Lubricating Oil Pan Transfer Tube (07-02) Section 7 - Lubricating Oil System - Group 07 M11 Page 7-6 Visually inspect the threaded holes for damage. Dam- aged threads can be chased with the following taps. Oil Pan Threaded Holes Thread Location Tap Size Temperature Gauge 3/8 in. NPTF Oil Sump Heater 1-18 NS-3B Oil Drain 1 in. NPTF NOTE: If the oil pan is cracked or damaged, or if the threaded holes cannot be repaired with the taps listed above, the oil pan must be replaced. Lubricating Oil Pan Transfer Tube - Cleaning and Inspection for Reuse (7-02) Cleaning Three styles of transfer tubes are used. Front sump pans use the straight transfer tube or the block mounted suc- tion tube.
Rear sump pans use a shaped tube. Remove the o-rings (1) from the oil transfer tube. The snap ring (2) is used to locate the straight style oil transfer tube correctly between the oil pan and the cyl- inder block during assembly. Use solvent to clean the oil transfer tube. Dry with com- pressed air. Inspection Visually inspect the oil transfer tube for cracks or damage. Visually inspect the o-ring grooves for cavitation or dam- age. If cracks, damage or cavitation is found, the oil transfer tube must be replaced.