OEM Chrysler Pacifica Piston

Chrysler Pacifica Piston Parts and Q&A

• Piston
  R4593589AB
  Q: How Are Pistons Installed into the Bore with Connecting Rod Assemblies on Chrysler Pacifica?

  A:

  Be certain when fitting the pistons and connecting rods into the engine that rings 2 and 5 are at different heights, both displaced from alignment with oil ring gap 1 and 4. Check that the arrow on top of the piston is pointing toward the engine's front, if it has one. Use clean engine oil to lubricate the piston and rings, then set a ring compressor over them and tighten it so the rings do not move. Lay the upper bearing on the connecting rod and oil it. Connecting rod protectors should be installed with tool #8189. The top of each piston bears an arrow; you should set the pistons so that the arrows face the front of the engine on both sides, allowing the connecting rod oil squirt hole to be beside the major thrust (right) side. Place the connecting rod on the Crankshaft and turn the crankshaft so that the journal of the connecting rod is lined up in the cylinder bore, then carefully tap down the head of the piston with a hammer handle to push the connecting rod and piston into the bore. Place the lower bearing shell and the right size of connecting rod cap, then secure each rod bolt at 7 Nm, add another 21 Nm and end with each bolt turned 90° for the required tightness. Repeat for every piston and connecting rod fitment. After the valve covers, set in the cylinder heads and Oil Pan and put the correct amount of oil in the crankcase. Connect the negative Battery Cable after this.
• Piston
  4666129AA
  Q: How to Remove and Replace a Piston and Connecting Rod on Chrysler Pacifica?

  A:

  So that you can take out the piston and connecting rod, first detach the battery's negative cable and afterward, remove the cylinder heads and the Oil Pan. Should it be required, remove the top ridge using a proper ridge reamer prior to removing the pistons, to keep the tops of the pistons protected during this stage. You should extract the piston and connecting rod from each cylinder, so turn the Crankshaft to center the connecting rods. Check the connecting rods and their caps for the identities of the cylinders; paint or scribe them if you spot a need. Taking off the cap on the connecting rod, then place connectors over the bolts or use tool #8189 to position the cracked connecting rod. Take each piston and connecting rod assembly out of the cylinder bore without damaging the crankshaft journals and then set the bearing cap onto the removed rod.