Mopar 4429709 Ring-Piston Pin

You can Select Your Vehicle to check if 4429709 fits your vehicle.

Before installing the new piston rings, check the ring end gaps. Lay out the piston/connecting rod assemblies and the new ring sets to match the rings with the same piston and cylinder during the end gap measurement and engine assembly. Insert the top ring into the first cylinder and square it up with the cylinder walls using the piston, ensuring the ring is at the bottom of the cylinder just below the lower limit of the ring travel. To measure the end gap, slip a feeler gauge between the ends of the ring and compare the measurement to the specifications. If the gap is larger or smaller than specified, double-check to ensure the correct rings are being used. If the gap is too small, it must be enlarged to prevent the ring ends from contacting each other during engine operation, which can cause serious damage. Increase the end gap by carefully filing the ring ends with a fine file, ensuring to file only from the outside in. Excess end gap is not critical unless it exceeds 0.040-inch. Repeat the procedure for each ring in the first cylinder and for each ring in the remaining cylinders, keeping rings, pistons, and cylinders matched. Once the ring end gaps have been checked and corrected, install the rings on the pistons, starting with the oil control ring, which consists of three components. Slip the spacer expander into the groove, then install the upper side rail without using a piston ring tool to avoid damage. Place one end of the side rail into the groove and slide a finger around the piston while pushing the rail into the groove, then install the lower side rail in the same manner. After installing the three oil ring components, ensure both the upper and lower side rails can turn smoothly in the ring groove. Next, install the middle ring using a piston ring installation tool, ensuring the mark faces up, and do not expand the ring more than necessary. Finally, install the top ring in the same manner and repeat the procedure for the remaining pistons and rings.