OEM Chevrolet Tracker Variable Timing Sprocket

Chevrolet Tracker Variable Timing Sprocket Parts Questions & Experts Answers

• Camshaft Gear
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  Q: How to replace the Timing Chain and Variable Timing Sprocket for the camshaft on Chevrolet Tracker?

  A:

  Start by disconnecting the negative Battery Cable then remove the timing chain housing before beginning the replacement of the Camshaft timing chain and sprockets. Remove spark plugs first to help turn the Crankshaft for proper timing mark position before disassembly because this prevents damage to valves and Pistons. Engine block marks allow users to align crankshafts 90 degrees and Cylinder Head notches enable turning camshafts 15 degrees when needed. To achieve correct alignment rotate the Crankshaft until the number 1 cylinder reaches top dead center (TDC) as the Crankshaft keyway faces the engine block mark while the idler sprocket arrow points up with the Camshaft guide pins located at the Cylinder Head. You should start by turning the intake Camshaft counterclockwise until the tension eases then remove the retaining nut together with bolts 1 and 2. The Camshaft Timing Chain Tensioner and gasket follow next. With a wrench secure the Camshaft before removing its sprocket bolts so you can remove the chain along with the sprockets. Carefully check the Camshaft timing chain upper guide and tensioner together with tensioner gasket and sprockets and chain components for wear indicators and damage. Replace all components showing wear or damage. During installation position the Crankshaft keyway exactly at the engine block mark while the idler sprocket arrow faces up and the Camshaft guide pins must align with notches on the Cylinder Head. The installation requires the yellow Camshaft timing chain link to match the arrow on the idler sprocket combined with the dark blue link that aligns with arrows (2,3) on the Camshaft sprockets. When installing the Camshaft sprockets with their attached chain, torque all Camshaft sprocket bolts to 80 nm (58 ft. Lbs.). Compress the Camshaft tensioner plunger into the body and lock it with the retainer, next position the gasket and Camshaft Timing Chain Tensioner in place before tightening bolts to 11 nm (97 inch lbs.) and the nut to 45 nm (33 ft. Lbs.). Turn the Crankshaft two times to match the keyway position on the Crankshaft with the engine block timing mark. At this point check that the Camshaft guide pins sit properly within their notches on the Cylinder Head. First apply engine oil to the timing chains with their components and tensioner and guides and sprockets before you put the spark plugs in with a 25 nm (18 ft. Lbs.) tightness. Install the timing chain housing while reconnecting the negative Battery Cable as the last step.