Is setting the camshaft timing necessary whenever the camshaft drive system has been disturbed on Cadillac STS?

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Engineers need to reset Camshaft timing whenever the Camshaft drive system creates misalignment between any chains and sprockets. Proper timing exists between Crankshaft and camshafts when the crank sprocket and intermediate shaft sprocket timing marks line up while all four Camshaft position actuator timing marks point directly (90°) to the cylinder head deck surface at their peak rotation. The access point to the timing chains requires removal of the left Camshaft actuator housing and right Camshaft actuator housing together with engine front cover, engine Oil Pump, right secondary Camshaft drive chain, and left secondary Camshaft drive chain. It is essential to time the primary gears and chain first before using the Crankshaft socket (J 39946) for left or right secondary Camshaft timing adjustment. Turn the Crankshaft so the primary timing gear reaches its upper position alongside the 1 o'clock position of the keyway while the intermediate timing mark points toward the lowest position directly adjacent to the crank gear timing mark. Timing the primary timing gears ensures that the #1 cylinder piston is at top dead center (TDC) beginning its power stroke event. The left bank 2 secondary Timing Chain contains three black links that provide timing support for the bank 2 Camshaft position actuators to the intermediate sprocket. The black link must match the bank 2 exhaust actuator timing mark, bank 2 intake actuator timing mark, and the intermediate sprocket. When attaching the secondary Timing Chain to the intermediate sprocket position the sprocket lb timing mark opposite the Timing Chain black link. Place the li timing mark of the front intake actuator directly on the black timing link before you install the actuator on the Camshaft while maintaining the 90-degree perpendicular alignment to the cylinder head deck surface. Screw in the oil control valve loosely before tightening it to 120 nm (89 ft. Lbs.). Leverage the timing mark on the front of the exhaust actuator which is marked le to line up the actuator at 90 degrees to the cylinder head deck surface before installing it with the oil control valve tightened to 120 nm (89 ft. Lbs.). Next install the left secondary Timing Chain tensioner before moving to the installation of right bank 1 secondary Timing Chain by matching its three black links to respective actuator timing marks and intermediate sprocket position. Secure the secondary Timing Chain to the intermediate sprocket by lining up the sprocket rb timing mark with the black link on the chain. Mount the intake actuator ri on its timing black link position then bolt it into place with a tight 120 nm (89 ft. Lbs.) oil control valve. Drive the timing mark on the re actuator to align it with the black link of your Timing Chain. Install the actuator before using an oil control valve set to 120 nm (89 ft. Lbs.) of torque. Install the engine Oil Pump and front cover together with right and left Camshaft actuator housings when all secondary and primary timing components have the correct alignment.

OEM Cadillac STS Camshaft

17 Camshafts found

Cadillac STS Camshaft Part Number: 12625984

Cadillac STS Camshaft Part Number: 12625988

Cadillac STS Drive Shaft Part Number: 12577790

Cadillac STS Exhaust Camshaft Part Number: 12581635

Cadillac STS Camshaft Part Number: 19431713

Cadillac STS Camshaft Part Number: 12566671

Cadillac STS Exhaust Camshaft Part Number: 12565172

Cadillac STS Exhaust Camshaft Part Number: 12565171

Cadillac STS Intake Camshaft Part Number: 12565168

Cadillac STS Intake Camshaft Part Number: 12563833

Cadillac STS Camshaft Part Number: 12566669

Cadillac STS Camshaft Part Number: 12625986

Cadillac STS Camshaft Part Number: 12625990

Cadillac STS Intake Camshaft Part Number: 12581636

Cadillac STS Intake Camshaft Part Number: 12581634

Cadillac STS Exhaust Camshaft Part Number: 12581633

Cadillac STS Camshaft Part Number: 12625987

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