Attention: This section describes some maintenance procedures and engine repairs that can be performed without removing the engine from the vehicle.
Flush the engine compartment and engine exterior with a suitable degreaser before doing any work. This will make the job easier and help prevent dirt from entering the internal cavities of the engine.
Depending on which components you intend to remove/repair, it may be useful to remove the hood to allow easier access to the engine as the repair operation progresses. Cover the wings with something to avoid damaging the painted surfaces. Special coverings are available, however, old bedspreads or blankets may work just fine for this purpose.
If leaks occur in the vacuum, exhaust, oil or cooling systems, leading to the need to replace gaskets or seals, most of the required operations can be performed with the engine in the car. The intake and exhaust manifold gaskets, crankcase gasket, camshaft oil seals and cylinder head gasket are relatively easily accessible without removing the engine.
External engine components such as intake and exhaust manifolds, crankcase, water pump, oil pump, starter motor, alternator and fuel system components can be removed for repairs without removing the engine from the vehicle.
Because the cylinder head can be removed without completely removing the engine, maintenance of the camshafts and valve train can be done without removing the engine. The camshaft drive belt can also be replaced.
Under emergency circumstances caused by a lack of necessary equipment, repair or replacement of piston rings, pistons, connecting rods and bearings can be made without removing the engine from the vehicle. In this case, you will need a lift or overpass. To remove the above elements, it is necessary to remove the oil sump.