Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSJEEP1994CHEROKEE COUNTRY, 4D UTILITY, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALMECHANICAL4.0L 6-CYL - VIN [S]OVERHAULCYLINDER BLOCK ASSEMBLYPISTON & ROD ASSEMBLY
1994 Jeep Cherokee Country, 4D Utility, RWD
Piston & Rod Assembly
1994 Jeep Cherokee Country, 4D Utility, RWDSECTION Piston & Rod Assembly
- Position piston on support. See Fig 1. Press piston pin from piston. Discard pin. Piston pin cannot be reused after removal. Inspect piston pin bore in connecting rod for nicks and burrs, and remove as necessary. Clean and dry piston pin bore and NEW piston pin.
- Clean piston pin bore and replacement piston pin. Piston and piston pin must be at room temperature when measuring fit. Piston pin should fall through piston at room temperature. If pin jams in pin bore, replace piston.
- Ensure arrow on piston crown is pointing up. Insert piston pin through piston pin bore and into connecting rod pin bore. Assemble connecting rod and piston so oil squirt hole faces camshaft and arrow on piston points to front of engine when installed.
- Press pin through rod and piston until pilot indexes with mark on support. Pin should be centered in rod. Piston pin installation requires approximately 2000 lbs. (900 kg) of force. Replace connecting rod if noticeably less force is required, or if rod moves on pin.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.