Genuine Volvo S40 Belt Tensioner

Volvo S40 Belt Tensioner Parts and Q&A

• Belt Tensioner
  30637955
  Q: How to remove and refit the Belt Tensioner and Timing Belt on engine components for 2.0 litre 4-cylinder diesel engine on Volvo S40?

  A:

  To remove the engine parts, first disconnect the battery negative lead and remove the plastic cover on top of the engine. Lift the coolant expansion tank without disconnecting the hoses and move it aside. Loosen the front right hand roadwheel bolts, raise the car on axle stands, and place the car on axle stands securely before removing the roadwheel. Remove the engine undershield by releasing the 7 Torx screws and take the auxiliary drivebelt off. Support the engine before removing right hand mounting, by engine support bar or crane and attach lifting gear to engine lifting eye. With the engine supported, remove the right hand engine mounting, remove cable clip on timing belt cover, remove bolts to remove top timing belt cover. Loosen the crankshaft pulley bolt without losing the old bolt for reassembling. Use special tools to set the engine at TDC for No 1 cylinder or you can use an 8mm drill bit and rod. Remove the bolts from the starter motor and set it to one side to reveal the crankshaft setting tool hole. Rotate the engine clockwise until the camshaft sprocket hole and the Cylinder Head hole are aligned, insert the crankshaft setting tool and have an assistant rotate the crankshaft to align the holes. Insert the camshaft locking tool through the camshaft sprocket into the cylinder head, adjusting the camshaft sprocket a bit if necessary. Disconnect the wiring plug from the crankshaft position sensor, undo the bolt and remove the sensor. Remove the crankshaft pulley and sensor ring/spacer and undo the bolts to remove the lower timing belt cover. Raise the engine a bit and release the timing belt tension by loosening the bolt of the timing belt tensioning pulley, and remove the timing belt, which is not allowed to be used again. Loosen the bolts and remove the engine mounting bracket and idler pulley, and remove the tensioner bolt, the tensioner, and idler pulleys. If it is not immediately to be provided with a new timing belt, then temporarily refit the right-hand engine mounting and tighten the bolts. To refit, make sure that the crankshaft and camshaft are still at TDC on No 1 cylinder, fit the new idler pulley, and insert the retaining bolt. Refit the engine mounting bracket and tighten the bolts to the recommended torque. Fit the new timing belt tensioner and tighten it finger tight. Fit the new timing belt over the sprockets properly (the arrows on the timing belt should point to the direction of rotation). Turn the tensioner arm anti-clockwise until the pointer is in the correct position and then tighten the tensioner retaining bolt firmly. Refit timing belt lower cover and tighten bolts and then sensor ring/spacer and crankshaft pulley, tighten old pulley bolt to specified torque. Remove the setting/locking tools, then rotate the crankshaft two complete revolutions clockwise and check to see if the camshaft locking tool can be reinserted. Adjust the tensioner pointer, if required, and tighten the retaining bolt tightly. Replace the old crankshaft pulley bolt with a new one, tightening the new bolt to the specified torque, and not rotating the crankshaft. Finally, remove the locking tools and complete the refitting process, making sure to tighten all fasteners to their specified torque.