Only the K-series and T-series engines covered by this information utilize a timing chain (instead of a belt). The timing chain is run wet (oiled) and therefore the timing cover is also the engine front cover in the sense that is seals the front of the crankcase. On the 1C-L diesel engine and on all A-series engines, a timing belt is utilized. When a timing belt is used it is normally run dry, therefore the timing cover is NOT the seal for the front of the engine crankcase. On engines utilizing a timing belt, an oil pump body/front cover is mounted behind the timing belt and is used to seal the front of the crankcase.
See Figures 1, 2, 3 and 4
- Remove the engine timing cover, as detailed earlier in this section.
- For the 1C-L diesel engine and all A-series engines, remove the timing belt, then remove the oil pump body assembly. For details, please refer to the procedures located in this section.
- Inspect the oil seal for signs of wear, leakage, or damage.
- If worn, pry the oil seal out, using a suitable flat bladed tool. Remove it toward the front of the cover.
Once the oil seal has been removed, it MUST be replaced with a new one
- Use a socket, pipe, or block of wood and a hammer, carefully drive the oil seal into place. Again, work from the front of the cover. Make sure whatever is used for a driver tool is approximately the same diameter as the seal and the surface which contacts the seal is smooth to prevent damaging the seal's lips.
- On timing belt equipped engines, install the oil pump body assembly and the timing belt.
- Install the engine timing cover.