Buick 12591689 Sprocket, Camshaft

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To remove the timing chain cover, start by disconnecting the cable from the negative terminal of the battery and draining the cooling system. Then, remove the cooling fan, water pump, drivebelt pulley, and vibration damper. Next, remove the crankshaft position sensor and the wiring harness nut. After that, remove the oil pan and disconnect the wiring harness clips from the front cover. Remove the crankshaft position sensor and the camshaft position sensor with its jumper wiring harness. Then, remove the cover bolts and separate the timing chain cover from the block. Remove the crankshaft position sensor reluctor ring and measure the timing chain free play. If necessary, replace the chain and sprockets. Make sure the sprocket timing marks are aligned and release the timing chain tensioner. To install the timing chain cover, clean the engine block sealing surfaces and align the keyway in the crankshaft sprocket. Press the sprocket onto the crankshaft and align the balance shaft gears. Position the crankshaft and loop the chain over the camshaft sprocket. Apply thread locking compound to the camshaft sprocket bolt threads and tighten them. Install the crankshaft position sensor reluctor ring and apply RTV sealant to the engine block sealing surface. Position the new front cover and oil seal assembly, then tighten the cover retaining bolts. Finally, install the oil pan, vibration damper, and crankshaft position sensor.

To install the timing chain cover, you need to follow these steps:1. Clean the engine block sealing surfaces.2. Align the keyway in the crankshaft sprocket.3. Press the sprocket onto the crankshaft.4. Align the balance shaft gears.5. Position the crankshaft and loop the chain over the camshaft sprocket.6. Apply thread locking compound to the camshaft sprocket bolt threads and tighten them.7. Install the crankshaft position sensor reluctor ring.8. Apply RTV sealant to the engine block sealing surface.9. Position the new front cover and oil seal assembly.10. Tighten the cover retaining bolts.11. Install the oil pan.12. Install the vibration damper.13. Install the crankshaft position sensor.