Skylark L4-144 2.4L DOHC VIN T SFI (1997)
Balance Shaft: Description and Operation
There are two shafts supported on bearing insets in a cast split housing. The balance shaft assembly is mounted to the bottom of the engine block. The
longer shaft is chain driven by a sprocket on the crankshaft. The shorter shaft is driven by the longer shaft. The shafts rotate at twice the engine speed.
The shorter shaft drives the oil pump which is attached to the balance shaft housing. The housing assembly contains the oil pump pick-up and screen on
the bottom of the assembly.