2D-24 Chapter 2 Part D General engine overhaul procedures
21.3 When checking piston ring end gap, the ring must be
square in the cylinder bore (this is done by pushing the ring down
with the top of a piston as shown)
lowspeedoperation (lugging theengine) putsvery high loadson bearings,
which tends to squeeze out the oil film. These loads cause the bearings to
flex, which produces fine cracks in the bearing face (fatigue failure). Even-
tually the bearing material will loosen in pieces and tear away from the
steel backing. Shorttripdriving leads to corrosion of bearings because in-
sufficient engine heat is produced to drive off the condensed water and
corrosive gases. These products collect in the engine oil, forming acid and
sludge. As the oil is carried to the engine bearings, the acid attacks and
corrodes the bearing material.
7 Incorrect bearing installation during engine assembly will lead to
bearing failure as well. Tight fitting bearings leave insufficient oil clearance
and will result in oil starvation. Dirt or foreign particles trapped behind a
bearing insert result in high spots on the bearing which lead to failure.
20 Engine overhaul - reassembly sequence
1 Before beginning engine reassembly, make sure you have all the nec-
essary new parts, gaskets and seals as well as the following items on
hand:
2
Common hand tools
Torque wrench (l/2-inch drive)
Piston ring installation tool
Piston ring compressor
Vibration damper installation tool
Short lengths of rubber or plastic hose to fit over connecting rod bolts
Plastigage
Feeler gauges
Fine-tooth file
New engine oil
Engine assembly lube or moly-base grease
Gasket sealant
Thread locking compound
In order to save time and avoid problems, engine reassembly must be
done in the following general order:
2.6L engine
Crankshaft and main bearings
Rear main oil seal housing
Piston/connecting rod assemblies
Oil pump
Oil pan
Timing chain housing
Timing chain and sprockets
Silent shaft chain and sprockets
Intake and exhaust manifolds
Cylinder head, camshaft and rocker arms
21.4 With the ring square In the cylinder, measure the end gap
with a feeler gauge
21.5 If the end gap is too small, clamp a file In a vtse and file the
ring ends (from the outside in only) to enlarge the gap slightly
Valve cover
FlywheeUdriveplate
2.OL and 2.4L engines
Crankshaft and main bearings
Rear main oil seal housing
Piston/connecting rod assemblies
Oil pump
Timing be/t and sprockets
Timing belt cover
Oil pan
Cylinder head, camshaft and rocker arms
Intake/exhaust manifolds
Valve cover
Engine rear plate (if equipped)
Flywheel/driveplate
3.OL V6 engine
Crankshaft and main bearings
Rear main oil seal housing
Piston/connecting rod assemblies
Oil pump
Oil pan
Timing belt cover
Timing belt and sprockets
Cylinder heads, camshafts and rocker arms
Intake and exhaust manifolds
Valve covers
FlywheeNdriveplate
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