It goes without saying that there are thousands of different tools for working on cars – but for the majority of the jobs you can undertake at home you don't actually need that many.
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A water pump is vital to a car engine’s operation because it ensures the coolant keeps moving through the engine block, hoses and radiator, and maintains an optimum operating temperature. It is driven by a serpentine belt (aka accessory belt or auxiliary belt) from the crankshaft pulley.
Bleed screws have numerous applications, including on household central heating radiators. Bleed screws also abound on cars, where they are used on the engine itself, plus the radiator and the braking system