Noisy Turbocharger
  Noisy Turbo:                           
Clogged air filter - 	Replace air filter  
                 
Air leak in duct from compressor to intake manifold - 	Replace seals or tighten fasteners
Air leak at intake manifold to engine joint - 	Replace seals or tighten fasteners
Air leak in duct from air cleaner to compressor - 	Replace seals or tighten fasteners
Obstruction in exhaust manifold - 	Remove Obstruction
Obstructed air intake to turbo - 	Remove Obstruction 
Obstructed air outlet duct from compressor to intake manifold - Remove Obstruction  
Obstructed intake -  	Remove Obstruction
Gas leak in exhaust manifold to engine joint - 	Replace seals or tighten fasteners
Gas leak in turbine inlet to exhaust manifold joint - 	Replace seals or tighten fasteners
Gas leak in ducting after turbine outlet - 	Repair gas leak
Dirt caked on compressor wheel - Clean with non caustic cleaner and soft brush, change filters
Damaged turbo - Analyze turbo to determine failure, replace turbo