Contents: Removal ↡ Installation ↡
Removal
1. Raise the front of the vehicle and support it on stands (see "Lifting the car and placing it on supports").
2. Loosen the nuts of the brackets securing the exhaust pipe to the mounting bracket on the gearbox (see fig. 4.2).
Fig. 4.2. Loosen the nuts securing the intake pipe to the bracket (shown by arrows)
3. Loosen the bolts securing the bracket to the gearbox and remove the bracket (see fig. 4.3).
Fig. 4.3. Unscrew the bolts (shown by arrows) bracket mounts to gearbox
4. On 6-cylinder petrol models, remove the bolts and heat shield from the bottom of the manifolds.
5. Support the exhaust pipe on a movable jack, then loosen and unscrew the bolts securing the exhaust pipe to the manifold.
6. Lower the jack to disconnect the connection between the downpipe and manifold and remove the gaskets.
7. Where provided, to improve access to components, remove the air cleaner - refer to the relevant part Chapters 4.
8. Loosen and remove the nuts that secure the exhaust manifold to the cylinder head. Where provided, remove the bolts and remove the upper section of the guide tube from the engine, noting the location of the clamp (see Fig. 4.8, a-c). On models equipped with an additional air intake, unbolt and remove the air intake nozzle from the exhaust manifold and move the air tube to the side.
Fig. 4.8, a. Unscrew the fastening nut (shown by arrow) dipstick tubes to the engine
Fig. 4.8, b. Upper exhaust manifold mounting nuts (shown by arrows)...
Fig. 4.8, c....and lower fastening nuts (shown by arrows)
9. On models equipped with an exhaust gas recirculation system, unscrew the bolts and remove the EGR valve and system pipes from the manifold.
10. Remove the manifold from the cylinder head studs and remove the gasket. Note that on 6-cylinder engines, the exhaust manifold is divided into two halves. To allow the manifold to be separated during removal, loosen the clamps on the connecting pipes.
Installation
11. Installation is carried out in reverse order, taking into account the following points.
- a) Thoroughly clean the mating surfaces of the manifold and cylinder head, being careful not to scratch them.
- b) On 6-cylinder engines, where separate gaskets are installed on each individual exhaust port, the gasket surface with the bend must face the manifold. Note that the gasket for the 6th cylinder has an additional hole).
- c) Use new manifold mounting nuts.