Timing Chain & Sprockets Replacing procedure is as follows :----
Timing Chain & Sprockets
REMOVAL & INSTALLATION instructions are given below:----
3.0L Engines
3.8L Engine
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Timing Chain & Sprockets
REMOVAL & INSTALLATION instructions are given below:----
3.0L Engines
- Before servicing the vehicle, refer to the precautions at the beginning of this section.
- Remove or disconnect the following:
Negative battery cableCoolantAccessory drive beltsIdler pulley or automatic tensioner, as necessaryLower radiator hose and the heater hose from the water pump and front coverCrankshaft pulley and damperOn flexible fuel vehicles, the CKP sensorEngine oilOil panIf necessary, the water pump pulley bolts, then remove the pulleyBolts from the timing cover to the cylinder blockTiming cover - Tap the seal out of the cover with a seal driver.
- Remove the crankshaft damper and timing chain front cover.
- Rotate the crankshaft until the No. 1 piston is at TDC of its compression stroke and the timing marks are aligned.
Fig. Be sure the timing marks are facing each other after the chain has been installed-3.0L (OHV) engine - Remove the camshaft sprocket attaching bolt and washer. Slide both sprockets and timing chain forward and remove as an assembly.
- Check the timing chain and sprockets for excessive wear. Replace if necessary.
To install:
- Before installation, clean and inspect all parts. Clean the gasket material and dirt from the oil pan, cylinder block and front cover.
- Slide both sprockets and timing chain onto the camshaft and crankshaft with the timing marks aligned. Install the camshaft bolt and washer and tighten to 46 ft. lbs. (63 Nm). Apply clean engine oil to the timing chain and sprockets after installation.
NOTEThe camshaft bolt has a drilled oil passage in it for timing chain lubrication. Prior to installation, clean the passage and be sure it is clear. Never replace the camshaft bolt with a standard bolt. - Lightly oil all bolt and stud threads except bolts 1, 2 and 3 that require a suitable pipe sealant.
- Install or connect the following:
New seal in the timing coverNew timing cover gasket over the cylinder block dowelsTiming cover/water pump assembly onto the cylinder block with the water pump pulley loosely attached to the water pump hub - Apply a non-hardening sealant to bolt numbers 1, 2 and 3 and hand start them along with the rest of the cover bolts. Tighten bolts 1-10 to 19 ft. lbs. (25 Nm) and bolts 11-15 to 84 inch lbs. (10 Nm).
- Install or connect the following:
Engine oil pan. Tighten the bolts to 108 inch lbs. (12 Nm).Water pump pulley bolts, hand-tightCrankshaft damper and pulley. Tighten the damper bolt to 107 ft. lbs. (145 Nm).On flexible fuel vehicles, the CKP sensor. Tighten the bolt to 44-61 inch lbs. (5-7 Nm).Automatic belt tensioner or idler pulley, as necessaryWater pump and accessory drive belts. Tighten the water pump pulley bolts to 16 ft. lbs. (21 Nm).Lower radiator hose and the heater hose and tighten the clampsEngine oilCoolantNegative battery cable
- Before servicing the vehicle, refer to the Precautions section.
- Remove or disconnect the following:
NOTEIf the crankshaft pulley and vibration damper have to be separated, mark the damper and pulley so they may be reassembled in the same relative position. This is important as the damper and pulley are initially balanced as a unit. If the crankshaft damper is being replaced, check if the original damper has balance pins installed. If so, new balance pins must be installed on the new damper in the same position as the original damper. The crankshaft pulley, new or original, must also be installed in the same relative position as originally installed.
NOTEThe front cover cannot be removed without lowering the oil pan.
NOTEDo not overlook the cover retaining bolt located behind the oil filter adapter. The front cover will break if pried on, and all retaining bolts are not removed.
NOTEThe front cover contains the oil pump, water pump and crankshaft seal. If a new front cover is to be installed, remove the water pump and oil pump from the old front cover and install them on the new cover along with a new crankshaft seal.
NOTEIf the crankshaft sprocket is difficult to remove, pry the sprocket off the shaft using a pair of large prybars positioned on both sides of the sprocket.
Negative battery cableCoolantAir cleaner assembly and air intake ductFan/clutch assembly and shroudAccessory drive belt idlers, drive belts and the water pump pulleyPower steering pump bracket retaining bolts. Leaving the hoses connected, place the pump/bracket assembly aside in a position to prevent fluid from leaking out.Compressor front support bracket but leave the compressor in placeCoolant bypass hose and heater hose at the water pumpUpper radiator hose at the thermostat housingCoil wire from the distributor capCap with the secondary wires attachedDistributor hold-down clamp and lift the distributor out of the front coverCrankshaft damper and pulley
Oil filterLower radiator hose at the water pumpOil pan
Front cover retaining bolts. It is not necessary to separate the water pump from the front cover.
Front cover and water pump as an assembly. Drive the crankshaft seal out of the front cover with a suitable seal driver. Remove and discard the cover gasket.
Camshaft bolt and washer from the end of the camshaftDistributor drive gear, camshaft sprocket, crankshaft sprocket and timing chain
To install:
- Clean all gasket mating surfaces. If reusing the front cover, replace the front cover oil seal.
- If removed, install the timing chain vibration damper. Tighten the mounting bolts to 71-123 inch lbs. (8-14 Nm).
- Rotate the crankshaft to position the No. 1 piston at TDC and the crankshaft keyway at the 12 o' clock position.
- Lubricate the timing chain with engine oil.
- Install or connect the following:
Camshaft sprocket, crankshaft sprocket and timing chain. Be sure the timing marks align.Distributor drive gear. Install the bolt and washer assembly on the end of the camshaft and tighten to 30-37 ft. lbs. (40-50 Nm).New crankshaft seal in the front cover and lubricate the seal lip with engine oilNew gasket on the cylinder block and install the front cover using dowels for proper alignment. Install the front cover retaining bolts and tighten to 15-22 ft. lbs. (20-30 Nm).Oil panLower radiator hoseOil filter - Coat the crankshaft damper sealing surface with clean engine oil. Apply a small amount of silicone sealer to the crankshaft keyway.
- Position the crankshaft pulley key in the crankshaft keyway and install the damper, using a suitable installation tool.
- Install or connect the following:
Damper washer and retaining bolt and tighten to 103-132 ft. lbs. (140-180 Nm).Crankshaft pulley and tighten the retaining bolts to 20-28 ft. lbs. (26-38 Nm).Coolant bypass hoseDistributor with the rotor pointing at the No. 1 distributor cap towerDistributor cap and coil wireUpper radiator hose at the thermostat housingHeater hoseCompressor and mounting brackets. Tighten the retaining bolts to 30-45 ft. lbs. (41-61 Nm).Power steering pump and mounting bracket. Tighten the retaining bolts to 30-45 ft. lbs. (41-61 Nm).Water pump pulley. Position the accessory drive belts over the pulleys.Fan/clutch assembly and fan shroud. Cross-tighten the fan/clutch assembly retaining bolts to 12-18 ft. lbs. (16-24 Nm). - Fill the crankcase with the proper type and quantity of engine oil. Fill and bleed the cooling system. Connect the negative battery cable.
- Start the engine and check for leaks. Check the ignition timing and curb idle speed and adjust, as necessary.
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Nice explanation. Read about Ford 302 Thermostat Housing engine here.
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