Genuine Volvo V50 Valve Lifter

Volvo V50 Valve Lifter Parts and Q&A

• Valve Lifters
  1298588
  Q: What are the steps involved in removing and inspecting the camshaft and valve lifter for 1.8 and 2.0 litre petrol engines on Volvo V50?

  A:

  Only turn the engine's direction of rotation which is anticlockwise from the right-hand side of the vehicle. Start by taking the cylinder head cover off and setting the engine to TDC on No 1 cylinder. To reach the timing chain tensioner and guide, remove the timing chain cover's lower and upper blanking plugs. Slacken the timing chain tensioner tensioning using a small screwdriver to release the pawl mechanism, then gently turn the exhaust camshaft clockwise to compress the tensioner. While holding the exhaust camshaft in place, insert a bolt in the upper access hole in the timing chain cover to hold the tensioner guide rail in place. With the camshafts in position, loosen the camshaft sprocket retention bolts and take a cable tie and attach the timing chain to the camshaft sprockets. Remove the camshaft sprocket retaining bolts and sprockets along with the timing chain and keep them in place with an appropriate piece of wire to prevent it from falling into the timing cover. Gradually and evenly slacken the camshaft bearing cap bolts by half a turn at a time to take away the pressure of the valve springs, and then withdraw the camshaft bearing caps, making note of the marks on them, and withdraw the camshafts. To identify the intake camshaft relative to the reference lobe for the camshaft position sensor: No marking of the camshafts is necessary. Obtain sixteen little clean containers, numbered from 1 to 16, and with the help of a rubber sucker withdraw each of the said bucket tappet in turn, placing them in the containers without interchanging them, since they are of different sizes. Check each camshaft and tappet for evidence of wear and measure the outside diameter of the camshaft for each tappet with a micrometer, making several measurements to look for any taper or ovality. Visually inspecting the camshaft lobes for score marks, pitting, galling and signs of overheating, renewing camshaft lobes with such signs. Inspect the camshaft bearing journals and cylinder head bearing surfaces for wear or pitting, measuring each journal's diameter at a number of points with a micrometer. To check camshaft endfloat, clean the bearing surfaces, refit the camshafts and bearing caps, tighten the bearing cap bolts to specified torque and measure the endfloat, using a DTI. If the endfloat is greater than the specified service limit, replace the new component or replace the cylinder head if clearance is still excessive. During reassembly, oil the cylinder head tappet bores and tappets, carefully refitting each of the tappets to its original bore. Turn the engine back about 45deg to be certain you haven't got any pistons at the top of the cylinders, and then lubricate the camshaft bearings and lobes with oil and refit the camshafts in their original places. Each camshaft bearing cap is marked with a number and letter and caps should be tightened in sequence, gradually putting pressure on the valve springs. Fit the camshaft aligning tool to set TDC then refit camshaft sprockets with timing chain, without tightening the retaining bolts at this point. Remove tensioner guide rail locking bolt and turn engine approximately 45 degrees to TDC. With the camshafts held in position, tighten the camshaft sprocket holding bolts to the camshaft specified torque. Remove the camshaft locking plate and crankshaft timing peg, making two full revolutions of the engine, and refit the locking plate and peg to the engine to ensure that the engine stays at TDC. Finally, refit the timing chain cover upper and lower blanking plugs (use a suitable sealant on the threads to prevent leaks) and the cylinder head cover.