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Stop Lifter Tick Before It Damages Your Engine
Hydraulic lifter noise is more than an annoyance. It is an early warning sign of oil starvation, wear deposits, or sluggish oil flow inside your valve train. Liqui Moly LQM20004 Hydraulic Lifter Additive is a specialized oil supplement engineered to dissolve the sludge and varnish deposits that restrict lifter movement, restore proper hydraulic pressure to noisy tappets, and reduce metal-to-metal wear before permanent damage occurs. Add one full 300ml can to your engine oil at any time and let it circulate. No drain required.
Key Features
- Dampens hydraulic lifter and tappet noise quickly by restoring full oil pressure to valve train components
- Cleans varnish and sludge deposits from oil passages, lifter bores, and hydraulic lash adjusters
- Reduces friction and wear on cam lobes, rocker arms, and lifter faces
- Safe for catalytic converters, GPF, and DPF systems with no ash or phosphorus overload
- Compatible with virtually all commercially available mineral, synthetic, and semi-synthetic motor oils
- Compatible with belt-in-oil (wet belt) systems
- Self-mixing formula, no special procedure required
- One 300ml can treats 3 to 6 liters (3.2 to 6.4 US quarts) of engine oil
- Suitable for all 4-stroke gasoline and diesel engines, naturally aspirated and turbocharged
- Manufactured in Germany to Liqui Moly's ISO 9001 quality standards
Specifications
| Detail | Value |
|---|---|
| Part Number (MPN) | LQM20004 |
| UPC | 016027685700 |
| Brand | Liqui Moly |
| Container Size | 300ml (10.1 fl oz) x 12 |
| Treats | 3 to 6 liters (3.2 to 6.4 US qts) of motor oil |
| Density at 20 C | 0.887 g/cm3 |
| Viscosity at 20 C | 1,100 mPas |
| Color | Amber |
| Application | All 4-stroke gasoline and diesel engines |
| Packaging Unit | 12 cans per case |
| Country of Origin | Germany |
What's Included
- 12 x Liqui Moly LQM20004 Hydraulic Lifter Additive, 300ml metal can
About Liqui Moly
Liqui Moly is a German lubricant and additive specialist founded in 1957, headquartered in Ulm, Germany. The company produces more than 4,000 products ranging from engine oils and additives to car care items, all manufactured under strict ISO 9001 quality management. Liqui Moly products are sold in over 150 countries and are trusted by OEM dealerships, professional motorsport teams, and everyday enthusiasts who demand German engineering precision in every bottle.
Frequently Asked Questions
When should I use Liqui Moly LQM20004 Hydraulic Lifter Additive?
Use it any time you hear a ticking, tapping, or clattering noise from your valve train, especially during cold starts. It is also a good preventative measure when changing oil in high-mileage engines or engines that have sat unused for an extended period.
Can I add LQM20004 to my oil without draining the old oil first?
Yes. The formula is fully self-mixing and can be added directly to your engine through the oil filler cap at any time without draining. Pour the full 300ml can in and allow the engine to run for at least 10 to 15 minutes so the additive circulates fully.
How much engine oil does one can of LQM20004 treat?
One 300ml can is designed to treat between 3 and 6 liters (approximately 3.2 to 6.4 US quarts) of engine oil. For most passenger cars with a 4 to 5 quart capacity, one can is the correct dosage.
Is LQM20004 safe for engines with a catalytic converter or particulate filter?
Yes. Liqui Moly LQM20004 is formulated to be safe for catalytic converters, gasoline particulate filters (GPF), and diesel particulate filters (DPF). It does not contain heavy metals or excess phosphorus that could damage emissions equipment.
Will this additive work with synthetic motor oil?
Yes. LQM20004 is compatible with mineral, semi-synthetic, and full synthetic motor oils from virtually all major brands. It is also safe for use in engines with a belt running in oil (wet belt timing systems).
How long does it take for the hydraulic lifter additive to work?
Many users report a noticeable reduction in lifter noise within the first 10 to 30 minutes of driving after adding the product. In cases of heavier varnish buildup or severely stuck lifters, it may take one full oil change interval to see the full benefit.
Can I use LQM20004 in a diesel engine or a turbocharged engine?
Yes. It is suitable for all 4-stroke gasoline and diesel engines, including those equipped with turbochargers or superchargers. Always verify your engine oil level is within the normal operating range before adding any supplement.
Is LQM20004 safe for use in a motorcycle engine?
No. Liqui Moly specifically states that LQM20004 is NOT suitable for motorcycles equipped with a wet clutch (where the clutch runs in the engine oil). Using it in a wet-clutch motorcycle may cause clutch slippage. It is intended for 4-stroke automotive engines only.
What is the difference between a hydraulic lifter additive and an engine flush?
An engine flush (such as Liqui Moly Engine Flush) is a short-duration cleaning agent added just before an oil drain to dissolve accumulated sludge. A hydraulic lifter additive like LQM20004 is a long-term supplement left in the oil for an entire change interval. It specifically targets the small oil passages and hydraulic chambers inside tappets rather than performing a broad sump cleaning.
Do I need to use LQM20004 every oil change?
No, it is not required every interval. Many owners use it during an oil change where noisy lifters are present, then switch back to standard oil on the next change to assess improvement. For high-mileage or oil-burning engines, some owners add it once per year or once every two oil changes as preventative maintenance.
Installation Instructions
- Ensure the engine is at normal operating temperature or has been recently run for at least 5 minutes.
- Park the vehicle on a level surface and turn off the engine.
- Remove the engine oil filler cap.
- Shake the LQM20004 can well before opening.
- Pour the entire contents of the 300ml can directly into the engine through the oil filler opening.
- Replace and tighten the oil filler cap.
- Start the engine and allow it to idle for 10 to 15 minutes so the additive fully circulates through the oil passages.
- Check the oil level with the dipstick and top off with the appropriate motor oil if needed to reach the full mark.
WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.
Liqui Moly
Liqui Moly parts and accessories for performance street, track and race builds are stocked at Black Ops Auto Works. Liqui Moly motor oil, Molygen, Top Tec, transmission fluid, gear oil, coolant, Cera Tec, MoS2, Pro-Line treatments, cleaners, greases and vehicle-care products are stocked at Black Ops Auto Works. These German OE-quality fluids support luxury European platforms plus import and domestic engines when the required specification is confirmed. Every product is filterable by year, make, model, trim, engine and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 146 Liqui Moly SKUs across fitment, sizing, material, fuel-system and installation dimensions. What This Liqui Moly Collection Covers Liqui Moly offers fluid and additive choices for routine service, high-mileage maintenance and performance-minded ownership. Start with the exact manufacturer approval, viscosity grade and system application, then select the proper fluid quantity for th...
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