Genuine Volvo S80 Cam Gear

Volvo S80 Cam Gear Parts and Q&A

• Camshaft Gear
  9180721
  Q: Should the Belt Tensioner and Cam Gear be replaced whenever the timing belt is renewed on Volvo S80?

  A:

  Whenever the Timing Belt is renewed, the tensioner and idler pulley should also be renewed at the same time. To remove the timing belt tensioner, remove the timing belt and then remove the center bolt and tensioner. Roll the tensioner roller to see if there is any sort of rough or noise (indicating bearing wear), if in doubt renew the tensioner. For refitting, the tensioner must be put back in place, then the bolt can be put in place without tighten it completely by making sure the tensioner fork finds the right place over the rib on the cylinder block, then refit and tension the timing belt. To remove the camshaft sprocket, remove the timing belt, unscrew the bolts on the sprocket, while holding the sprocket in place, remove it from the camshaft. For refitting, take out the vacuum pump from the left-hand end of the exhaust camshaft and put a camshaft locking pin in the cylinder head and camshaft sprocket, and inspect the alignment of the crankshaft sprocket and oil pump housing. Turn the crankshaft clockwise about 15 degrees and then refit the sprocket to the camshaft, tightening the bolts to the point where there is still some movement between the two. Remove the blanking plug from the cylinder block, insert the crankshaft stop tool, and rotate the crankshaft counter-clockwise to the point where the crankshaft web of No 5 cylinder rests against the stop tool and check the marks on the alignment. Refit timing belt, have all the marks line up, and tighten camshaft sprocket bolts to the recommended torque, remove the locking tool and crankshaft stop tool, and refit vacuum pump and blanking plug. For the crankshaft sprocket removal, remove the timing belt, and if need be, use a puller to remove the sprocket, not levering it off to avoid damage. For refitting, clean the mating surfaces, ins attach the timing marks and fit the timing belt around the crankshaft sprocket, idler pulley, camshaft sprocket, coolant pump and tensioner pulley, refit the pulley to the sprocket and crankshaft nut (tighten it finger tight) and rotate the crankshaft in an anti-clockwise direction approximately 45 degrees. Stop the movement of the crankshaft, tighten the pulley nut and bolts to the specified torque, tension the timing belt and finish the refitting procedure. To remove the idler pulley, remove the timing belt, remove the bolt, and remove the idler pulley, and refitting is a reverse operation of removal and make sure all the bolts are tightened to their specified torque.
• Camshaft Gear, Driver Side
  3531523
  Q: How do Cam Gear, Camshaft Seal and Variable Timing Solenoid affect the procedure for using the camshaft locking tool 999 5452 and ensuring proper valve timing during camshaft sprocket removal on Volvo S80?

  A:

  For this procedure, one needs the Volvo camshaft locking tool 999 5452, which stops the camshafts turning while the sprockets are removed, and details for a home-made alternative are given. It is important that the camshafts be locked so that valve timing is not lost. In addition it is necessary Volvo tool 999 5451. Start by removing the Timing Belt then remove the air cleaner assembly and intake ducts to get access to the left-hand end of both camshafts. Remove the cross-stay mounting bracket from the top of the engine, then for non-turk models remove the camshaft position sensor housing from the intake camshaft. For turbo models, eliminate the sensor housing from the exhaust camshaft and the sensor rotor plate. Next follow the instructions to remove the bracket from the Cylinder Head at the left hand end if fitted, and use a screwdriver to prime out the plastic blanking plug at the end of the appropriate camshaft, being prepared for oil spillage. Make sure that the slots in the camshafts are parallel to the join between the upper and lower parts of the cylinder head before locking them in place. Check the timing marks on the crankshaft sprockets and then fit the locking tool on the left-hand side of the cylinder head in such a way that it makes a firm contact with the camshaft slots. If both camshaft sprockets are going to be removed, mark them for identification. For a sprocket that has a variable valve timing unit, use a Torx 55 key to remove the plug and central retaining screw, then pull the camshaft sprocket off. For a sprocket that has no variable valve timing, remove the three bolts and pull out the sprocket. Carefully remove the seal without damaging the sealing face of the shaft, clean the seat of the seal, and lubricate the new oil seal, and fit the oil seal. Refit the camshaft sprocket with aligned timing marks, the bolts tightened just enough to permit movement. For the variable valve timing sprocket, make sure to place the crankshaft in the right position, remove the starter motor and insert the crankshaft stop tool. Rotate the crankshaft anti-clockwise until it hits the tool and press it with the VVT unit onto the camshaft and tighten the tight screw lightly. Adjust the sprocket bolts to the middle of the slots on the VVT unit and tighten gently and turn the VVT unit clockwise to stop and slacken the retaining screw. Temporarily reattaching the timing belt cover and aligning the marks in the sprocket rim with the timing belt cover then tighten the VVT unit screw to the specified torque. Fit the new timing belt to the sprockets, slacken off the bolts holding the VVT unit and non-WT sprocket and refit the center plug to the VVT unit, and tighten it to the specified torque. Apply the appropriate torque of the camshaft sprocket bolts and check the position of the timing belt tensioner arm and adjust, if needed. Finally, remove the camshaft locking tools and crankshaft stop tool, turn the crankshaft clockwise through two full revolutions and check that all the timing marks can be realigned, this means that the tensioner pointer is aligned with the central notch, then complete the refitting process.