Grand Cherokee 2WD V6-3.7L (2008)
Connecting Rod: Removal and Replacement
Piston and Connecting Rod - Removal
1. Disconnect the negative cable from battery.
2. Remove the following components:
Oil pan and gasket/windage tray See: Engine Lubrication/Oil Pan/Service and Repair/Removal and Replacement/Engine Oil Pan - Removal.
Cylinder head(s) See: Cylinder Head Assembly/Service and Repair/Removal and Replacement/Cylinder Head - Removal and See: Cylinder
Head Assembly/Service and Repair/Removal and Replacement/Cylinder Head - Removal.
3. If necessary, remove top ridge of cylinder bores with a reliable ridge reamer before removing pistons from cylinder block. Be sure to keep tops of
pistons covered during this operation. Pistons and connecting rods must be removed from top of cylinder block. When removing piston and
connecting rod assemblies from the engine, rotate crankshaft so the each connecting rod is centered in cylinder bore.
CAUTION: DO NOT use a number stamp or a punch to mark connecting rods or caps, as damage to connecting rods could occur
NOTE: Connecting rods and bearing caps are not interchangeable and should be marked before removing to ensure correct reassembly.
4. Mark connecting rod and bearing cap positions using a permanent ink marker or scribe tool.
CAUTION: Care must be taken not to damage the fractured rod and cap joint face surfaces, as engine damage may occur.
5. Remove connecting rod cap. Install Connecting Rod Guides l 8507 onto the connecting rod being removed. Remove piston from cylinder bore.
Repeat this procedure for each piston being removed.
CAUTION: Care must be taken not to nick crankshaft journals, as engine damage may occur
6. Immediately after piston and connecting rod removal, install bearing cap on the mating connecting rod to prevent damage to the fractured cap and
Piston and Connecting Rod - Installation
1. Before installing piston and connecting rod assemblies into the bore, install the piston rings.