Replacing the lower radiator house and realized the old hose has a spring inside, but the new hose didn't come with one. Should I not worry with the spring and install new house with out? Also what I'd the purpose behind having the spring in the factory hose? There isn't one inside the upper radiator hose. The guy from auto zone said I didn't need the spring but I thought it was too keep the line from caving in from the water pump.