Rebuild
Your Engine
Page 4
Get the new piston, the wrist pin and connecting rod and reverse the procedure you just did to remove the wrist pin. Put the thin end of the con rod into the piston.
Notice that the 15FE wrist pin has white plastic on one end and is plain on the other end. The white plastic is PTFE; this end of the wrist pin should face to the outside of the piston. Now slide the wrist pin through the piston hole and through the con rod. Make sure the white end faces to the outside, as shown. If the engine you have uses wrist pin clips, make sure to attach those now.
Set the piston/con rod assembly aside and clean the top of the engine case carefully. Using a rag or towel sprayed with Nitro Car Cleaner or another degreaser, wipe from the inside edge to the outside. This will help prevent dirt from falling into the engine case.
Now we will start the process of installing the new piston and sleeve into the engine case. HPI engines have a notch in the top of the sleeve. This notch must face to the rear of the engine (towards the pullstarter or back plate). Find this notch and insert the piston through the bottom of the sleeve.
In the picture below the notch in the sleeve faces directly away from the camera. Note that the large hole in the piston must NOT face the exhaust port. Some engines do not use pistons with a hole, however remember this example engine is the 15FE - this is the type of piston it must use.
Carefully insert the sleeve (with piston installed) partially into the engine case. Make sure the notch in the sleeve faces the rear of the engine case. Remember, the "front" of the engine is always the side with the flywheel, clutch, etc., and the "rear" of the engine is where the pullstarter or backplate sit.
