20405719 Plug | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta M22 threaded plug used to close a machined cylinder-block oil, coolant or manufacturing gallery. Quantity varies in the different D5/D7 block castings.

🚤 Compatibility

• Engine Family: D, TD, TAD, MD

Full model list at the end of this description.

⚙️ Key Features

• M22 threaded cylinder-block plug
• One or more used according to block casting
• Closes a machined engine gallery
• Requires the specified sealing method
• Confirmed across the complete D5/D7 engine family
• Engine type: Volvo Penta 5- and 7-litre industrial diesel

🔌 Function

Closes a machined gallery in the cylinder block to retain oil or coolant and prevent contamination.

⚠️ Common Signs of Failure

• Oil or coolant leakage from the plug
• Corroded or damaged plug head
• Loose plug or failed thread seal
• Damaged block threads
• Pressure loss in the affected gallery

🛠️ Service Notes

• Clean the threads and the seating face before fitting, and make sure the opening itself is clear of old sealant, swarf and corrosion
• Renew the sealing washer or O-ring where one is fitted rather than reusing a flattened one, and only use thread sealant where the workshop manual for your engine calls for it
• Tighten to the figure given in the workshop manual for your engine — plugs in aluminium and other soft castings strip easily, and a plug pulled up hard to cure a leak usually distorts the seat and makes it worse
• Where the plug closes an oil, fuel or coolant passage, run the engine up to temperature afterwards and check the joint under pressure before signing the job off
• Keep removed plugs paired with the holes they came out of during a strip-down — plugs of very similar appearance often differ in thread, reach or sealing type

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 20405719 → Supersedes 20508590

OEM / Related Numbers

• 20508590 earlier number superseded by this part
• 20405717 - M30 block plug
• 20405721 - A45 cap plugs
• 20508600 - related block plugs
• 20785813 - related block plugs

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D7A-B TA, D7A-T, D7A-TA, D7C-B TA, D7C-TA
• Volvo Penta D5A-B TA, D5A-T, D5A-TA
• Volvo Penta MD2010, MD2010B
• Volvo Penta TAD520GE, TAD520VE
• Volvo Penta TAD530GE MECH, TAD530GE EDC4
• Volvo Penta TAD531GE MECH, TAD531GE EDC4
• Volvo Penta TAD720GE, TAD720VE
• Volvo Penta TAD721GE, TAD721VE
• Volvo Penta TAD722GE, TAD722VE
• Volvo Penta TAD730GE MECH, TAD730GE EDC4
• Volvo Penta TAD731GE MECH, TAD731GE EDC4
• Volvo Penta TAD750GE, TAD750VE
• Volvo Penta TD520GE, TD520VE
• Volvo Penta TD720GE, TD720VE PP
• Volvo Penta TAD420VE
• Volvo Penta TAD532GE EDC4
• Volvo Penta TAD550GE
• Volvo Penta TAD551GE
• Volvo Penta TAD650VE
• Volvo Penta TAD732GE EDC4
• Volvo Penta TAD733GE EDC4
• Volvo Penta TAD751GE
• Volvo Penta TAD760VE
• Volvo Penta TD420VE