One problem related to oil pump has been reported for the 2002 Mitsubishi Montero Sport. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Mitsubishi Montero Sport based on all problems reported for the 2002 Montero Sport.
Hard knocking noise and oil lamp on immediately after oil has been changed. Checked oil, dip stick showed no oil in engine. Took back to mechanic who performed an oil pump pressure test, diagnosed with no oil pressure recommended take to dealership. Dealership claims problem due to lack of oil changes, have documents proving scheduled maintenance performed as recommended. Vehicle is at the dealership with $4000 worth of work needed to repair sludge in engine that is the result of something other than faulty maintenance. Only solution from dealership is to get a new vehicle (from them of course).