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Reduce pump leakage with a treated gear and billet back plate
Boundary VQ-S1-VHR-BBP-M is a complete oil pump assembly for Nissan and Infiniti VQ VHR 3.5L and 3.7L engine builds. It combines Boundary's MartenWear-treated billet gear with a precision billet back plate to improve internal control in high-load and high-RPM oiling service.
Key Features
- Complete VQ VHR oil pump assembly
- Fits the VQ VHR 3.5L and 3.7L engine family
- Billet steel pump gear
- MartenWear treated gear surface
- Billet back plate replaces the stamped factory-style plate
- Engine-builder verification is required for the exact VQ configuration
Fitment
| Application Type | Requirements |
|---|---|
| Engine-family specific | No year-make-model fitment applies. Confirm the exact engine family, oil-pump housing, crank drive, clearances, pressure requirements, and complete build specification. |
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | VQ-S1-VHR-BBP-M |
| Engine Family | Nissan/Infiniti VQ VHR 3.5L and 3.7L |
| Configuration | Complete oil pump assembly |
| Gear | Billet steel with MartenWear treatment |
| Back Plate | Billet back plate included |
| Application Type | Engine-family specific; no year-make-model mapping supplied |
What's Included
- One assembled VQ VHR oil pump
- One fitted billet back plate
- MartenWear-treated billet pump gear installed in the assembly
- Pressure shims, seals, pickup tube, fluids, and engine-build consumables are included only if present in the sealed manufacturer package.
About Boundary
Boundary engineers application-specific components around exact dimensions, materials, and operating requirements. Use the complete manufacturer part number and application data when matching companion parts or service procedures.
Related Parts
- No internal product link is included because related components must match the exact vehicle or engine, axle position, dimensions, and service configuration.
FAQ
What is the VQ-S1-VHR-BBP-M?It is the exact Boundary oil pump assembly configuration described by the specifications and application table on this page.
Is this sold as a complete vehicle set?Only the components listed in the What's Included section are supplied. Quantities and companion parts must be confirmed before installation.
Can fitment be selected by appearance?No. Match the part number and every application, position, dimension, engine, and configuration requirement.
Is professional installation recommended?Yes. Suspension, engine-oiling, and brake work affects vehicle safety or engine durability and should be completed by a qualified technician.
Are unrelated seals, fluids, or tools included?No. Consumables, fluids, tools, and unlisted companion components must be sourced separately.
Should paired components be serviced together?Follow the vehicle and manufacturer service procedure. Axle-side suspension and brake components are commonly inspected and serviced in pairs.
Does the finish change compatibility?No. Finish describes corrosion, heat, or appearance characteristics; compatibility still depends on the exact configuration.
What should be checked after installation?Verify fastener torque, clearances, leaks or fluid level where applicable, and correct operation before normal use.
Installation Instructions
- Confirm the engine family, pump drive, housing, clearances, and oiling-system requirements with the engine builder before assembly.
- Review the current manufacturer and vehicle service instructions and gather all required replacement fasteners, seals, fluids, and tools.
- Support the vehicle or engine safely and remove the original component without damaging mating surfaces, sensors, lines, or adjacent hardware.
- Compare the new part with the removed component and verify every mount, dimension, connection, and supplied component before installation.
- Install the part in the specified orientation and tighten fasteners in the documented sequence and torque stages.
- Complete any required bleeding, priming, alignment, calibration, or leak check, then inspect the installation again after the initial service cycle.
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