Plymouth manufactured a number of different engines in 1969, ranging from the 170- cubic-inch six-cylinder engine to the powerful eight-cylinder 440. All engines featured a single timing belt, sometimes referred to as a "chain," which ensures that the camshaft and the crankshaft rotate in unison. Over time, the chain stretches, and you'll need to replace it. The process for doing so is relatively straightforward, but it may take you several hours to complete the job.
Tools Used: Large container, Wrench, Standard screwdriver, Deep-set socket wrench, Vibration dampener puller kit, Timing chain cover gasket, Gasket sealant, Water pump gasket, Antifreeze
Replace Timing Belt
Removing the Timing Belt
Place a large container underneath the radiator. Loosen the petcock bolt at the base of the radiator with a wrench and allow the radiator fluid to drain. Tighten the bolt once the radiator is empty. Loosen the clamps that secure both radiator hoses to the radiator, using a standard screwdriver. Pull both hoses off the radiator.
Remove the bolts along both sides of the radiator with a wrench. Lift the radiator out of the engine bay. Slacken the adjustment bolts for the alternator and, if so equipped, for the power steering pump with a wrench to loosen the tension on the drive belts. Pull the belts off their pulleys. Remove the bolts that secure the fan blades to the water pump. Pull the fan blade assembly off the pump.
Remove the water pump's retaining bolts. Pull the water pump off the timing-chain cover. Unbolt the crankshaft pulley from the vibration dampener with a wrench. Pull the pulley off the dampener. Remove the bolt from the center of the crankshaft with a deep-set socket wrench.
Remove the vibration dampener with a dampener puller kit by following the manufacturer's instructions. Remove the timing-belt cover's retaining bolts with a wrench. Pull the cover off the engine to expose the timing belt.
Insert the crankshaft bolt into the center of the crankshaft. Turn the bolt in a clockwise direction with a wrench until the timing marks on the timing belt's two sprockets align. Each timing mark appears as a divot on one edge of each of the two sprockets. The timing marks are in alignment when the mark on the top sprocket points straight down and the mark on the bottom sprocket points straight up.
Remove the crankshaft bolt from the center of the crankshaft. Remove the lock bolt from the face of the top timing-belt sprocket with a wrench. Pull the top sprocket off the camshaft. Pull the bottom timing-belt sprocket off the crankshaft.
Installing the Timing Belt
Position the two timing belt sprockets on a flat surface. Rotate the sprockets until the timing marks align (see Step 11 in Section 1). Position the replacement timing belt around both sprockets. Pull the sprockets apart as far as the belt will allow.
Slide the chain with both sprockets onto the camshaft and the crankshaft at the same time. Make sure that the two timing marks still align. Install and tighten the lock bolt into the face of the top timing belt sprocket with a wrench.
Coat a new timing-belt cover gasket with gasket sealant. Press the gasket onto the back of the timing-belt cover. Position the timing-belt cover over the timing belt. Tighten the cover's retaining bolts with a wrench. Position the vibration dampener onto the end of the crankshaft. Install and tighten the crankshaft's single retaining bolt with a deep-set socket wrench.
Position the crankshaft pulley against the vibration dampener. Install and tighten the pulley's retaining bolts with a wrench. Coat a new water-pump gasket with gasket sealant. Press the gasket onto the back of the water pump.
Position the water pump on the face of the timing-belt cover. Install and tighten the pump's retaining bolts with a wrench. Position the fan-blade assembly on the tip of the water pump. Install and tighten the assembly's retaining bolts with a wrench.
Wrap the drive belt of the alternator and, if so equipped, the power-steering pump around the crankshaft pulley and around the alternator and the pulley of the power steering pump. Pull the belt-driven accessory away from the engine until its belt is tight. Tighten the accessory's adjustment bolts.
Lower the radiator into the engine bay. Install and tighten the radiator's mounting bolts with a wrench. Press the two radiator hoses onto the radiator. Tighten the two hose clamps with a standard screwdriver. Fill the radiator with antifreeze.
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