This cylinder head cup sealing is a genuine OEM replacement designed for:

• Isuzu NPR

• Isuzu NPR-HD

• Isuzu NQR

• Isuzu NRR

Engines Supported:

• 4HK1 5.2L Diesel

• 4HE1 4.8L Diesel

Years: 1998–2018

The cup sealing sits within the cylinder head assembly, providing a leak-proof barrier between high-pressure areas, coolant passages, and engine oil channels. Proper sealing prevents the following:

• Oil or coolant leaks

• Compression loss

• Engine overheating

• Premature wear or damage to cylinder head components

Over time, cup seals can degrade due to heat, pressure, and engine vibration. Replacing worn seals with OEM components ensures long-lasting engine reliability and performance.

Key Features

• Genuine New OEM cylinder head cup sealing

• Fits Isuzu NRR, NQR, NPR, NPR-HD (1998–2018)

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

• Prevents leaks and maintains engine compression

• High-quality material for heat and pressure resistance

• Direct OEM replacement

Vehicle Compatibility

Fits:

• Isuzu NPR

• Isuzu NPR-HD

• Isuzu NQR

• Isuzu NRR

Engine: 4HK1 5.2L / 4HE1 4.8L Diesel
Years: 1998–2018
Condition: New OEM
Part Type: Cylinder Head Cup Sealing
System: Engine / Cylinder Head

Common Signs You Need Replacement

• Oil or coolant leaks around the cylinder head

• Engine overheating

• Loss of compression or power

• Visible wear, cracking, or deformation of sealing cups

• Unusual engine noise or blow-by

  Frequently Asked Questions (FAQ)

  What is a cylinder head cup sealing?

  It is a sealing component installed in the cylinder head to prevent leaks between oil, coolant, and compression areas.

  Which models and engines does it fit?

  This OEM cup sealing fits Isuzu NRR, NQR, NPR, and NPR-HD models (1998–2018) with 4HK1 5.2L and 4HE1 4.8L diesel engines.

  Can a worn cup seal cause engine damage?

  Yes. Worn or damaged seals can cause oil/coolant leaks, loss of compression, overheating, and cylinder head damage.

  Is professional installation recommended?

  Yes. Proper installation ensures correct sealing and engine reliability.

  Why choose OEM replacement?

  OEM parts guarantee correct fitment, material quality, and durability for optimal engine performance.