1556989 Plug | Genuine Volvo Penta Part

🔧 Product Description

This genuine Volvo Penta plug is a machined connection, housing or closure component used in the engine gallery closure. It is manufactured to the original Volvo Penta dimensions and interface requirements so the adjoining component remains supported, located and sealed at the housing or closure. In service, it closes the designated machined engine passage and retains the fluid or pressure within it. Fitment is controlled by the exact engine or product configuration and serialised parts list; confirm OEM number 1556989 against the installed assembly before ordering.

🚤 Compatibility

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

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 1556989
• System group: Engine
• Supersedes part numbers 1556860 and 1543937
• Net weight approximately 0.025 kg
• Fits TID162, TD164, TAMD162, TAMD163, TAMD165, TWD1620/1630 and TAD1630/1631 series engines
• 24 used per assembly

🔌 Function

Closes the designated machined engine passage and retains the fluid or pressure within it. Inspect the housing, bore, threads and sealing face for distortion or corrosion, then tighten the cover or closure using the specified sequence and torque.

⚠️ Common Signs of Failure

• Oil, coolant or fuel seepage around the plug seat
• Damaged, rounded or stripped drive recess preventing removal or correct torque
• Corrosion or pitting on the sealing face causing a persistent weep
• Plug loosening from vibration and creating a pressure loss in the sealed circuit
• Damaged or flattened sealing washer or thread sealant leaving a residual leak after retightening

🛠️ 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

• 1556989 → Supersedes 1556860 → Supersedes 1543937

OEM / Related Numbers

• 1556860 earlier number superseded by this part
• 1543937 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 TAMD162C-C, TAMD162A, TAMD162B, TAMD162C, TAMD162C-B
• Volvo Penta TID162AG, TID162AGP, TID162AP, TID162APB
• Volvo Penta TAD1630G, TAD1630GE
• Volvo Penta TAD1631GE, TAD1631G
• Volvo Penta TAMD163A-A, TAMD163P-A
• Volvo Penta TAMD165A, TAMD165C
• Volvo Penta TWD1630G, TWD1630V
• Volvo Penta TD164KAE
• Volvo Penta TWD1620G