2. Disconnect the negative cable from the battery.
3. Drain the cooling system (see Chapter 1).
4. Check for marks on all wires, control cables and tubes connecting the intake manifold to the vehicle body.
5. On carburetor models, remove the two bolts securing the brackets to the manifold and all nuts securing the manifold to the head. Remove the manifold.
Fig. 5.5 Assembly of a typical intake manifold (carburetor models)
6. On models with petrol injection, a manifold consisting of two parts is installed. Unscrew the bolts securing parts A and B of the manifold, remove part B.
Fig. 5.6 Assembling the intake manifold (gasoline injection engines)
7. Loosen the nuts securing part A of the manifold to the cylinder head and remove part A.
8. Thoroughly clean the mating surfaces of the manifold (and its parts) and the cylinder head from the remains of the old gasket. When installing a new manifold, all removable parts belonging to the manifold must be installed from the old manifold.
9. When installing the manifold, use a new gasket. Tighten the mounting nuts from the center to the periphery, the tightening torque is specified in specifications to this Chapter.
10. On petrol injection models, install manifold part B with a new gasket. Tighten the nuts from the centre out to the periphery to the torque specified in the specification.
11. Install the removed parts in the reverse order of removal. The tightening torques for threaded connections are specified in the specification.
12. Fill with coolant.
13. Start the engine and check for leaks and proper operation of the systems.