Oil pump — removal and installation
Note: On 2010 and later models, the oil pump is not serviceable separately from the timing chain cover. If the oil pump is defective, the timing chain cover and pump must be replaced as a unit (see Timing chain and sprockets — removal, inspection and installation).
Removal
1. Remove the timing chain and the crank- shaft sprocket (see Timing chain and sprockets — removal, inspection and installation).
2. Remove the oil pump drive chain and sprockets (see illustrations).
14.2a Rotate the engine 90-degrees counterclockwise (from TDC) and set the crankshaft key to the left horizontal position (A), then remove the oil pump drive chain tensioner and bolt (B)
14.2b Using a screwdriver to lock the lower gear in place, loosen the retaining bolt and remove the drive chain and lower gear from the engine
3. Remove the three bolts and detach the oil pump body from the engine (see illustration). You may have to pry carefully between the front of the block and the pump body with a screwdriver to remove it.
14.3 Oil pump mounting bolts
4. Use a scraper to remove all traces of sealant and old gasket material from the pump body and engine block, then clean the mating surfaces with brake system cleaner.
5. Inspect the oil pump and chain for wear and damage. If the oil pump shows signs of wear or you’re in doubt about its condition it is simply best to replace it. Oil pump drive chain stretch is measured by checking the length of the chain between 4 links (8 pins) at 3 or more places (selected randomly) around the chain — if chain stretch exceeds the specifications between any 4 links, the chain must be replaced (see illustration). Wrap the chain around each of the oil pump drive sprockets and measure the diameter of the sprockets across the chain rollers (see illustration 6.27b) — if the measurement is less than the minimum sprocket diameter, the chain and the sprockets must be replaced. Oil pump chain guide wear is measured from the top of the chain contact surface to the bottom of the wear grooves (see illustration 6.28). Also check the oil jet for blockage (see illustration).
14.5a Oil pump drive chain stretch is measured by checking the length of the chain between 4 links (8 pins) at 3 or more places (selected randomly) around the chain — if chain stretch exceeds the specifications between any 4 links, the chain must be replaced
14.5b Check that the oil jet is free of debris — a blockage here will lead to an excessively worn timing chain, oil pump drive chain and guides
Installation
6. Lubricate the pump cavity by pouring a small amount of clean engine oil into the inlet side of the oil pump and turning the drive gear shaft.
7. Position the oil pump and a new gasket against the block and install the mounting bolts.
8. Tighten the bolts to the torque listed in this Chapter’s Specifications in several steps. Follow a crisscross pattern to avoid warping the body.
9. Install the drive chain and sprockets so that the colored links on the chain align with the alignment marks on the drive gears (see illustration).
14.9 Install the oil pump drive chain with the colored links aligned with the marks on the sprockets
10. Tighten the lower drive sprocket retaining bolt to the torque listed in this Chapter’s Specifications.
11. Reinstall the remaining parts in the reverse order of removal.
12. Add oil to the proper level, start the engine and check for oil pressure and leaks.