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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
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:
⚠️ 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
Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ... Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ...
