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Swollen sections on radiator hoses indicate oil or grease contamination. Decaying hose particles can float into the radiator and clog it.
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After draining and containing the coolant, loosen the clamps and replace the hoses. Over-tightening the clamps can cause premature wear where the metal meets the rubber.
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On this Chevy pickup, the belt-routing decal is located on the upper radiator support.
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To replace a serpentine belt, loosen both the tensioner and idler pulley. Remove the old belt, route the new one following the diagram and retighten the tensioner and pulley bolts.
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Make sure the new air-filter element seats properly and the housing's lid is tightly secured by its clamps or wingnuts.
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Carefully pull the PCV valve out of the valve cover without damaging the grommet. Pull the other end out of the air-cleaner return hose and swap in the new PCV valve.
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The EGR valve is operated by engine vacuum. Replacement EGRs cover many applications, and their instructions detail which washer thickness is required for each vehicle. Chevy TBI EGR replacement involves a vacuum hose and two bolts behind the throttle body as well as a gasket.
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Distributor caps and rotors become corroded as they age. New Borg-Warner comparison parts are on the left, respectively.
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On many late-model Chevys, the distributor is next to the firewall. The cap is secured to the distributor with either spring clips or Phillips screws. Replace wires one at a time when changing the cap.
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The new rotor simply clicks onto the distributor shaft after the old one is pulled off.
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Always check the spark plug gap for your application. Parts stores will write the spec on the box, but it can't hurt to verify the gap. Plug pliers (right) are handy, but they aren't recommended for platinum-tipped plugs.
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A piece of 3/8-inch rubber hose can help when threading new plugs into hard-to-reach spots. Spark-plug sockets have protective lining that minimizes the chances of cracking a plug while tightening it.
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Plug wires are weakest at their boots, so remove them with care. A left and right twist before pulling will help. (Better yet, use a special tool designed solely for this purpose.) Replace one at a time to maintain correct firing order.
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The oxygen sensor installs similar to a spark plug. (The sensor's wiring plug isn't visible here.)
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Fuel filter replacement is crucial but messy. For filters that are mounted to steel lines, use two wrenches per side to prevent against snapping a line.
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