Volkswagen Enthusiast
When is the optimal time to do a full coolant / radiator flush? I always use to do it every 2 years but my last service it wasn't looked at (they did say it was 48%, of which 50% is full).
Worse thing is the risk of overheating especially with summer round the corner - although as the car is 2.5 years old , doubt it would happen (dodgy VW reliability not withstanding)
Current ride: 2014 Range Rover Evoque 5 Door TD4 Pure | 9 Spd Auto | Fuji White | Black Leather | 19 inch 'Dynamic' Wheels
Previous rides: MY11.5 Golf GTI 5 door | DSG | Candy White | 18' Detriots | Bluetooth | K&N Air Filter | Dancing Dials (Oh Yeah!)
| 1989 Porsche 944S2 Coupe| Guards Red| Leather| Sunroof| LSD
Volkswagen Fanatic
The optimal time to change something is when it needs changing, haha.
It's possible to use a calibrated refractometer to determine the coolant's concentration level. The dealer should have one that's specifically calibrated for G12 and G13 coolant.
Volkswagen use a lobrid coolant (OAT with small amounts of silicate, similar in principle to hybrid OAT) which has a very slow additive depletion rate, and has no specified replacement interval.
Unless specified, 5 years or 250 000 km seem to be figures bandied about in regards to such long-life coolant.
Last edited by Diesel_vert; 11-12-2013 at 09:53 AM.
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