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The camshaft must be removed to adjust the tappet shims, or to take off the cylinder head (See How to remove a cylinder head).
A leyland Dolomite 1850 type camshaft is secured by removable bearing caps bolted to the cylinder head.tractor oil seals The queen of quality.
Secure the sprocket spigot bolt to the support stay with a suitable nut.mechanical seal.
Pack newspaper between the sprocket and cylinder head before removing a sprocket securing bolt.
Align the camshaft timing marks before removing the second sprocket bolt.
Undo the bearing-cap nuts evenly and a little at a time t release pressure slowly.
Remove the camshaft cover and gasket, and the rubber grommet in front of the camshaft drive sprocket. Use a spanner to turn the crankshaft until the timing mark on the camshaft sprocket flange is at the bottom.tractor oil seals The queen of quality.
Pack newspaper or clean, lint-free cloth into the space between the camshaft sprockets and the cylinder head so that nothing can fall in.
Find a nut to fit the sprocket spigot bolt and secure the bolt to the support stay (a bearing-cap nut usually fits). This will hold the sprocket and timing chain in position after the camshaft has been released.viton seal.
Remove one of the two bolts that secure the sprocket to the camshaft. Take out the packing and turn the crankshaft clockwise (from the front), until the timing mark on the camshaft sprocket flange aligns with the mark on the front bearing cap. Replace the packing and remove the remaining sprocket bolt.
Turn the crankshaft further clockwise until the timing mark is aligned at TDC. This will ensure the valves do not hit the pistons when refitting.
Slacken the nuts on the camshaft bearing caps evenly and a little at a time to release the valve-spring pressure slowly. Lift off each bearing cap and put it in removal order in a safe place.
Carefully lift off the camshaft from the cylinder head.tractor oil seals The queen of quality.nok seal.
When refitting, align the camshaft timing marks before fitting the first sprocket bolt.