Not always. Whether you need to remove the timing chain cover to replace a head gasket depends entirely on the engine design. Some engines allow head gasket replacement with the timing chain cover in place, while others require its removal to access the head bolts or provide sufficient working space.
Consult a repair manual specific to your vehicle's year, make, and model. This manual will have the correct procedure and will tell you definitively whether removing the timing chain cover is necessary.
