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Engine AJ-V8/5HP24
9
Connecting Rods and Pistons
The connecting rods are manufactured in sinter
forged steel. The bearing caps are produced by
fracturing the opposing sides of the connecting rod at
the bearing horizontal center-line. As well as being
easier to manufacture, when re-assembled the
fractured surfaces interlock to form a strong
seamless joint. The cylinder position is etched on
adjoining sides of the joint to identify matching
connecting rods and bearing caps. The connecting
rod bearings are lead/bronze split plain bearings.
The pistons are of the open ended skirt design with
flat upper surfaces to reduce heat absorbtion. Three
piston rings, two compression and one oil control, are
installed on each piston. Each piston is installed on a
wrist pin located in a lead/bronze bushing in the
connecting rod.
Sump
The sump consists of an aluminum alloy structural
sump bolted to the bedplate, and a pressed steel oil
pan bolted to the structural sump. A windage tray
attached to the top of the structural sump isolates
the oil pan from the disturbed air produced by the
rotation of the crankshaft, to prevent oil aeration and
improve oil drainage. A rubber plug at the rear of the
structural sump seals the port that provides access to
the torque converter securing bolts. The engine oil
drain plug is located at the front right corner of the oil
pan.
A silicon rubber in-groove gasket seals the joint
between the oil pan and the structural sump; a bead
of sealant seals the joint between the structural
sump and the bedplate.
CONNECTING ROD AND PISTON
303-014
SEALANT TRACK ON STRUCTURAL SUMP
303-021