Most engine repair procedures can be performed without removing the power unit.
Before starting any procedures, pressure wash the engine compartment and the outer surfaces of the engine. This will make work easier and prevent engine contamination. Do not point the washer nozzle directly at electrical connectors. Many of these relate to the electronic circuit, and if water gets under the seals, it can cause sensor failure or corrosive deposits to form in circuit connections.
It may be necessary to remove the hood cover to provide improved access to the engine during repairs (see chapter 11).
Procedures such as replacing oil seals and gaskets, lubrication or cooling system hoses, and exhaust system components can be performed without removing the engine. You can replace the intake and exhaust manifold gaskets, the front housing gasket, the engine pan, as well as the crankshaft seals and the cylinder head gasket without removing the engine from the engine compartment.
External elements (intake and exhaust manifold, engine sump, oil pump, cooling system pump, starter, generator and fuel equipment) They can also, if necessary, be removed for repair from the engine located in the engine compartment.