Cylinder Head Gasket for ISUZU 4JJ1 4JK1 Engines — Multi-Layer Steel (MLS) 1.15mm Thickness with 3-Notch Design
Price:
Negotiable
MOQ:
10 pcs
Delivery Time:
5-8 Work Days
Brand:
YIMI
Product Description
Cylinder Head Gasket 8-98135955-0 8-98241039-0 for ISUZU NKR 4JJ1 4JK1 — OEM MLS 1.15mm 3-Notch
Product Overview
The Cylinder Head Gasket with OEM numbers 8-98135955-0 (also listed as 8981359550) and 8-98241039-0 (also listed as 8982410390) is a verified OEM-grade direct replacement for ISUZU 4JJ1 and 4JK1 diesel engines, commonly found in NKR and NPR trucks, D-MAX pickups, and construction equipment.
- Real Shop Test Data: Precision-engineered Multi-Layer Steel (MLS) construction with 97mm diameter verified against ISUZU OEM specifiions
- Proven Durability: Laminated steel construction rated for 300,000+ km under normal operation
- Installation Success Rate: 99% direct replacement fitment confirmed across thousands of engine rebuilds
- OEM Cross-Reference Verified: Replaces 8-98135955-0, 8981359550, 8-98241039-0, 8982410390, 8-97328868-2, 8973288682
Failure Symptoms
If your cylinder head gasket is failing, you may experience one or more of the following symptoms:
- Engine Overheating: Temperature gauge consistently rising above normal
- Coolant Loss: Unexplained drop in coolant level with no visible external leaks
- White Smoke from Exhaust: Steam-like white smoke indiing coolant entering combustion chamber
- Oil Contamination: Milky or frothy appearance on oil dipstick or oil filler cap
- Loss of Engine Power: Significant reduction in engine performance due to compression loss
- Bubbling in Radiator: Air bubbles visible in radiator or coolant reservoir
⚠️ Important: A failing cylinder head gasket can lead to severe engine damage including warped cylinder heads, cracked engine blocks, or complete engine failure — prompt replacement is essential.
Thickness & Notch Selection Guide
⚠️ CRITICAL: ISUZU 4JJ1/4JK1 engines use three different thickness head gaskets. Using the wrong gasket can cause engine damage.
| Gasket Type | Notch / Holes | Thickness | Part Number Reference |
|---|---|---|---|
| Type A | 1-Notch / 1-Hole | 1.05 mm | 8-97328866-2 |
| Type B | 2-Notch / 2-Hole | 1.10 mm | 8-98135954-0 |
| Type C | 3-Notch / 3-Hole | 1.15 mm | 8-98135955-0 / 8-98241039-0 |
How to Determine the Correct Gasket:
- Check the notch count on your original gasket (1, 2, or 3 notches)
- The correct gasket thickness is determined by the piston projection from the cylinder block upper surface
- Always verify with the engine serial number for precise identifiion
Vehicle & Engine Compatibility
Primary Appliions — Automotive:
| Brand | Model | Series / Chassis | Engine | Years |
|---|---|---|---|---|
| ISUZU | NKR | N-Series | 4JJ1 3.0L, 4JK1 2.5L | 2004-2012 |
| ISUZU | NPR | N-Series | 4JJ1 3.0L, 4JK1 2.5L | 2004-2012 |
| ISUZU | D-MAX | TFR / TFS | 4JJ1-TC 3.0L, 4JK1-TC 2.5L | 2003-2012 |
Cross-Brand Appliions — Construction & Industrial Equipment:
- Hitachi: Crawler Excavators ZX55, ZX60, ZX65, ZX70, ZX110, ZX120, ZX130, ZX135, ZX160, ZX180
- JCB: Crawler Excavators JS70, JS75, JS80, JS130, JS145, JS160, JS180
- Case: Crawler Excavators CX130, CX135, CX145, CX160, CX180
- Kobelco: Crawler Excavators SK55, SK60, SK70
- Sumitomo: Crawler Excavators SH120, SH160
- Takeuchi: Crawler Excavators TB070, TB114
⚠️ Important: This cylinder head gasket is designed for ISUZU 4JJ1 and 4JK1 diesel engines only. This is a Type C — 3-Notch (1.15mm) gasket — verify your engine requires this thickness before ordering.
Features & Benefits
OEM Specifiion — ISUZU Genuine
Guarantees factory-fit quality and performance — verified by ISUZU OEM part numbers
Multi-Layer Steel (MLS) Construction
Delivers superior sealing under extreme combustion pressure and temperature
1.15 mm Thickness (Type C / 3-Notch)
Enables correct compression ratio maintenance for engines requiring maximum gasket thickness
97 mm Diameter
Precision-matched to 4JJ1/4JK1 cylinder bore specifiions
Anti-Fatigue Design
Minimizes gasket fatigue and increases reliability against gas and water leakage
Cross-Industry Compatibility
Fits ISUZU trucks and construction equipment from Hitachi, JCB, Case
Quality Control & Verifiion
| QC Item | Verifiion Method |
|---|---|
| Dimensional Accuracy | Precision inspection to verify 1.15mm thickness, 3-notch count, and 97mm diameter |
| Material Composition | Laminated steel layer analysis to verify anti-fatigue characteristics |
| Leakage Test | 100% pressure testing to guarantee zero gas, coolant, or oil leakage |
| Compression Simulation | Dynamic compression testing to verify sealing performance |
| Durability Cycle Test | 500+ hour thermal cycling to verify 300,000+ km service life |
| Final Assembly Inspection | 100% visual and dimensional inspection before packaging |
Installation & Maintenance Recommendations
⚠️ IMPORTANT: Professional Installation Highly Recommended. Replacing a cylinder head gasket requires proper torque specifiions, correct gasket positioning, and thorough engine component inspection.
Pre-Installation Checklist:
- Verify gasket thickness matches the original — confirm Type C / 3-Notch (1.15mm) designation
- Inspect cylinder head and engine block sealing surfaces for warpage or damage
- Clean all sealing surfaces thoroughly — any debris can cause premature gasket failure
- Check cylinder head bolt threads and replace if damaged
- Use new cylinder head bolts if recommended by workshop manual
Installation Guidelines (Reference ISUZU 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 3-notch orientation matches OEM specifiions
- Install cylinder head onto gasket
- Follow angular tightening method specified in ISUZU workshop manual
- Torque cylinder head bolts in correct sequence to specified torque 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 & Supply
- Packaging: Each cylinder head gasket securely packed in protective packaging
- Packaging Options: Neutral Box / Color Box / Custom Brand Package
- Suitable for: Wholesale distributors, engine rebuild shops, truck repair facilities, construction equipment service centers, and fleet owners
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Yimi (Guangzhou) Automotive Parts Co, Ltd
Location
Unit 1313, Building 5, Changsheng DDP Fashion Center, No. 17 Dachi Road, Tancun, Shijing Subdistrict, Baiyun District, Guangzhou City.
Contact Person
James