3978588 Piston Pin | Genuine Volvo Penta Part
3978588 Piston Pin | Genuine Volvo Penta Part
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Available from Volvo Penta international
Typically reaches our store in 10–14 business days
Availability checked daily with Volvo Penta
✓ Authorised Volvo Penta Dealer · Genuine Volvo Penta parts · Ships Australia-wide
🔧 Product Description
Genuine Volvo Penta piston pin from the Engine group, weighing 0.812 kg and listed for 12 applications across the TWD, TID, TAMD, TD and TAD series. It supersedes part number 477927. Piston pin 3978589 is the standard-size listing in the same number range and sits only 2 grams away, so weight will not separate the two.
🚤 Compatibility
Typically suits:
- Volvo Penta TWD710G
- Volvo Penta TWD710V
- Volvo Penta TID71A
- Volvo Penta TAMD71B
- Volvo Penta TD710G
- Volvo Penta TD71A
- Volvo Penta TAMD72P-A
- Volvo Penta TAMD72WJ-A
- Volvo Penta TAMD73P-A
- Volvo Penta TAMD73WJ-A
- Volvo Penta TAD730G
- Volvo Penta TAD730V
- Engine Family: TWD, TID, TAMD, TD, TAD
⚙️ Key Features
- 0.812 kg
- Supersedes 477927
- 12 applications across the TWD, TID, TAMD, TD and TAD series
- Near-identical in weight to piston pin 3978589
🔌 Function
Links the piston to the top of the connecting rod, carrying combustion load down into the rod while letting the rod swing.
⚠️ Common Signs of Failure
- Knocking or slapping from the top of the engine, loudest when cold
- Pin surface scored, blued or worn oval
- Free play felt between the pin and the small end
- Piston pin bore in the piston worn or stepped
- Circlip grooves damaged or a clip found displaced
🛠️ Service Notes
- 3978589 is the standard-size pin in the same range — check which listing your engine breakdown calls for before ordering
- Inspect the small end and the piston pin bore for matching wear, and fit new circlips
🔄 Supersession & Cross Reference
OEM Supersession Chain
- 3978588 → Supersedes 477927 → Supersedes 421033
OEM / Related Numbers
- 477927 earlier number superseded by this part
- 421033 earlier number superseded by this part
📦 Condition
- Genuine Volvo Penta part
- Brand new
- Supplied in original or equivalent packaging
Shipping & Delivery
Shipping & Delivery
Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.
Returns & Warranty
Returns & Warranty
14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in new, unused condition for a refund or exchange. Manufacturer warranties apply to new parts. Full details in our Refunds & Returns policy.
Not sure this fits?
Not sure this fits?
Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.
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