The hydraulic lifter in a car’s engine uses oil pressure to adjust a plunger and take up all the clearance in the valve train. This helps to ensure less engine noise and longer reliability, due to less wear and tear. A faulty hydraulic lifter will usually result in the rocker arm, valve tip and push rod also going bad if left unattended.
Signs of a Faulty Hydraulic Lifter:
The most obvious symptom of a faulty hydraulic lifter is the noise it creates in your car’s engine. You can usually distinguish the faulty lifter by the distinct sound. Instead of a knock or ping, a faulty hydraulic lifter will usually make a sound more reminiscent of a tapping sound. The tapping will be quick in rhythm and may occur when the vehicle is cold or hot, depending on what the problem with the hydraulic lifter is. The lifter may be having problems with a sticking check valve, dirt, wear or other problems.
Why do lifters make a ticking noise?
Hydraulic lifters are self-adjusting. They will tick when something causes them to lose their internal oil pressure. Pressure loss can occur if the internals of the lifter become dirty from not doing routine oil changes. It can also occur if you don’t use oil of the proper weight, causing it to bleed out of the lifter when the engine is off or not pump in fast enough when you turn the engine on.
How do you fix this noise without replacing lifters/ tappets?
Firstly you need to check whether you are currently using the correct viscosity grade of engine for your vehicle. If you don’t know what kind of oil your car should be using, visit this link: http://www.datateck.com.au/Lube/Liqui-MolyAus/
It’s also important that you check your oil level and the number of kilometres since your last service. This should tell you whether your oil is serviceable; if it doesn’t look good you might need to change your engine oil before proceeding. If you’d like to learn more about changing your oil, visit this link: http://www.liqui-moly.com.au/diy-oil-change/
Solve the problem
Oil additives can be used to solve an array of engine problems including stopping oil leaks and dampening noise for quieter running. When it comes to common problems – additives can offer an economical long term fix, without the need for major costly repairs. Performance driving and high load applications like towing, wear out engines much faster than normal driving. High quality fuel and oil additive supplements combined with a manufacturer specified motor oil, ensure practical service life of your engine is maximised.
Liqui-Moly Tappet Stop Noise dampens the noise caused by worn hydraulic lifters/tappets. It cleans valves, guides and bores and promotes optimum operation without affecting oil viscosity. Suitable for all petrol, diesel and LP gas engines. Compatible with all commercially available mineral and synthetic motor oils. Safe and effective for turbocharged and supercharged engines. The use of Tappet Stop Noise additive allows for optimum functioning of hydraulic lifters by cleaning the valves, guide, bores and will not affect oil viscosity. It’s a much cheaper problem solving solution in comparison to having all the tappets replaced which can be quite costly. Tappet Stop Noise is an easy-to-use product with simple instructions printed on the back of the 300ml can. It is readily available in most automotive retail stores.