Coolant and Heating running temperatures

Petrol engines

Grun: Haynes says thermostat fully open at 105 celsius.

Bentley says:

Begins opening at 85 C

Fully open 105C

Stroke 8mm minimum

Radiator fan, carburettor engines:

1st speed cuts in at 93 to 98 C

cuts out at 88 to 93 C

2nd speed cuts in 99 to 105 C

cuts out at 91 to 97 C

Fuel injection engines:

1st speed cuts in at 89 to 94 C

cuts out at 81 C

2nd speed cuts in at 95 to 100 C

cuts out at 87 C

Thermostat switch tightening torque - 30 nm (22 ft lb)

Diesel engines

(CS 1.6NA)

Coolant capacity 16 litres

1st speed cuts in at 93 to 98 C

cuts out at 88 to 93 C

2nd speed cuts in at 100 to 105 C

cuts out at 95 to 100 C

Thermostat:

Opening begins: approx 85C

Fully Open 105C

Stroke Min. 7mm

G11 phosphate free anti-freeze

Now G12 (pink) or G12 + (purple)