3581770 Volvo Penta Filler Cap | Genuine Used Part
3581770 Volvo Penta Filler Cap | Genuine Used Part
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✓ Authorised Volvo Penta Dealer · Genuine used marine parts · Ships Australia-wide
🔧 Product Description
Genuine Volvo Penta Heat-Exchanger Coolant Filler Cap - Part Number: 3581770
A genuine used Volvo Penta filler cap for the engine heat exchanger and closed freshwater-cooling circuit.
This component is a coolant-system filler cap rather than an engine-oil filler cap. It seals the heat-exchanger filling neck and maintains the specified pressure in the freshwater cooling system.
⚙️ Key Features
- Genuine Volvo Penta heat-exchanger filler cap
- Correct part number 3581770
- Cooling-system component
- Seals and pressurises the freshwater circuit
- Used on MD and D2-series marine diesels
🚤 Compatibility
Commonly used on
- Volvo Penta D2-55
- Volvo Penta D2-55B
- Volvo Penta MD2010C / MD2010D
- Volvo Penta MD2020C / MD2020D
- Volvo Penta MD2030C / MD2030D
- Volvo Penta MD2040A / MD2040B / MD2040C / MD2040D
- Selected 20x0C and 20x0D heat-exchanger assemblies
- Engine Type: Volvo Penta compact marine diesel with closed freshwater cooling
- Year Range: Primarily late-1990s through 2000s
- Fitment Requirement: Confirm filler-neck depth and pressure rating
🔌 Function
The cap seals the heat exchanger, allows coolant filling and maintains cooling-system pressure to raise the coolant boiling point.
⚠️ Common Signs of Failure
- Coolant leaking around the filler neck
- Cooling system will not hold pressure
- Coolant expelled into the overflow
- Damaged cap seal or spring
- Overheating caused by pressure loss
🔄 Supersession & Cross Reference
OEM Supersession Chain
- 3581770 established Volvo Penta filler-cap reference
- Listed as discontinued by some suppliers
- No confirmed direct supersession
OEM / Related Numbers
- 3581770
- VOP3581770
- 3581924 related heat-exchanger housing
- 861898 related air inlet
- 861904 related cooling-system tube
- 861906 related exhaust-pipe elbow
- Pressure rating must match the original Volvo Penta cap specification
Aftermarket / Verified Equivalents
- No verified direct aftermarket cap with confirmed Volvo pressure calibration
- Genuine used or new-old-stock 3581770 caps are the safest replacement
- Generic radiator caps must not be fitted unless pressure, neck depth and sealing dimensions are verified
📦 Condition
- Genuine used part
- Removed from running engine where applicable
- In good working condition unless otherwise stated
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 the condition you received it for a refund or exchange. 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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