Genuine Volvo V50 Intake Valve

Volvo V50 Intake Valve Parts and Q&A

• Intake Valve
  9454607
  Q: How to properly measure and adjust the intake valve clearances on Volvo V50?

  A:

  Only spin engine in the normal direction of rotation (clockwise, as seen from the right-hand side of the car). Begin by removing the cylinder head cover and setting the engine to TDC on cylinder No 1 (ensure inlet and exhaust cam lobes of No 1 cylinder are pointing upwards) for the measurement of valve clearances. For each valve, measure the clearance between the base of the cam lobe and the bucket tappet with the help of feeler blades, and record the thickness of the blade which will give a firm sliding fit for all valves of No 1 cylinder, keeping in mind that the clearances sought are different for inlet and exhaust valves. The intake Camshaft is on the front of the engine and there is an exhaust camshaft at the back. After recording the clearances of cylinder No 1, rotate the crankshaft in the clockwise direction through 180deg to check the valve clearances of cylinder No 3 and repeat the process for cylinders 4 and 2. If adjustments must be made, remove the camshafts to adjust the bucket tappets. A thinner bucket tappet should be fitted if the valve clearance is too small, while a thicker one is required if the valve clearance is too large, the bucket tappet has a number engraved on the inside, and if this is missing then a micrometer will be needed to see the thickness. Calculate the thickness of the new bucket tappet to be made according to the desired and measured clearances and the tappet thickness found. After fitting the correct thickness bucket tappets in the cylinder head refit the camshafts and check the valve clearances again. If any of the clearances are still out of specification, repeat the adjustment procedure. Keeping a record of thickness of bucket tappets fitted at each position will assist in future adjustments and the required buckets can be purchased in advance once the clearances and existing thicknesses are known. Finally, when everything is correctly cleared, refit the cylinder head cover.