Voyager L4-153 2.5L SOHC (1990)
Crankshaft: Description and Operation
A nodular cast iron crankshaft is used in the 2.5L engine. This crankshaft has 5 main bearings, with number 3 flanged to control thrust. The 60 mm
(2.362 in.) diameter main and 50 mm (1.968 in.) diameter crank pin journals all have undercut radiused fillets that are deep rolled for added strength. To
optimize bearing loading, 4 counter-weights are used. Hydrodynamic seals (installed in diecast aluminum retainers) provide end sealing where the
crankshaft exits the block. Anaerobic gasket material is uaed for retainer-to-block sealing. A vibration damper is used. A sintered iron timing belt
sprocket is mounted on the crankshaft nose. This sprocket provides motive power; via timing belt to the camshaft and intermediate shaft sprockets (also
sintered iron) providing timed valve, distributor, and oil pump actuation.
