Convert a Timing Chain for a 302
Unlike most advanced engines, the 302 was never equipped with overhead camshafts. The camshaft was instead inserted complete the centre of the block and a timing chain was used. The dream of a timing chain is to associate the engine's crankshaft to its camshaft, and to assure that both components spin in a precise sequence. Over continuance, the chain stretches, moulding it onerous to locate the ignition timing. Happily, being the 302's distributor does not chalk up to be removed, replacing the timing chain on a 302 is easier than on many other types of engines.
Instructions
1. Withdraw the antifreeze from the radiator by removing the petcock plug at the representation of the radiator with a wrench. Tighten the plug into the radiator once the radiator has finished draining.
2. Remove the vibration dampener from the crankshaft. Remove the unmarried bolt located in the centre of the dampener, then bolt a vibration dampener puller to the dampener with the bolts supplied with the puller utensils. Rotate the threaded rod in the centre of the puller in a clockwise order with a wrench until the dampener detaches from the crankshaft.
3. Disconnect the backside radiator hose, the heater hose and the intake manifold hose from the inundate pump. Everyone hose connects to the irrigate pump with a band clamp secured with a screw. Twist Everyone screw in a counterclockwise succession with a screwdriver, then pull the three hoses off of the irrigate pump.
4. Remove the inundate pump and the timing chain encompass. Remove the bolts that secure the dilute pump to the timing chain include with a wrench, then pull the saturate pump off of the encompass. The timing chain comprehend is besides held in country with diverse retaining bolts. Notice that four of the embrace's bolts enter the backside of the subsume finished the front of the oil pan. Remove Everyone bolt and pull the incorporate off of the engine to expose the timing chain.
5. Turn the crankshaft until the two marks on the timing chain's gears ally. Removing the timing chain with the gears in alignment Testament avoid having to allot the engine's ignition timing following. A tiny circle has been stamped into one wrinkle of Everyone timing chain gear. The marks are in alignment when the stop on the larger gear is in the six o'Watch position and the objective on the smaller gear is in the twelve o'Watch position. Involve the bolt used to secure the vibration dampener to the crankshaft into the gratuity of the crankshaft, then turn the bolt in a clockwise circuit to rotate the gears.
6. Remove the oil thrower call from the crankshaft and the fuel pump eccentric from the camshaft. The timing chain cover must be installed first, as the water pump bolts to the front of the timing chain cover. Install both components with new gaskets coated with gasket sealer.10. This portion is called a fuel pump eccentric, and is used to function the fuel pump. Remove the unmarried bolt located in the centre of the eccentric, then pull the eccentric off of the timing chain gear.
7. Remove the timing chain. The bolt used to secure the fuel pump eccentric to the upper timing chain gear besides held the upper timing chain gear to the camshaft. Owing to the eccentric has already been removed, simply pull the upper timing chain gear off of the camshaft. With the upper timing chain gear removed, the chain Testament activity slack. Pull the lower timing chain gear off of the crankshaft.
8. Install the advanced timing chain. Seperate the replacement timing chain from its upper and lower sprockets. Slide the lower timing chain gear onto the gratuity of the crankshaft. Message that the gratuity of the crankshaft features a raised metal portion that extends down the length of the crankshaft. This metal quota is designed to slide on ice a tiny cutout within the lower timing chain gear. Position the lower timing chain gear onto the gratuity of the crankshaft, then rotate the gear until its slot slides over the raised metal quota on the crankshaft. Wrap the timing chain approximately the lower gear, then onto the upper gear. Constitute trustworthy that the immature circle on the upper timing chain gear is at the six o'Watch position. Position the upper timing chain gear onto the gratuity of the camshaft, then install the fuel pump eccentric with its bolt into the centre of the upper timing chain gear to secure the timing chain assembly in place. Slide the oil thrower ring onto the tip of the crankshaft.
9. Install the timing chain cover and the water pump. Surrounding the gratuity of the crankshaft is a thin metal disk, called an oil thrower call. Slide the bell off of the crankshaft. Bolted to the centre of the camshaft's timing chain gear, which is the larger of the timing chain's two gears, is a Hand-bill metal plenty all over two inches in breadth.
The dampener is installed similarly to the lower timing chain gear. Like the lower timing chain gear, the dampener also features a slot that slides over the metal pin on the tip of the crankshaft. Twist the dampener until it aligns with the pin, then install the dampener's retaining bolt with a wrench.12.
Connect the radiator hose, the intake manifold hose and heater hose to the water pump. Slip each hose onto its respective fitting on the water pump, then tighten the three hose clamps with a screwdriver.11. Install the vibration dampener onto tip of the crankshaft.
Fill the radiator with a 50/50 mixture of new antifreeze and water.
