This is an HX40W turbocharger, part number 4031221H or 4040752, designed for Volvo D7 engines found in FM7 trucks. It functions by using exhaust gases to drive a turbine, which compresses intake air for increased engine power and efficiency. This unit is built to exacting standards, offering reliable performance superior to a worn component, and operators may notice reduced engine performance, excessive smoke, or unusual noises if it is failing.
Always verify with serial number before ordering.
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Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.
Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.
Symptoms of a failing turbocharger include a significant loss of engine power, audible whistling or grinding noises, and excessive exhaust smoke. If ignored, the turbocharger can fail, leading to reduced engine efficiency and potential damage to other engine components. Continued operation risks substantial repair costs and equipment downtime.
Ensure the oil supply and return lines are thoroughly cleaned and free of any blockages or carbon deposits before connecting them to the new turbocharger. Never use sealant on turbocharger oil line fittings.
When replacing a turbocharger, it is essential to inspect the intercooler for leaks or damage and clean the air intake plumbing.