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Camshaft oil seals - renewal
In-car engine repair procedures / Camshaft oil seals - renewal


Note: While it is possible to reach either oil seal, once the respective toothed pulley has been removed (see Section 11) to allow the seal to be prised out, this procedure is not recommended. Not only are the seals very soft, making this difficult to do without risk of damage to the seal housing, but it would be very difficult to ensure that the valve timing and the timing beltТs tension, once disturbed, are correctly reset. Owners are advised to follow the whole procedure outlined below.

1 Release the tension from the timing belt as described in Section 10, paragraphs 1 to 14.

Note: If the timing belt is found to be contaminated by oil, remove it completely as described, then renew the oil seal (see below).

Wash down the engine timing belt area and all related components, to remove all traces of oil. Fit a new belt on reassembly.

2 If the timing belt is still clean, slip it off the toothed pulley, taking care not to twist it too sharply; use the fingers only to handle the belt. Do not rotate the crankshaft until the timing belt is refitted. Cover the belt, and secure it so that it is clear of the working area and cannot slip off the remaining toothed pulley.

3 Unfasten the pulley bolt and withdraw the pulley (see Section 11).

4 Unbolt the camshaft right-hand bearing cap, and withdraw the defective oil seal.

Clean the seal housing, and polish off any burrs or raised edges, which may have caused the seal to fail in the first place.

5 To fit a new seal, Ford recommend the use of their service tool 21-009B, with a bolt (10 mm thread size, 70 mm long) and a washer, to draw the seal into place when the camshaft bearing cap is bolted down; a substitute can be made using a suitable socket (see illustration). Grease the seal lips and periphery to ease installation, and draw the seal into place until it is flush with the housing/bearing cap outer edge. Refit the bearing cap, using sealant and tightening the cap bolts as described in Section 13.

12.5 Using socket and toothed pulley bolt to install camshaft oil seal
12.5 Using socket and toothed pulley bolt to install camshaft oil seal

6 For most owners, the simplest answer will be to grease the seal lips, and to slide it on to the camshaft (until it is flush with the housingТs outer edge). Refit the bearing cap, using sealant and tightening the cap bolts as described in Section 13 (see illustration).

Take care to ensure that the seal remains absolutely square in its housing, and is not distorted as the cap is tightened down.

12.6 Alternatively, seal can be inserted when camshaft bearing cap is
12.6 Alternatively, seal can be inserted when camshaft bearing cap is unbolted

7 Refit the pulley to the camshaft, tightening the retaining bolt loosely, then slip the timing belt back onto the pulley (refer to paragraphs 18 and 21 of Section 10) and tighten the bolt securely.

8 The remainder of the reassembly procedure, including checking the camshaft alignment (valve timing) and setting the timing belt tension, is as described in paragraphs 22 to 27 of Section 10.


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