Question 1

How to Remove and Replace a Piston in an Engine on Jeep Cherokee?

Accepted Answer

Before taking out and replacing the piston, pull off the engine cylinder head cover, then the rocker arms, bridges and pivots and after that, the push rods and cylinder head. Place each piston near the bottom of the stroke and remove the ridge from the top of the cylinder with a ridge reamer, dropping the cuttings into a cloth. A boost of the vehicle will allow you to empty the engine oil before you remove the oil pan and gasket. After that, take off the main bearing cap brace, the connecting rod bearing caps and their inserts, mark each rod and cap with the cylinder bore location, since the connecting rods and caps are stamped with a two-letter combination. Place it so that the vehicle sits about two feet above the ground, shielding any bolts from the bumps with short hoses wrapped around the crankshaft and cylinder. Instruct your assistant to start the piston and connecting rod assemblies with a thrust up and into the top of the cylinders. Once installation begins, clean the cylinders throughly and spread a light coat of clean lubricating oil using a clean cloth. Remove the connecting rods and install the piston rings on the pistons, lubricating both the pistons and the rings with clean engine oil, so that the connecting rod bolts will not damage either the crankshaft journals or cylinder walls. Use a piston ring compressor to put the connecting rod and piston assemblies into the cylinder bores using the arrow on the piston top as your guide, pointing to the front. Raise the vehicle again so you can install each bearing insert in its suitable journal and get the correct clearance. You can see a color on the cheek or counterweight of the rod journal toward the flange end which tells you how big the journal is and what it is made of. When needed, an upper and lower insert of diverse sizes can be paired and using a 0.025 mm (0.001 inch) undersized insert with a regular one can cut clearance by 0.013 mm (0.0005 inch). Do not mix up the bearing caps and connecting rods, because the cylinder number on each is stamped at a point near the oil hole on the same side of the blocks. Reinstall the connecting rod bearing caps and inserts where you took them out and confirm that the oil holes on the rods wait the camshaft and that the arrows on the pistons are toward the front of the engine. First, install the bearing cap brace and tighten the bolts to 47 Nm (35 ft. lbs.) and then put on the oil pan with its gasket. Drop the vehicle to a lower height, fit the engine cylinder head, the push rods, the rocker arms, bridges, pivots and the engine cylinder head cover, then add engine oil into the crankcase.

Question 2

How to Install and Replace a Piston and Connecting Rod on Jeep Wrangler?

Accepted Answer

Be sure that ring gaps 2 and 5 are parallel and not together with any of the oil ring rail gaps before setting in the pistons and connecting rod assemblies into the bore. Make sure that the arrow on top of the piston points toward the engine front, if it is there. Cleanly lubricate both the piston and rings with engine oil, after which place a ring compressor over the assembly and secure it carefully to maintain the correct ring alignment. Put the upper bearing on the end of the connecting rod and polish it with oil. Use special tool #8189 to secure connecting rod protectors on the connecting rod. Each piston has an arrow on top; install the piston so that the arrow points in front of the engine and the oil squirt hole hits the major thrust (right) side of the block for both cylinder banks. Turn the crankshaft until the connecting rod journal sits in the center of the cylinder bore, then, using a hammer handle, guide the connecting rod along the journal and press the piston into the cylinder bore. Put the lower bearing shell and connecting rod cap in place, install the bolts, tighten them to 7 Nm and follow with a 21 Nm tightening and 90° turn each bolt for the final setting. Do this procedure for every piston and connecting rod. After that, put in the cylinder heads and oil pan, add the correct amount of oil to the crankcase and connect the negative cable to the battery.

OEM Jeep Piston

60 Pistons found

Jeep Piston Part Number: 5191341AA

Jeep Piston Part Number: 68210587AA

Jeep Piston Part Number: 4666129AA

Jeep Connecting Rod Part Number: 68090673AA

Jeep Piston Part Number: 5048639AA

Jeep Piston Part Number: 68147230AA

Jeep Vibration Damper Part Number: 5142303AB

Jeep Connecting Rod Part Number: 53022257AE

Jeep Piston Part Number: 5179423AC

Jeep Piston Part Number: 5142544AB

Jeep Oil Pump Part Number: 5191337AA

Jeep Piston Part Number: 5086011AB

Jeep Piston Part Number: 5037491AB

Jeep Piston Part Number: 5086010AB

Jeep Piston Part Number: 53021539AD

Jeep Piston Part Number: 53021538AD

Jeep Piston Part Number: 68031890AD

Jeep Piston Part Number: 68031891AD

Jeep Connecting Rod Part Number: 68090672AA

Jeep Piston Part Number: 68233351AA

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