The internal valves and pistons of your 1984 Honda Civic have external controls. The camshaft controls the opening and closing of the valves inside your engine as well as the movement of the pistons. In addition, the camshaft has a camshaft pulley on the front of the engine block, and another pulley beneath the camshaft pulley. These pulleys are linked by a toothed rubber and fiberglass timing belt. The timing belt synchronizes the camshaft and crankshaft. It is recommended that the timing belt on your 1984 Honda Civic be replaced every 90,000 miles.
Tools Used: Socket wrench, 1.0 mm socket, 1.25 mm socket, Piece of paper, Pencil, Pulley remover or brass hammer, New 1984 Honda Civic timing belt
Replace Timing Belt
Open the hood and use the appropriate socket wrench to loosen the adjuster bolt on the water pump pulley. Once the water pump is loose, slide the pump toward the engine block and finger-tighten the adjuster bolt. Work the water pump belt off its pulleys to remove it.
Use a 1.25 millimeter socket to remove the bolt in the middle of the crankshaft pulley. Pull the pulley toward the front of the vehicle to remove it.
Remove the timing gear cover. The timing belt has a metal cover with 1.0 millimeter mounting bolts. Remove them with a socket wrench and remove the cover. On a piece of paper write down the direction and route of the timing belt.
Locate the belt tensioner. In between the camshaft and crankshaft pulley is a small circular metal tensioner. The timing belt sits on the engine face and resembles the letter "P." The tensioner is located just underneath the enclosed part of the P and does not touch the teeth of the belt. There is a 1.25 millimeter adjustment bolt in the center of the tensioner. Loosen the bolt with a socket wrench until the timing belt can be worked off the engine. Remove the belt.
Check to make sure the camshaft and crankshaft pulleys are at top dead center, or TDC. The camshaft will have two scores on it that will line up evenly with the top of the engine block behind it. The crankshaft pulley will have a score on it that corresponds to a score on the engine block underneath it. Turn the pulleys with your hand until they are at TDC.
Feed the timing belt onto the gears of the camshaft and crankshaft pulleys. Be careful to keep the pulleys at TDC.
Use a 1.25 millimeter socket wrench to turn the crankshaft pulley one-quarter turn counterclockwise. Three teeth of the timing belt should turn on the gears. Tighten the tensioner with the same socket wrench.
Replace the timing belt cover and water pump belt. Close the hood.
Tips & Warnings
Do not bend or get any oil on the new timing belt.
Installing a timing belt improperly will cause sever internal damage to your engine when started.
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