Noisy tappets? HLA or Valve rattle? Try Ametech ENGINE RESTORER + MOTOR CLEANER 5411910040645 | eBay
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E40 Hydraulic Tappet Cleaner
Wynns Hydraulic Valve Lifter Treatment 325ml | Euro Car Parts
Noisy Tappet Noisy Valve Train and Top End Rattle Treatment for 2 Litre engines
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VOLTRONIC® E40 HYDRAULIC TAPPET CLEANER | Lubricant, Motor oil, Additive, ATF, Gear Oil, Anti-freeze Coolant, Brake Fluid, Car Care and Chemical, Made in Germany.