Volvo Penta D3 Fuel Delivery Pipe 31251172 | OEM Common Rail Cylinders 1-2
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Part Information
- Part Number: 31251172
- Brand: Volvo Penta
- Official Product Type: High-Pressure Fuel Delivery Pipe — Cylinders 1 and 2
- Supersedes: No supersession on record
- Replaced By: No current supersession on record
- Diagram Position: Common-Rail Fuel Injection System — Delivery pipe serving cylinders 1 and 2 (D3 fuel injector / delivery pipe assembly)
Overview
The Volvo Penta 31251172 is a genuine OEM high-pressure fuel delivery pipe for the common-rail fuel injection system on Volvo Penta D3 marine diesel engines. It connects the distribution rail to the injectors serving cylinders 1 and 2. The D3 fuel system uses four position-specific delivery pipes — each formed to fit a precise routing path — so matching the exact OEM part number to the correct cylinder connection is essential. High-pressure common-rail pipes must never be reshaped or modified to fit.
Compatible Applications
- Volvo Penta D3-110I (generations D–H)
- Volvo Penta D3-140A / D3-140I (generations D–H)
- Volvo Penta D3-150I (generations D–H)
- Volvo Penta D3-170A / D3-170I (generations D–H)
- Volvo Penta D3-200A / D3-200I (generations D–H)
- Volvo Penta D3-220A / D3-220I (generations D–H)
Confirm your complete engine model, generation suffix, and serial number against the Volvo Penta D3 fuel injector and delivery pipe diagram before ordering.
Serial Number Requirements
The D3 fuel system uses several different formed delivery pipes, each specific to a cylinder position or pump connection. Always confirm by engine model, generation suffix, and serial number. Do not substitute delivery pipes between positions — each pipe is formed to a specific routing path and connection geometry.
System
Fuel System — Common-Rail High-Pressure Fuel Injection / Distribution Rail to Injectors
Related Parts — D3 Common-Rail Fuel System
The following components are part of the D3 fuel injection system and should be inspected during delivery pipe service:
- Delivery Pipe — 31251173 (cylinders 3 and 4)
- Delivery Pipe — 31251174 (cylinder 5 / fuel-pump circuit)
- Delivery Pipe — 31251175 (fuel-pump connection)
- Distribution Pipe — 30777759
- Pressure Sensor — 30787950
- Control Valve — 31216313
- Injector — 3801385
- Retaining Clamp — 31272772
- Fuel Hose — 31321198
Dimensions & Weight
- Weight: Approximately 0.5 kg
- Pipe routing and dimensions are specific to the cylinders 1 and 2 position — confirm via Volvo Penta D3 fuel system diagram
When This Part Needs Replacement
Replace the delivery pipe if any of the following apply:
- Pipe is bent, kinked, or physically damaged
- Corrosion or external damage to the pipe body or fittings
- Leaking at a high-pressure connection (rail or injector end)
- Damaged during injector or fuel rail service
- Unable to seal correctly at the fitting after reassembly
High-pressure common-rail pipes must not be reshaped, bent, or modified to fit. If the pipe is damaged, replace it with the correct OEM part.
Installation Notes
Use the applicable Volvo Penta D3 service procedure for all high-pressure fuel system work. Tighten all fuel connections to the specified torque values — over- or under-tightening high-pressure fittings can cause leaks or fitting damage. Inspect the injector and rail fittings for damage before installing the new pipe.
Technical FAQ
Q: What is the difference between 31251172, 31251173, 31251174, and 31251175?
A: These are four separate position-specific high-pressure delivery pipes in the D3 common-rail fuel system. 31251172 serves cylinders 1 and 2, 31251173 serves cylinders 3 and 4, 31251174 serves cylinder 5 and the fuel-pump circuit, and 31251175 is the fuel-pump connection pipe. They are not interchangeable — each is formed to a specific routing path.
Q: Can I reshape a delivery pipe to make it fit?
A: No. High-pressure common-rail fuel pipes must never be bent or reshaped. The pipe geometry is precision-formed for the specific routing path and connection angles. A modified pipe can fail under high-pressure fuel system operating conditions.
Q: How do I confirm this is the right pipe for my engine?
A: Confirm your engine model, generation suffix (D, E, F, G, or H), and serial number, then cross-reference with the Volvo Penta D3 fuel injector and delivery pipe diagram to verify the cylinder 1-2 position.
Parts Desk Insights
The most common issue with D3 delivery pipe orders is customers ordering by engine family without specifying the cylinder position. All four delivery pipes in this system look similar and are close in price, but they are formed to different routing paths and are not interchangeable. The fastest way to confirm the right pipe is to pull up the D3 fuel injector diagram for the specific engine generation and identify the pipe by its cylinder position. It’s also worth reminding customers that high-pressure fuel pipes should never be reused if they’ve been bent or damaged — even a small deformation at a fitting can prevent a proper seal under operating pressure.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.