OEM Chrysler 300M Piston

Chrysler 300M Piston Parts and Q&A

• Piston
  R5010335AB
  Q: How to Remove and Install a Piston in an Engine on Chrysler 300M?

  A:

  The first thing to do is remove both the cylinder heads and the Oil Pan. Apply a reliable ridge reamer to level the upper ridge in the piston bores and remember to cover the pistons' tops at all times. You should remove the pistons and connecting rods from the cylinder's upper area, making sure that the Crankshaft moves so that each connecting rod is centered in its bore. For each cylinder, examine the connecting rods and caps to identify them and mark them if that's needed. Unscrew the connecting rod cap and place protectors on the connecting rod bolts before you remove each piston and rod assembly out of the engine cylinders, always being careful not to damage the crankshaft journals. After you remove the bearing cap, replace it on the mating rod. While installing, put the piston rings in place first, looking out for possible necking in the connecting rod bearing cap bolts; change any of them that look damaged. Make sure the compression ring gaps are not in line with the oil ring rail gap. Submerge the piston and rings in clean engine oil, use the ring compressor over the piston head to position the rings and attach it with a special wrench. Once connectors for connecting rod bolts are fitted, rotate the engine crankshaft to have the center of the connecting rod journal in the cylinder and lead the rod and piston into place without moving piston assemblies from cylinder to cylinder. The piston's arrow has to point toward where the engine faces and the squirt hole on the connecting rod should face further down the cylinder bore where the piston's greatest thrust occurs. Glide the journal of the connecting rod into place, then with the hammer handle, tap the piston down into the cylinder bore. After installing the rod caps, set nuts over the clean and greased rod bolts and tighten them at 54 Nm (40 ft. lbs.) plus 1/4 turn. Reinstate both the cylinder head(s) and the oil pan at the end.