2B-10 Chapter 2 Part B 2.OL and 2.4L four-cylinder engines
8.30 Squeeze thetiming belt and case and observe the distance
between the belt and Line C to measure the belt deflection
9.2 Carefully pry the seal out with a small screwdriver
10.12 Measure the camshaft lobe heights
10.13 Measure the camshaft journal diameters
30 if it is too tight or too loose, loosen the tensioner bolts and adjust the
tensioner. Squeeze the timing belt and the cover (see i~&~tration), and
measure the distance between the timing belt and Line C. The distance
should be approximately 9/16-inch.
31 Tighten the tensioner bolts to the torque listed in this Chapter’s Speci-
fications, starting with the adjustment bolt; then tighten the bolt which goes
through the tension spring.
32 Reinstall the remaining parts in the reverse order of removal. Note
that the timing belt cover bolts come in different lengths.
33 Start the engine, set the ignition timing (see Chapter 1) and road test
the vehicle.
9 Crankshaft front oil seal - replacement
Refer to illustration 9.2
1 Removethetimingbelt,SilentShaftbeRandthecrankshaftsprockets
(see Section 8).
2 Wrap the tip of a small screwdriver with tape. Working from below the
left inner fender, use the screwdriver to pry the seal out of its bore (sea
fliustratlon). Take care to prevent damaging the crankshaft and the seal
bore.
3 Thoroughly clean and inspect the seal bore and sealing surface on
the crankshaft. Minor imperfections can be removed with emery cloth. If
there is a groove worn in the crankshaft sealing surface (from contactwfth
the seal), installing a new seal will probably not stop the leak. Such wear
normally indicates the internal engine components are also worn. Consfd
er overhauling the engine.
4 Lubricate the new seal with engine oil and drive the seal into place
with a hammer and socket.
5 Reinstall the sprockets, the timing belt, the Silent Shaft belt and re-
lated components as described in Section 8.
6 Run the engine and check for oil leaks.
10 Camshaft - removal, inspection and instafiation
Removal
1
Position the number one piston at Top Dead Center (see Section 3).
2 Disconnect the negative cable from the battery.
3 Remove the valve cover (see Section 4).
4 Remove the distributor (see Chapter 5).
5 Drain the cooling system (see Chapter 1) and disconnect the upper
radiator hose from the thermostat housing.
6 Remove the fuel pump (carbureted models only) (see Chapter 4).
7 Remove the timing belt and camshaft sprocket (see Section 8).
8 Detach the rocker arm assembly (see Section 5).
9 Lift the camshaft from the cylinder head (see illustration 4.5).
Inspection
RBfer to illustrations 70.12, IO. 13 and 10.15
10 Thoroughly clean the camshaft and the gasket surfaces.
11 Visually inspect the camshaft for wear and/or damage to the distribu-
tor drive gear, lobe surfaces, bearing journals and seal contact surfaces.
Visually inspect the camshaft bearing surfaces in the cylinder head for
scoring and other damage.
12 Measure the camshaft lobe heights (see illustration) and compare
them to this Chapter’s Specifications.
13 Measure the camshaft bearing journal diameters (see illustration),
then measure the inside diameter of the camshaft bearing surfaces in the
cylinder head, using a telescoping gauge (you’ll have to reinstall the cam-
shaft bearing caps). Subtract the journal measurement from the bean’ng
measurement to obtain the camshaft bearing oil clearance. Compare this
clearance with this Chapter’s Specifications.
14 Replace the camshaft if it fails any of the above inspections. Note: If
the distributor drive gear is faulty, replace the driven gear also. If the lobes
are worn, replace the rocker arms along with the camshaft. Cylinder head
replacement may be necessary if the camshaft bearing surfaces in fhe
head are damaged or excessively worn.
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