Why Shop With Us?

Car Parts Number 01392 215 635

Commercial Vehicle Department 01392 215 218

Free Delivery for orders over £50 GB mainland only
Best online prices guarantee
Multiple branch locations
Contact Us

sign up to emails

Stay updated with the latest news, tips and offers!

customer service: +44 (0) 1392-215635 +44 (0) 1392-215218 banner2
Wynn's Cooling System Flush
Part No.: WYN45944

Сlick on the image to enlarge

Image is for display only and maybe differ slightly from actual product.

inc. VAT

In stock

  • Speak to one of our team on 01392 215635

Wynn's Cooling System Flush is a concentrated product designed to thoroughly clean all automotive cooling systems.

• Powerful acid free radiator cleaner.
• Dual action:
1. Removes scale.
2. Eliminates rust, deposits and oily residues.
• Excellent performance in all types of cooling liquid, including OAT coolant.
• Keeps dirt and particulates in suspension whilst cleaning.
• Safe for rubber hoses, seals and all metals in the cooling system.
• Extremely effective in all closed-circuit cooling systems.
• Restores the optimal operation of the controls within the cooling system.

• Recommended for "water" cooled systems of all petrol and diesel engines.
• Recommended for use when changing the cooling liquid (follow manufacturer's recommendations).
• Particularly effective when cleaning older cooling systems. 


• Shake contents well and add to the cooling system via the expansion tank if part of the system circuit (2 hoses: out and return), or directly into the radiator if a single hose overflow tank is fitted.
• For higher performance, first replace the old coolant by water, then add Wynn’s Radiator Flush.
• Warm up the engine with the heater control in HOT position.
• Let the engine run at idle for 10 minutes. Heater still in “hot” position.
• Stop the engine and allow to cool, open drain valve and empty the system.
• With system still open, flush with water until clear, close system and refill with coolant.
• One bottle of 325 ml treats a system of 5 to 12 litres.
• Add Wynn’s Radiator Stop Leak as a leak preventive agent.

In case of cooling systems with cooling liquid filters, disconnect this device during the cleaning operation.

This web site uses Google Analytics, which collects anonymous visitor information to help us keep the site relevant and up to date. To do this it sets 'cookies', small text files on your computer.

Tell me more about cookies and how to opt out
That's OK, don't show this message again