172 ENGINE 273 MPFI 8. Raise the engine speed to higher rpm, for quick warm-up and hold till radiator fan comes ON (caution: do not raise the engine speed to very high rpm), and then keep the engine in idle till radiator fan is switched OFF. Repeat the above radiator fan ON-OFF cycle once again. 9. Allow the engine to cool down close to ambient. Open the radiator cap and top up the coolant till top of the filler neck. Close radiator pressure cap completely i.e. up to the second step. Top up the coolant in the recovery bottle up to the NEW FILL / REFILL level, and fit back the recovery bottle cap.
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