Earlier this year, I wrote for another group...
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COOLANT
Do not mix antifreezes. Not just types but even different formulas from the same manufacturer. In addition to not freezing, antifreeze is made to combat corrosion. Manufacturers use different chemicals and recipes. If mixed, some chemicals cancel each other out. The result is reduced protection.
The Deauville engine has been around for more than 30 years. The specified coolant is ‘high quality ethylene glycol antifreeze containing corrosion protection inhibitors’ with the instruction to ‘replace every 2 years, or at the indicated odometer intervals [24,000 miles], whichever comes first’ together with the warning ‘Using coolant with silicate corrosion inhibitors may cause premature wear of water pump seals or blockage of radiator passages. Using tap water may cause engine damage.’
Things change and usually improve. I consider replacing the coolant with a modern one, as they appear to be more stable. The figures of 100,000 miles and ten years are bandied around.
The shelf life of my chosen brew is five years and I buy five litres. The total capacity of the NT700 is 2.28 litres.
Comma Super Longlife Red Antifreeze & Coolant - Ready To Use - 5 Litre
5 Year Longlife Protection. Based on coolant concentrate that conforms to: BS6580:2010. We will do everything to solve any problem. Top Service. Headquarters is based in Northampton, United Kingdom.
www.ebay.co.uk
The system will be flushed twice with tap water, twice with tumble drier condensate, then with distilled water and then charged with the coolant. Hopefully, there will be nothing to report other than good running and the next change in 2026.
If after 2,000 miles, I find myself with time and the fairing off, then the coolant may be changed again. The idea being that by then, anything foreign will be neutralised and corrosion protection will be bolstered. It will be a simple drain and refill with no flush. In any case, the coolant will just go off in the container.
References are specific to the NT700.
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