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Home > Noisy Tappets and Valves

Noisy Tappets | Valve Train Noise | Top End Rattle | Noisy Hydraulic Lifters | Noisy HLAs | Noisy Car Engine

Noisy Tappets and Valves, Top End Rattle

The causes of top end rattle in an engine, often described as sounding like a 'Bag of Nails', are many and varied and often difficult to identify without removing the cylinder head. In the first instance, it pays to consult a qualified motor mechanic to eliminate mechanical causes such as worn dephaser pulleys on VVT units, slack timing chain and even the inadvertent use of cheap aftermarket oil filters without non-return valves, which allow the oil to drain down overnight. Ignoring a mechanical cause of engine noise can result in catastrophic engine failure, so obtain a diagnosis first before trying a chemical additive.

Oil starvation is another possible cause of top end rattle. Blocked or narrowed oil-ways and dirty channels inhibit adequate lubrication to the hydraulic tappets or lifters (HLAs), valves and guides and can also cause piston rings to stick. Flushing the engine with a proprietary flushing oil, like RESTORE Motor Cleaner before an oil change will dissolve sludge, varnishes and gums from the engine, free up stuck rings and valves and open oil-ways to restore lubrication. This is strongly recommended before the use of Ametech RESTORE Engine Restorer.

Where lack of engine lubrication results in increased friction between two moving parts, the friction cuts scratches into the engine metal and this wear causes a loosening as the clearances between reciprocating and rotating components extend beyond the prescribed tolerances. This causes the sort of noises described as noisy tappets, valve train noise and piston slap. Ametech RESTORE Engine Restorer fills the scratches in the friction-producing surfaces with its unique CSL formula to restore the tolerances, reduce the rattles and tighten up the engine.

Some engines benefit from enhanced lubrication when all other considerations have been addressed, in the form of a Super Lubricant and Friction Reducer or a Metal Treatment and Conditioner. They work in different ways, but both types of product will protect the engine on start-up by keeping the engine parts lubricated during shut-down, so that lubrication is instantly available when the engine is started. This helps to prevent that ticking noise that is often apparent on start-up, but disappears after a couple of minutes when the engine oil has had a chance to reach the top of the engine. Ametech Super Lubricant also helps to prevent wear my maintaining oil viscosity at higher temperatures and keeps the engine oil and components clean, preventing the formation of varnish and gums.

For a really superior friction-reducer, choose Ametech Metal-Tec10 for your engine. This is a metal conditioner and treatment that chemically flattens friction-producing metal surfaces to eliminate asperities - the high points and low points that look like a mountain range under an electro-microscope - that cause friction, heat and wear in an engine. Ametech Metal-Tec10 smooths out those surfaces, increasing the boundary film strength of the engine oil; the engine oil holds to the metal surfaces and provides the best possible lubrication during start-up, no matter what the time of year, or temperature. Engine noise is reduced and the engine runs more efficiently, reducing fuel consumption too. If your engine is worn and you need to use Ametech Restore Engine Restorer to fill the scratches, this is best done a few hundred miles before adding Metal-Tec10 to the engine, just the give the Restore CSL particles a chance to bed in firmly first.

Please Note: Only those tappets with an hydraulic oil supply, otherwise known as hydraulic lifters or HLAs, will respond to Ametech's liquid chemical engine treatments. Mechanical tappets do not have an oil supply which is necessary for any of our products, which are added to the engine oil, to reach the moving parts to be treated.

250ml Ametech RESTORE Oil Engine Restorer & Lubricant.250ml Ametech RESTORE Oil Engine Restorer & Lubricant.
For Petrol, Diesel and LPG engines. Use one 250ml can for each litre of engine capacity or 10% RESTORE by volume to engine oil. This size can is suitable for up to 1.4 litres of engine size.
Price: £18.99
400ml Ametech RESTORE Engine Restorer & Lubricant400ml Ametech RESTORE Engine Restorer & Lubricant
400ml Ametech RESTORE Oil Engine Restorer & Lubricant for Petrol, Diesel and LPG engines. Use one 400ml can for each 1.6 litres of engine capacity or 10% RESTORE by volume to engine oil. This size can is suitable for 1.5 to 2 litres of engine size.
Price: £24.99
1 Litre Ametech RESTORE Engine Restorer & Lubricant1 Litre Ametech RESTORE Engine Restorer & Lubricant
For Petrol, Diesel and LPG engines. Use one 1 litre can for 4 litres of engine capacity or 10% RESTORE by volume to engine oil. This quantity of Engine Restorer will treat 4-5 litres of engine capacity.
Price: £49.00
Ametech RESTORE Motor Cleaner, Engine Flush 250mlAmetech RESTORE Motor Cleaner, Engine Flush 250ml
Add to old engine oil before an oil change and run the engine for 10-15 minutes to free the engine sump and oil-ways of harmful sludge, varnishes and gums and free up sticking rings and tappets. Keeps new oil clean for longer. Add one 250ml bottle to 3 to 6 litres of oil in the sump before oil change.
Price: £7.99
Ametech RESTORE Super Lubricant & Friction Reducer 250mlAmetech RESTORE Super Lubricant & Friction Reducer 250ml
Ametech RESTORE Super Lubricant & Friction Reducer – excellent anti-friction and anti-wear protection for newer engines. Frees up sticky hydraulic lifters, valve stems and piston rings and quietens noisy tappets and valve train noise.
Price: £7.99
Ametech METAL-TEC10 Anti-Friction ENGINE TreatmentAmetech METAL-TEC10 Anti-Friction ENGINE Treatment
Ametech Metal-Tec 10™ Anti-Friction Engine Treatment polishes, seals and protects metal surfaces in your engine to: reduce friction, heat and wear; enhance performance, power and fuel economy; reduce oil consumption. Add 50ml to each litre of oil or lube. Available in two sizes - 250ml and 500ml.
Price: From: £21.99
Noisy Tappet, Noisy Valve Train and Top End Rattle Treatment for 2 Litre enginesNoisy Tappet, Noisy Valve Train and Top End Rattle Treatment for 2 Litre engines
Noisy Tappet, Noisy Valve Train and Top End Rattle Treatment for a 2 Litre engine - three products to flush oil-ways clean, fill scratches in worn engine metal and enhance engine lubrication in one kit.
Price: £34.97

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SPECIAL OFFER! Restore, Clean and Seal oil leaks in a 4 litre engine

(incl UK Standard Delivery P&P)

for 2 litre engines

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treats 10 litre oil capacity

(incl UK Standard Delivery P&P)


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Ametech METAL-TEC10 Metal Treatment For TRANSMISSIONS 250ml
Ametech METAL-TEC10 Metal Treatment For TRANSMISSIONS 250ml


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