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Product details
LIQUI MOLY Radiator Cleaner is a 300 ml cooling system flush that removes sludge, oil, grease, and lime deposits from the radiator and heater circuit before you refill with fresh coolant. Deposits in the radiator and heating system act as a barrier to heat exchange and can block thermostatic valves and regulator mechanisms, which lets engine temperatures run too high and raises the risk of wear and damage. The cleaner contains no acids or alkali. It disperses sludge, removes oil and grease residues, chemically converts lime, and neutralizes acids. It behaves neutrally in contact with rubber and plastics, and it is compatible with all types of antifreeze. LIQUI MOLY makes it in Germany.
This product carries a 24-month or 24,000-mile warranty.
A radiator flush loosens the scale and residue that old coolant leaves behind so it drains out with the cleaner instead of circulating into the new fill. One can treats up to 10 liters (2.6 gallons) of cooling system water. LIQUI MOLY recommends it when the wrong coolant has gone into the system, or as a preventive step during a coolant change, and calls it ideal for older systems. It is suitable for all cooling water systems in motor vehicles, buses, and commercial vehicles.
LIQUI MOLY was founded in Ulm, Germany, in 1957, when Hans Henle acquired the LIQUI MOLY name and a patent for a molybdenum disulfide oil additive. The company has been based in Ulm-Lehr since 1978, develops and produces its oils and additives in Germany, and tests every step from raw material delivery through production to shipping.
Technical Details
- Manufacturer: LIQUI MOLY
- Part number: 2051
- Product name: Radiator Cleaner
- Contents: 300 ml can
- Treatment ratio: one can per 10 liters (2.6 gallons) of cooling water
- Free of acids and alkali; neutral toward rubber and plastics
- Compatible with all antifreeze types
- Made in Germany
- Warranty: 24 months or 24,000 miles
Installation & Tuning Notes
Add the contents to the cooling water and run the engine with the heating system on. Depending on how contaminated the system is, let the engine run for about 10 to 30 minutes. Drain the cleaner, flush the cooling system with water, and refill it according to the vehicle manufacturer's instructions.
Common Questions
Will it attack hoses or plastic tanks?
LIQUI MOLY rates it neutral in contact with rubber and plastics, and it contains no acids or alkali.
When should I use it?
Use it after the wrong coolant has been added, or as a preventive measure during a coolant flush, particularly on older systems.
PMB Performance sells LIQUI MOLY service chemicals for European cars of every age.
Fitment & Compatibility
Radiator Cleaner is not tied to one make or model and suits any motor vehicle, bus, or commercial vehicle cooling water system. Check your cooling system capacity against the treatment ratio before buying, as larger systems may need a second can. Send us your VIN if you would like us to look up your system capacity.
