Part Two
Valve Guide Replacement
40. Crankshaft Pulley
1. Hold the pulley with the holder handle (A) and the crankshaft pulley holder (B).
2. Remove the bolt with a socket, 19 mm (C) and a breaker bar.
3. Remove the crankshaft pulley.
41. Engine Jack Support (State Of A Low Vehicle)
1. Lift and support the engine with a jack and a wood block under the oil pan.
42. Mounting Bracket, Engine Side
1. Remove the ground cable (A), the side engine mount bracket (B), and the side engine mount (C).
43. Engine Oil Pump Assembly
1. Disconnect the PCV hose.
2. Remove the oil pump.
44. Cam Chain Auto-Tensioner
1. Measure the tensioner rod length between the tensioner body and bottom of the flat surface section on the tensioner rod. If the length is more than the service limit, replace the cam chain.
2. Loosely install the crankshaft pulley.
3. Turn the crankshaft counterclockwise to compress the auto-tensioner.
4. Rotate the crankshaft counterclockwise to align the holes on the lock (A) and the auto-tensioner (B).
5. Insert a 1.0 mm (1/32 in) diameter pin (C) into the holes.
6. Turn the crankshaft clockwise to secure the pin.
NOTE: If the holes in the lock and the auto-tensioner do not align, continue to rotating the crankshaft counterclockwise until the holes align, then install the pin.
7. Remove the cam chain auto-tensioner.
8. Remove the crankshaft pulley.
45. Cam Chain
1. Remove the cam chain guide (A) and the cam chain tensioner arm (B).
2. Remove the cam chain.
46. Cylinder Head Assembly
1. Remove the cylinder head bolts. To prevent warpage, loosen the bolts in sequence, 1/3 turn at a time, repeat the sequence until all bolts are loosened.
2. Remove the cylinder head.
47. Rocker Arm Assembly
1. Loosen the locknuts and the adjusting screws (A).
2. Remove the lost motion holder bolts. To prevent damaging the lost motion holder and the rocker shaft.
3. loosen the bolts, in sequence, two turns at a time.
4. Remove the lost motion holder (A) and the lost motion assemblies (B).
5. Remove the rocker arm assembly (C).
6. Remove the oil control orifice (D).
48. Camshaft Sprocket
1. Hold the camshaft with a 27 mm open-end wrench.
2. loosen the camshaft sprocket mounting bolt.
3. Remove the camshaft sprocket.
49. Camshaft
1. Remove the camshaft thrust cover (A).
2. Pull out the camshaft (B).
50. Valve Spring
1. Using an appropriate-sized socket (A) and a plastic mallet (B), lightly tap the spring retainer to loosen the valve cotters.
2. Install the valve spring compressor attachment and the valve spring compressor.
3. Compress the valve spring and remove the valve cotters.
4. Remove the valve spring compressor and the valve spring compressor attachment.
5. Remove the spring retainer, the valve spring, and the valve.
51. Valve Seal
1. Install the valve guide seal remover (A).
2. Remove the valve seal.
52. Valve Guide
1. As illustrated, use a commercially available air-impact valve guide driver (A) modified to fit the diameter of the valve guides. In most cases, the same procedure can be done using the valve guide driver, 5.35 x 9.7 mm and a conventional hammer.
2. Select the proper replacement guides, and chill them in the freezer section of a refrigerator for at least an hour.
3. Use a hot plate or oven to evenly heat the cylinder head to 300 °F (150 °C). Monitor the temperature with a cooking thermometer. Do not get the head hotter than 300 °F (150 °C); excessive heat may loosen the valve seats.
4. Working from the camshaft side, use the driver and an air hammer to drive the guide about 2 mm (0.08 in) towards the combustion chamber. This will knock off some of the carbon and make removal easier. Hold the air hammer directly in line with the valve guide to prevent damaging the driver. Wear safety goggles or a face shield.
5. Turn the head over, and drive the guide out toward the camshaft side of the head.
6. If a valve guide will not move, drill it out with an 8mm (5/16 in) drill bit, then try again.
NOTE: Drill guides only in extreme cases; you could damage the cylinder head if the guide breaks.