Table 2-1. Engine Troubleshooting - Continued.
TEST OR INSPECTION
LOW OIL PRESSURE - Continued.
Remove oil sump per paragraph 2.17 and pressurize engine water jacket to 20 psi (138 kPa). Seal
water pump outlet and pressurize through thermostat housing.
If leakage is present at bottom end of cylinder sleeves (between sleeve and block) replace
cylinder sleeves per paragraph 2.17. If leakage is present at inside of sleeve bore, check
cylinder head gasket. If gasket is damaged, replace per paragraph 2.15. If gasket is not
damaged, replace cylinder sleeve per paragraph 2.17.
Remove oil sump per paragraph 2.17. Check operation of oil pressure relief valve.
Replace/repair oil pressure relief valve if stuck open or has a broken relief valve spring per
Remove oil sump per paragraph 2.17. Check oil pump strainer tube for blockage or leaks.
Replace per paragraph 2.17 or clear blocked oil pump strainer tube.