Genuine 1992 Mercedes-Benz 190E Cylinder Head

1992 Mercedes-Benz 190E Cylinder Head Parts Q&A

• Q: How to remove and inspect cylinder heads on 1992 Mercedes-Benz 190E?

  A: New and reconditioned cylinder heads are available from the manufacturer and engine overhaul specialists, but some specialist tools are necessary for dismantling and inspection procedures, and new components may not be easily accessible. For home mechanics, purchasing a reconditioned head may be more practical and economical than dismantling, inspecting, and reconditioning the original head. A valve spring compressor tool is required for this operation. For four-cylinder petrol engines, the process begins with removing the cylinder head, followed by the inlet and exhaust manifolds, rocker gear, valve lifters, and camshaft. If desired, spark plugs can be unscrewed from the cylinder head, and the thermostat housing can be unbolted where applicable. Using a valve spring compressor, compress each valve spring to remove the split collets, then lift off the spring cap and spring. If the spring cap does not free easily, gently tap the top of the tool with a light hammer. Carefully extract the valve stem oil seal with pliers, then lift off the spring seat before withdrawing the valve through the combustion chamber. Each valve must be stored with its collets, cap, spring, and spring seat in the correct sequence, ideally in labelled bags. For six-cylinder petrol engines, the process is similar, starting with the removal of the cylinder head, inlet and exhaust manifolds, rocker gear, valve lifters, and camshaft. For diesel engines, the cylinder head and exhaust manifold are removed, and glow plugs can be taken out if desired.