477905 Cover | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta cover from the Cooling System group, weighing 0.617 kg and listed for 59 applications across the TAMD, TWD, TID, TD and TAD series. It supersedes part number 420758, catalogued earlier as a cover and thermostat housing, so the current number covers what used to be sold under the housing description.

🚤 Compatibility

• Engine Family: TAMD, TWD, TID, TD, TAD

Full model list at the end of this description.

⚙️ Key Features

• 0.617 kg
• 59 applications across five engine series
• Supersedes 420758, formerly listed as a cover and thermostat housing
• Cooling System component

🔌 Function

Closes off the coolant passage at the thermostat position and forms the sealing face for the outlet joint.

⚠️ Common Signs of Failure

• Coolant weeping or crusting at the cover joint
• Overheating or an erratic temperature gauge if the thermostat seat is damaged
• Coolant level falling with no hose leak found
• Sealing face found pitted, eroded or corroded on strip-down
• Bolt holes corroded or the flange bowed between the bolts

🛠️ Service Notes

• Because 420758 was catalogued as a cover and thermostat housing, check whether the thermostat and its seal come with your engine's build or need ordering separately
• Renew the gasket or O-ring, clean both faces and tighten evenly, then pressure test the system before running up

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 477905 → Supersedes 420758 → Supersedes 471781

OEM / Related Numbers

• 420758 earlier number superseded by this part
• 471781 earlier number superseded by this part

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TAMD74P-A, TAMD74P-B, TAMD74A, TAMD74C-A, TAMD74C-B, TAMD74L-A, TAMD74L-B
• Volvo Penta TD61A, TD61ACE, TD61AG, TD61AGP, TD61AP, TD61APB, TD61AW
• Volvo Penta TD71A, TD71ACE, TD71AG, TD71AGP, TD71AP, TD71APB, TD71AW
• Volvo Penta TID71A, TID71AG, TID71AGP, TID71AP, TID71APB
• Volvo Penta TWD710G, TWD710P, TWD710PB, TWD710V
• Volvo Penta TAD730G, TAD730P, TAD730V
• Volvo Penta TAMD72A, TAMD72P-A, TAMD72WJ-A
• Volvo Penta TAMD63L-A, TAMD63P-A
• Volvo Penta TAMD71B, TAMD71A
• Volvo Penta TAMD73P-A, TAMD73WJ-A
• Volvo Penta TD610M, TD610V
• Volvo Penta TD630ME, TD630VE
• Volvo Penta TD730ME, TD730VE
• Volvo Penta TID61AG, TID61AGP
• Volvo Penta TWD630ME, TWD630VE
• Volvo Penta TAMD61A
• Volvo Penta TAMD62A
• Volvo Penta TAMD75P-A
• Volvo Penta TD710G
• Volvo Penta TWD610V
• Volvo Penta TWD730ME
• Volvo Penta TWD731VE