Pistons Ans Connecting Rods Assembly Installation - Jeep 1987 Wrangler Workshop Manual

ENGINES
4.2 LITER (258 CID) SIX-CYLINDER ENGINE
R e m o v e the connecting rod and piston
assemblies through the top of the cylinder bores.
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PISTONS AND CONNECTING RODS ASSEMBLY
INSTALLATION
Clean the cylinder bores thoroughly. Apply a
light film of clean engine oil to the bores with a
clean, lint-free cloth.
Install replacement piston rings on the pistons, if
necessary. Refer to the MOT. 4.2L manual for
the procedure.
Lubricate the pistons and rings with clean
engine oil.
CAUTION: Ensure that the connecting rod bolts
do not scratch the crankshaft journals or cylinder
walls. Short pieces of rubber hose, slipped over
the connecting rod bolts, will provide protection
during installation.
Use piston ring compressor tool J-5601 to install
the connecting rod and piston assemblies from
the top of the cylinder block. Ensure the arrow
(1) on the piston top points to the front of the
engine.
NOTE: Verify that the oil squirt holes in the rods
face the camshaft and that the arrows on the
pistons face the front of the engine.
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