The additional and main mufflers with a bellows are made as a single element.
Fig. 5.13. Exhaust system: 1 – oxygen concentration control sensor; 2 – catcollector; 3 – diagnostic oxygen concentration sensor; 4 – nuts; 5 – gasket; 6 – intake pipe; 7 – bellows; 8, 10, 11, 13 – exhaust system suspension cushions; 9 – additional muffler; 12 – main muffler
Note: Ford Fusion vehicles with a 1.4L engine do not have an additional muffler installed.
There are two oxygen concentration sensors installed on the catalytic converter: diagnostic and main (control).
A metal-reinforced sealing gasket is installed between the cylinder head and the exhaust manifold flange, which is common with the intake pipe.
The inlet pipe of the additional muffler is connected to the exhaust manifold via a metal-reinforced gasket.
To reduce the transmission of vibration from the power unit to the exhaust system and body, a vibration-compensating corrugated bellows in a metal braid is mounted in the inlet pipe of the additional muffler.
The exhaust manifold is secured with nuts to the cylinder head studs and is additionally secured with a bracket to the engine.
The exhaust system elements are suspended from the body on three rubber cushions of identical shape but different rigidity…
…and one original rear mount cushion for the main muffler.
To protect the engine and the body base from heating by the exhaust system elements, steel heat shields are installed in front of the exhaust manifold above the additional and main mufflers. In addition, an additional heat-insulating shield is installed in the engine compartment to protect the steering mechanism from overheating.
The exhaust system does not require special maintenance. It is enough to periodically check the reliability of tightening of threaded connections and the integrity of suspension cushions. In case of damage to system elements, through corrosion or burnout, they are replaced.
Note: Check the exhaust system periodically. If the exhaust system is noisy, check for leaks. To do this, start the engine and inspect the entire system. By running your hand over the possible leaks without touching the components, you will immediately feel the gas leak. If necessary, replace rusted and burnt components.
Caution! Allow the exhaust system to cool down before repairing it, as it reaches high temperatures during engine operation.
Warning! Exhaust gases are toxic, poisoning occurs unnoticed, so before starting the engine in the garage, be sure to open the gate!
Note: If it is not possible to replace the defective unit with a new one, you can temporarily restore its functionality by applying a metal patch to the damaged area and securing it with clamps or wire. It is recommended to place a sheet of asbestos under the patch.
Note: Auto parts stores also sell special exhaust system restoration kits that can be used to temporarily repair system damage to get to a service station or garage.
The original source of this article can be found at: Fordbook.ru