Pistins Ans Connecting Rods Installation; Main Bearings Caps And Brace - Jeep 200 Cherokee Service Manual

XJ
REMOVAL AND INSTALLATION (Continued)
ridge from the top end of the cylinder walls. Use a
protective cloth to collect the cuttings.
(6) Raise the vehicle.
(7) Drain the engine oil.
(8) Remove the oil pan and gasket.
(9) Remove main bearing cap brace (Fig. 76).
Fig. 76 Main Bearings Caps and Brace
1 – BLOCK
2 – MAIN BEARING CAP BRACE
(10) Remove the connecting rod bearing caps and
inserts. Mark the caps and rods with the cylinder
bore location. The connecting rods and caps are
stamped with a two letter combination (Fig. 77).
Fig. 77 Stamped Connecting Rods and Caps
1 – CONNECTING ROD CAP
2 – CONNECTING ROD
(11) Lower the vehicle until it is about 2 feet from
the floor.
CAUTION: Ensure that the connecting rod bolts DO
NOT scratch the crankshaft journals or cylinder
walls. Short pieces of rubber hose, slipped over the
rod bolts will provide protection during removal.
(12) Have an assistant push the piston and con-
necting rod assemblies up and through the top of the
cylinder bores (Fig. 78).
Fig. 78 Removal of Connecting Rod and Piston
Assembly
1 – PISTON
2 – CONNECTING ROD
3 – BLOCK
INSTALLATION
(1) Clean the cylinder bores thoroughly. Apply a
light film of clean engine oil to the bores with a clean
lint-free cloth.
(2) Install the piston rings on the pistons if
removed.
(3) Lubricate the piston and rings with clean
engine oil.
CAUTION: Ensure that 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.
4.0L ENGINE 9 - 109