When to replace your hoses: We talk about cooling system problems every week, but they keep failing every week. If you have a vehicle that is more than 5 years old, you need to replace your hoses. Hoses deteriorate from the inside out so it is hard to spot a weak hose until it is about to blow. Most people just look at the big radiator hoses, but they aren’t usually the culprits that strand you. It’s usually the 6-10 other hoses that move coolant around the engine that can fail and leave you on the side of the road. Go ahead and bite the bullet and have them replaced to be on the safe side. I know that it it is a lot of work, but it might just save you the cost of an engine. Changing your coolant every 2 years will help these hoses last longer.