V-belt breakage
If you continue driving after a V-belt breaks and, accordingly, with a non-working coolant pump, you risk seriously damaging the engine! Although cold coolant is heavier than warm, without a coolant pump, circulation is very slow and will not be enough to fully cool the engine. How to install a new V-belt, you can read in the section Generator.
Note: Recommendation: since driving with a torn V-belt on a Renault 19 is impossible, you should always have a spare belt in the car.
Source link is located on www.RENAULTBOOK.ru
