Give those coolant hoses a squeeze to expose any cracks and hardness. Check all accessible gaiters and rubber covers for splits, too. There’s a reason why condoms have a use-by date. The same should go for rubber items on a car, as they could have similarly costly consequences. Coolant hoses, especially natural rubber products, often lose their suppleness over time, meaning that their ability to take the flex between a vibrating engine and a relatively solidly-mounted radiator will be impaired. The same goes for their abilities to expand and contract with fluctuations in coolant temperature. Brittle hoses can rupture unexpectedly, with consequent loss of coolant and potential engine seizure. Driveshaft and steering gaiters suffer in much the same way, splurging out lubricant and leaving vital joints dry.