Note: Use new head bolts and new gasket when installing camshaft housing, sealant will be required. The stated tightening torques only apply to the latest bolts available from Opel. Bolts of early types are tightened with a different force. Please consult with your supplier.
Removing
1. The cylinder head can be removed together with the manifolds, or the manifolds can be separated from the cylinder head before removing it, refer to Sections 4A, 4B or 4C.
2. Remove the timing belt and camshaft sprocket as described in Chapter 11.
3. Unscrew the two bolts securing the upper rear cover of the toothed drive belt to the camshaft housing (see illustration).
4. Disconnect the high voltage wires from the spark plugs, mark their location to make installation easier; remove the cover of the breaker-distributor, guided by Section 5.
5. Disconnect the hose from the fitting that connects the crankcase breather pipe to the camshaft housing. If necessary, remove the bolt securing the crankcase breather tube bracket to the end of the cylinder head.
6. Perform a proof test to ensure that all relevant hoses, pipes and wires are disconnected.
Installation
7. Proceed as described in Chapter 20, paragraphs 23-41 inclusive, but also note the following.
8. Ensure that all relevant hoses, pipes, wires, etc. were connected.
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