Buick 12591720 Sensor Assembly, Camshaft Position

For V6 models,Disconnect the CMP sensor connector. Remove the water pump, then the CMP sensor and its old o-ring. During installation, use a new lubricated o-ring and securely tighten the sensor bolt. For V8 models: Elevate the vehicle's front and secure on jackstands. Disconnect the CMP sensor harness and remove the sensor and o-ring. If the o-ring is damaged, replace it. Lubricate the o-ring with clean engine oil. Reinstall by reversing the removal steps, ensuring tight mounting bolts.

Disconnect the cable from the negative battery terminal. For V6 engines, note that there are four CMP sensors, one for the intake camshaft and one for the exhaust on each cylinder head. Remove the engine cover. If removing the CMP sensors from the left side (Bank 2), take out the power steering reservoir. Disconnect the CMP sensor electrical connector, then remove the CMP sensor mounting bolt and the CMP sensor itself. Remove the CMP sensor O-ring and inspect its condition; if cracked, torn, or otherwise deteriorated, replace it. Lubricate the sensor O-ring with clean engine oil, and installation is the reverse of removal. For V8 engines, the sensor is located at the front of the engine, mounted on the timing chain cover. For L99 (VIN J) models, remove the water pump, then the alternator, followed by the alternator bracket mounting bolts and bracket. Remove the sensor and jumper harness assembly mounting bolts from the timing chain cover, disconnect the CMP sensor electrical connector and magnet connector, then remove the CMP sensor mounting bolt and the CMP sensor. Inspect the CMP sensor O-ring and replace it if necessary, lubricating it with clean engine oil before installation. For LS3 (VIN W) and LSA (VIN P) models, remove the drivebelts and idler pulley, then the alternator, followed by the bracket mounting bolts and bracket. Remove the sensor and jumper harness assembly mounting bolts from the timing chain cover, disconnect the engine harness electrical connector from the jumper harness connector, and then disconnect the sensor from the jumper harness connector. Inspect the CMP sensor O-ring and replace it if necessary, lubricating it with clean engine oil before installation.

For V6 models,Disconnect the CMP sensor connector. Remove the water pump, then the CMP sensor and its old o-ring. During installation, use a new lubricated o-ring and securely tighten the sensor bolt. For V8 models: Elevate the vehicle's front and secure on jackstands. Disconnect the CMP sensor harness and remove the sensor and o-ring. If the o-ring is damaged, replace it. Lubricate the o-ring with clean engine oil. Reinstall by reversing the removal steps, ensuring tight mounting bolts.

For V6 models,Disconnect the CMP sensor connector. Remove the water pump, then the CMP sensor and its old o-ring. During installation, use a new lubricated o-ring and securely tighten the sensor bolt. For V8 models: Elevate the vehicle's front and secure on jackstands. Disconnect the CMP sensor harness and remove the sensor and o-ring. If the o-ring is damaged, replace it. Lubricate the o-ring with clean engine oil. Reinstall by reversing the removal steps, ensuring tight mounting bolts.

For V6 models,Disconnect the CMP sensor connector. Remove the water pump, then the CMP sensor and its old o-ring. During installation, use a new lubricated o-ring and securely tighten the sensor bolt. For V8 models: Elevate the vehicle's front and secure on jackstands. Disconnect the CMP sensor harness and remove the sensor and o-ring. If the o-ring is damaged, replace it. Lubricate the o-ring with clean engine oil. Reinstall by reversing the removal steps, ensuring tight mounting bolts.

The sensor is located at the rear of the cylinder block, between the two cylinder banks.

The exhaust CMP sensor produces a signal pulse four times every exhaust camshaft revolution in a four-cylinder engine or five times in a five-cylinder engine.

Disconnect the cable from the negative battery terminal, then remove the intake manifold.

The initial steps for disconnecting the CMP sensor include:Disconnecting the cable from the negative battery terminal.Removing the engine cover.

The replacement process for V8 models is similar to that of six-cylinder models. It involves disconnecting the electrical connector from the sensor, removing the camshaft position sensor mounting bolt, and withdrawing the sensor from the engine block.

The exhaust CMP sensor produces a signal pulse four times every exhaust camshaft revolution in a four-cylinder engine or five times in a five-cylinder engine.

During installation of the CMP sensor on a V8 model, you should lubricate the new o-ring with clean engine oil and tighten the mounting bolts securely.

During installation of the CMP sensor on a V8 model, you should lubricate the new o-ring with clean engine oil and tighten the mounting bolts securely.