Fig. 2.95. Camshafts of a 1.8 L engine
The camshafts of the 1.8 L engine are shown in Fig. 2.95.
Removal
Disconnect the positive crankcase ventilation valve hose and vent hose.
Fig. 2.96. Removing the coolant pump pulleys and crankshaft
Remove the coolant pump pulley and the crankshaft pulley (Fig. 2.96).
Remove the timing belt cover.
Loosen the timing belt tensioner pulley bolts, loosen the belt tension and temporarily secure the tensioner pulley.
Remove the timing belt from the camshaft sprocket.
Loosen the bolts securing the center cover and then remove the cover.
Remove the ignition coils as an assembly.
Fig. 2.97. Cylinder head cover
Loosen the cylinder head cover mounting bolts and then remove the cover (Fig. 2.97).
Remove the camshaft sprocket.
Fig. 2.98. Removing the camshaft bearing caps
Remove the camshaft bearing caps and timing chain (Fig. 2.98).
Remove the camshafts.
Remove the hydraulic lifters.
Examination
Check the camshaft journals for wear. If the journals are significantly worn, replace the camshaft.
Fig. 2.99. Checking the protruding part of the camshaft cams
Check the protruding portion of the camshaft lobes for damage. If the camshaft lobes are damaged or their wear exceeds the permissible value, replace the camshaft (Fig. 2.99).
Camshaft cam height
Nominal value:
- intake: 44.82 mm;
- outlet: 44.72 mm.
Maximum permissible value:
- intake: 44.72 mm;
- outlet: 44.62 mm.
Inspect the camshaft lobes rear surface for damage or significant wear and replace if necessary.
Check the condition of the camshaft bed for any damage. If the camshaft bed is worn beyond the permissible limit, replace the cylinder head assembly or camshaft bearing covers.
- Axial clearance of the camshaft: 0.1–0.2 mm
Checking the camshaft seal
Check the seal lip for wear. If the lip is worn, replace the seal.
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Check the condition of the camshaft surface that contacts the seal lip. If the surface is worn, replace the camshaft.