1.                  Before fitting the camshaft check that it is identical in every respect (EXCEPT FOR LOBE PROFILES) to the one being replaced. Special attention should be given to the oil feed details and journal diameters as variations may occur during the manufacture of the engine.

2.                  On Vauxhall front wheel drive camshafts – a ball bearing is supplied loose with the camshaft. Please check the original camshaft to see if a ball is fitted into the distributor end main oil gallery. If so, fit supplied ball as per original Vauxhall cam.

3.                  Liberally coat both the camshaft and cam followers with cam lube before installation (Only new Cam followers must be used ). Failure to do so can cause scuffing between the surfaces of the cam and cam followers which will result in premature wear.

4.                  Upon installation valve springs must be checked to ensure that coil binding does not exist at full lift. There must be a minimum clearance of .040” (1mm) between the centre coils.

5.                  When double springs are being installed in place of singles, the valve spring retainer cap must be machined to accept the inner spring. Alternatively in most instances we are able to supply modified caps in steel or titanium

6.                  Once the valve springs have been installed check both inner and outer springs for coil binding and ensure that the bottom face of the spring retaining cap does not contact the top of the valve guide or valve stem oil seal. Minimum clearance on full lift .060” (1.5mm). If this clearance cannot be achieved the top of the guides must be machined.