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6. If no leaks are detected, turn off the air supply. Remove the air hose, all plugs, and caps. Install the vent hose and proceed to next step. 7. Clean the oil off the suspect oil leak area using a suitable solvent. Drive the vehicle at various speeds approx- imately 24 km (15 miles). Inspect the engine for signs of an oil leak by using a black light. INSPECTION FOR REAR SEAL AREA LEAKS Since it is sometimes difficult to determine the source of an oil leak in the radial seal area of the engine, a more If the leakage occurs at the crankshaft radial oil seal area: 1. Disconnect the battery. 2. Raise the vehicle. 3. Remove torque converter or clutch housing cover and inspect rear of block for evidence of oil. Use a black light to check for the oil leak. If a leak is present in this area, remove transmission for further inspection. a. Circular spray pattern generally indicates seal leakage or crankshaft damage. b. Where leakage tends to run straight down, possible causes are a porous block, oil gallery cup plug, bedplate to cylinder block mating surfaces and seal bore. See proper repair procedures for these items. 4. If no leaks are detected, pressurize the crankcase as previously described. CAUTION: Do not exceed 20.6 kPa (3 psi). 5. If the leak is not detected, very slowly turn the crankshaft and watch for leakage. If a leak is detected between the crankshaft and seal while slowly turning the crankshaft, it is possible the crankshaft seal surface is damaged. CAUTION: Use extreme caution when crankshaft polishing is necessary to remove minor nicks and 6. For bubbles that remain steady with shaft rotation, no further inspection can be done until disassembled. 7. After the oil leak root cause and appropriate corrective action have been identified, replace component(s) as necessary. ZH ENGINE - 3.2L SERVICE INFORMATION 9 - 789 |