This oil pipe to vacuum pump is designed for the following Isuzu medium-duty trucks:

• Isuzu NPR

• Isuzu NPR-HD

• Isuzu NRR

• Isuzu NQR

Model Years: 2001–2009
Engines Supported:

• 4HE1 4.8L Diesel

• 4HK1 5.2L Diesel

The oil pipe supplies engine oil to the vacuum pump for proper lubrication and cooling. The vacuum pump is critical for generating vacuum pressure used by the brake booster and other vacuum-operated systems.

A damaged, leaking, or clogged oil pipe can cause the following:

• Oil leaks around vacuum pump

• Reduced vacuum pump lifespan

• Brake assist performance issues

• Engine oil pressure irregularities

This replacement pipe restores proper oil flow and ensures reliable vacuum pump operation. Manufactured to match factory routing and connection specifications for secure fitment.

Key Features

• Direct replacement oil supply pipe

• Fits 2001–2009 Isuzu NPR, NPR-HD, NRR, NQR

• Compatible with 4HE1 4.8L and 4HK1 5.2L diesel engines

• Maintains proper lubrication of vacuum pump

• Durable construction for high-temperature engine conditions

• Factory-style fit and connection points

Vehicle Compatibility (2001–2009)

Fits:

• Isuzu NPR

• Isuzu NPR-HD

• Isuzu NRR

• Isuzu NQR

Engines:

• 4HE1 4.8L Diesel

• 4HK1 5.2L Diesel

Condition: New
Part Type: Engine Oil Pipe (Vacuum Pump Supply Line)
Location: Engine – Oil Feed to Vacuum Pump

Common Signs You Need Replacement

• Visible oil leakage near vacuum pump

• Low brake assist performance

• Cracked or corroded oil line

• Oil pressure warning symptoms

• Vacuum pump noise due to poor lubrication

  Frequently Asked Questions (FAQ)

  What is the function of this oil pipe?

  It supplies engine oil to the vacuum pump for lubrication and cooling, ensuring proper brake assist performance.

  Which trucks does this fit?

  This pipe fits Isuzu NPR, NPR-HD, NRR, and NQR models from 2001 to 2009 equipped with 4HE1 4.8L or 4HK1 5.2L diesel engines.

  Can a leaking oil pipe affect braking?

  Yes. If the vacuum pump is not properly lubricated, it can fail and reduce brake booster assist.

  Is professional installation recommended?

  Yes. Proper routing and sealing are important to prevent oil leaks and ensure correct engine lubrication.