Noisy Hydraulic Tappets : eBay Guides

Noisy Hydraulic Tappets can be cured by simply pouring RESTORE into the normal engine oil.  If you have an older style (ie pre-hydraulic lifters) worn valve guides and cam bushings we recommend removing the rocker cover (also called the valve cover) and pouring a few drops of RESTORE directly onto each moving component (you need to get the RESTORE onto the valve stems i.e. through the springs) and cam wear surfaces.  An old plastic syringe or oil can works well (don't use it for anything else afterwards of course). Try adding a STOP-LEAK/ANTI-LEAK as well to recondition and fatten up valve stem oil seals. This normally takes care of valve guide problems on older engines. If you have a new style hydraulic lifter engine then simply pour a small can of RESTORE into the sump through the oil filler.  Note: RESTORE will NOT be able to rebuild a cam lobe that has been ground away by bad oil or lack of lube or low oil levels though.  You may need to add hydraulic lifter shims if the cam lobes have been ground away by a low oil situation, or eventually change the camshaft if it is too bad. This applies especially to the latest PD (pompe deuse) VW AUDI engines where the factory specified oil contains zinc to try and prevent extreme wear in the injector cam followers (these PD injector pumps operate at ridiculously high pressures (up to 15,000 psi) and if you don't use the specified special PD spec oil then you will experience advanced wear to the cam lobes that operate the individual injectors quickly requiring a new camshaft !