:27 PM
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The collet usually gets stuck to either the engine shaft or inside the flywheel.
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