Cylinder Head Gasket Multi-Layer Steel (MLS) 2-Hole 1.60mm Thickness for ISUZU NPR 4HK1 5.2L
| OEM Part Number: | 8-97375435-0 / 8973754350 | Diameter: | 115.5mm |
| Material: | Laminated Steel / Stainless Steel | Gasket Grade: | 2-Hole |
| Construction Type: | Multi-Layer Steel (MLS) | Projection Value Range: | 0.0232"–0.0263" (0.589–0.669mm) |
| Width: | 192mm | Length: | 590mm |
| High Light: | Multi-Layer Steel (MLS) Cylinder Head Gasket,2-Hole Cylinder Head Gasket,1.60mm Thickness Engine Gasket |
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The Cylinder Head Gasket with OEM numbers 8-97375435-0 and 8973754350 is a verified OEM-grade direct replacement for ISUZU NPR, NPR-HD, and NQR series trucks equipped with the 4HK1 5.2L diesel engine. This critical sealing component features Multi-Layer Steel (MLS) construction to seal combustion chambers, coolant passages, and oil channels between engine block and cylinder head.
- Real Shop Test Data: Precision-engineered MLS construction with 2-hole designation verified against ISUZU OEM specifications
- Proven Durability: Rated for 400,000+ km under normal operation per ISUZU N-Series standards
- Installation Success Rate: 99% direct replacement fitment confirmed across thousands of engine rebuilds
- OEM Cross-Reference Verified: Replaces 8973754350, 8-97375435-0, 8973754351
If your cylinder head gasket is failing, you may experience:
- Engine overheating with temperature gauge rising above normal
- Unexplained coolant loss without visible external leaks
- White smoke from exhaust indicating coolant in combustion chamber
- Oil contamination with milky or frothy appearance
- Significant loss of engine power due to compression loss
- Bubbling in radiator or coolant reservoir
Warning: A failing cylinder head gasket can lead to severe engine damage including warped cylinder heads, cracked engine blocks, or complete engine failure.
| Part Number | 8-97375435-0 8973754350 |
|---|---|
| Product Name | Cylinder Head Gasket |
| Car Model | ISUZU NPR |
| Engine Model | ISUZU 4HK1 |
| Condition | 100% Brand New |
CRITICAL: ISUZU 4HK1 engines use three different thickness head gaskets. Using the wrong gasket can cause engine damage. The correct gasket is determined by measuring piston protrusion.
| Gasket Grade / Notch | Projection Value | Gasket Thickness | Part Number |
|---|---|---|---|
| No-Hole | 0.0173"-0.0204" (0.439-0.519mm) | 1.50mm | 8-97375433-1 |
| 1-Hole | 0.0204"-0.0232" (0.519-0.589mm) | 1.55mm | 8-97375434-1 |
| 2-Hole | 0.0232"-0.0263" (0.589-0.669mm) | 1.575-1.60mm | 8-97375435 |
- Clean the engine block deck of all gasket material, carbon, or debris
- Place a dial indicator on the deck surface and measure piston protrusion at TDC
- Measure each of the four cylinders
- The gasket to use is based on the highest projection value recorded
- Check the gasket for holes (no hole, one hole, or two holes depending on thickness)
Please confirm with your customer:
- Piston protrusion measurement from the engine (highest value)
- Hole count on the original gasket (0, 1, or 2 holes)
- Original part number from the old gasket
| Brand | Model | Series / Chassis | Engine | Years |
|---|---|---|---|---|
| ISUZU | NPR | N-Series | 4HK1 5.2L | 2005-2007 |
| ISUZU | NPR-HD | N-Series | 4HK1 5.2L | 2005-2009 |
| ISUZU | NQR | N-Series | 4HK1 5.2L | 2005-2007 |
| ISUZU | NRR | N-Series | 4HK1 5.2L | 1998-2010 |
| Brand | Equipment Type | Models |
|---|---|---|
| Hitachi | Crawler Excavators | ZX Series (4HK1 powered) |
| JCB | Crawler Excavators | JS Series (4HK1 powered) |
| Case | Crawler Excavators | CX Series (4HK1 powered) |
Important:
- Designed for ISUZU 4HK1 5.2L diesel engines only
- This is a 2-hole (1.575-1.60mm) gasket - verify your engine requires this thickness
- Compatible with ISUZU NPR, NPR-HD, NQR, NRR, and ELF series trucks
- Also used in Hitachi, JCB, Case, and New Holland construction equipment
- Verify vehicle VIN number, engine serial number, or model code before ordering
| QC Item | Verification Method |
|---|---|
| Dimensional Accuracy | Precision inspection to verify 1.575-1.60mm thickness, 2-hole count, and sealing surface dimensions |
| Material Composition | Laminated steel layer analysis to verify anti-fatigue characteristics and heat resistance |
| Leakage Test | 100% pressure testing to guarantee zero gas, coolant, or oil leakage |
| Compression Simulation | Dynamic compression testing to verify sealing performance under operating conditions |
| Durability Cycle Test | 500+ hour thermal and pressure cycling to verify 400,000+ km service life |
Professional Installation Highly Recommended
Replacing a cylinder head gasket requires proper torque specifications, correct gasket positioning, and thorough engine component inspection.
- Verify gasket thickness matches original - confirm 2-hole (1.575-1.60mm) designation
- Measure piston protrusion for each cylinder - use highest value recorded
- Inspect cylinder head and engine block sealing surfaces for warpage or damage
- Clean all sealing surfaces thoroughly - debris can cause premature failure
- Check cylinder head bolt threads and replace if damaged
- Use new cylinder head bolts if recommended by workshop manual
- Ensure engine is completely disassembled with cylinder head removed
- Clean cylinder head and engine block sealing surfaces with appropriate solvent
- Check flatness of both surfaces using precision straightedge and feeler gauge
- Position new gasket correctly - ensure 2-hole orientation matches OEM specifications
- Install cylinder head onto gasket
- Follow angular tightening method specified in ISUZU workshop manual
- Torque cylinder head bolts in correct sequence to specified values
- Reassemble remaining engine components
- Refill with fresh coolant and engine oil
- Start engine and check for leaks
- Perform cooling system pressure test to verify seal integrity
- Packaging: Securely packed in protective packaging to prevent shipping damage
- Packaging Options: Neutral Box / Color Box / Custom Brand Package
- MOQ: Available upon request
- Delivery Time: 5-20 days after deposit
- Suitable for: Wholesale distributors, engine rebuild shops, truck repair facilities, construction equipment service centers, and fleet owners
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