Lubrication and Cooling Systems Diagnosis and Repair1. Diagnose engine lubrication system problems; perform oil pressuretests; perform engine oil dye test; determine needed action2. Disassemble and inspect oil pump(includes gears, rotors, housing,pick-up assembly and variable displacement components); measure oilpump clearance; inspect pressure relief devices, control systems, andpump drive(includes belt/chain drive); determine needed action3. Inspect, flush, and test internal and external engine oil coolersdetermine needed action4. Change engine oil and filter(s)using proper type, viscosity, and ratingper manufacturer's specifications5. Perform cooling system pressure tests; perform coolant dye testdetermine needed action