Engine Oil Cooler: Inspection

INSPECT OIL COOLER ASSEMBLY
1. Check the oil cooler for damage or clogging. If necessary, replace the oil cooler assembly.
  
  Fig 1: Inspecting Oil Cooler Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT OIL PUMP RELIEF VALVE
1. Coat the relief valve with engine oil.
2. Check that the relief valve falls smoothly into the valve hole by its own weight.
  If the relief valve does not fall smoothly, replace it. If necessary, replace the oil filter bracket.
  
  Fig 2: Checking Relief Valve Falls Smoothly Into Valve
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002