Yimi (Guangzhou) Automotive Parts Co, Ltd
| Cylinder Configuration | Inline 4‑cylinder, 4‑stroke, OHV, direct injection |
| Displacement | 4,334 cc |
| Compression Ratio | 18.5 : 1 |
| Engine Compatibility | ISUZU 4HG1 (4.3L / 4,334 cc diesel) |
| Supply Ability | 10000 pcs/month |
| Packaging Details | Neutral Package or as customers’ request |
| Payment Terms | T/T,Western Union |
| OEM Part Number | 8-97144986-1, 8971449861 |
| Delivery Time | 5-8 Work Days |
| Gasket Type | Multi‑layer steel (MLS) – 3 layers |
| Bore × Stroke | 112 mm × 110 mm |
| Gasket Thickness | 1.15 – 1.25 mm |
| Place of Origin | China |
| Certification | ISO/TS16949 |
| Model Number | ISUZU NQR71 4HG1 |
| Brand Name | YIMI |
View Detail Information
Explore similar products
ISUZU C240 VALVE ROCKER ARM 9126113490
ISUZU TFR68 69 ENGINE MOUNTING R 8970391890
ISUZU TFR68 69 RUBBER ENG FOO L 5876101930 8970860761
ISUZU DMAX 4JA1 T H1 GEAR TIMING 52 8979427551
Product Specification
| Cylinder Configuration | Inline 4‑cylinder, 4‑stroke, OHV, direct injection | Displacement | 4,334 cc |
| Compression Ratio | 18.5 : 1 | Engine Compatibility | ISUZU 4HG1 (4.3L / 4,334 cc diesel) |
| Supply Ability | 10000 pcs/month | Packaging Details | Neutral Package or as customers’ request |
| Payment Terms | T/T,Western Union | OEM Part Number | 8-97144986-1, 8971449861 |
| Delivery Time | 5-8 Work Days | Gasket Type | Multi‑layer steel (MLS) – 3 layers |
| Bore × Stroke | 112 mm × 110 mm | Gasket Thickness | 1.15 – 1.25 mm |
| Place of Origin | China | Certification | ISO/TS16949 |
| Model Number | ISUZU NQR71 4HG1 | Brand Name | YIMI |
| High Light | ISUZU 4HG1 MLS cylinder head gasket ，multi-layer steel cylinder head gasket ，ISO 9001 certified engine gasket | ||
The cylinder head gasket carrying OEM numbers 8-97144986-1 and 8971449861 seals the combustion chamber between the cylinder head and engine block on the ISUZU 4HG1 4.3L naturally aspirated diesel engine. It is a direct replacement for NQR71 series medium‑duty trucks – a chassis variant with a longer wheelbase and higher gross vehicle weight rating than standard NKR/NPR models – manufactured from the mid‑1990s through the early 2000s.
The 4HG1 is a 4,334 cc inline‑four diesel engine with a bore and stroke of 112 mm * 110 mm. It produces up to 96 kW (130 PS) at 3,200 rpm and maximum torque of 310 Nm at 1,800 rpm, with a compression ratio of 18.5:1. The NQR71 chassis is rated for GVWR up to 9,500 kg, placing the engine under sustained high load during highway operation or stop‑start delivery.
This gasket uses multi‑layer steel (MLS) construction – typically three precision‑stamped steel layers with a heat‑activated elastomer coating on the outer surfaces. The MLS design withstands the high cylinder pressures of the 4HG1's 18.5:1 compression ratio while accommodating thermal expansion differences between the cast‑iron block and head.
| Part Number: | 8-97144986-1 8971449861 | Product Name: | Cylinder Head Gasket |
| Car Model: | ISUZU NQR71 | Engine Model: | ISUZU 4HG1 |
| Condition: | 100% Brand New | Size: | Standard |
| Weight: | Standard | Origin: | China Mainland |
| Main Market: | Middle East, Asia, Africa, South America, North America & Europe | ||
| Package: | Neutral Packing Or Make It As Requested | ||
| Material: | High-strength aluminum alloy & precision bearings | Cooling Type: | Engine coolant circulation |
| Installation: | Direct OEM replacement | Quality Standard: | OEM equivalent / ISO quality control |
This ISUZU NQR71 cylinder head gasket 8-97144986-1 directly replaces the factory gasket in the following configurations:
| Chassis | Engine | Years | Notes |
|---|---|---|---|
| ISUZU NQR71 | 4HG1 | 1994–2002 | Medium chassis, longer wheelbase, GVWR up to 9,500 kg |
| ISUZU NQR71 XD (extra duty) | 4HG1 | 1996–2002 | Reinforced frame, higher payload |
| ISUZU NKR66 XD | 4HG1 | 1994–2002 | Light cab‑over – same gasket |
| ISUZU NKR69 XD | 4HG1 | 1996–2002 | Late NKR XD variant |
| ISUZU NPR66 XD | 4HG1 | 1994–2002 | Most common 4HG1 truck |
| ISUZU NPR69 XD | 4HG1 | 1996–2002 | Heavy‑duty 6‑wheel |
| ISUZU ELF (Japanese market) | 4HG1 | 1994–2002 | All NKR/NPR/NQR variants |
The NQR71 is distinct from the NKR (light) and NPR (medium) chassis. It sits between them in GVWR and wheelbase, often used for refrigerated box trucks, flatbeds, and dump bodies. This gasket is interchangeable with 8-97144985-0 – the same MLS design for the 4HG1 family.
The gasket uses three precision‑stamped steel layers with embossed sealing beads that compress against the cylinder head and block, maintaining consistent clamping force through thousands of thermal cycles.
Each cylinder opening is surrounded by a stainless steel fire ring that creates a gas‑tight seal around the combustion chamber, resisting corrosion and retaining spring force at temperatures up to 800°C.
Heat‑activated elastomer coating flows into microscopic surface imperfections at operating temperature, sealing oil and coolant passages without additional sealant.
Fire rings are positioned with ±0.1 mm accuracy relative to bolt holes, ensuring concentric placement over cylinder bores for long-term reliability.
MLS design resists extrusion under cylinder pressures exceeding 1,600 psi during combustion, unlike composition gaskets that fail over time.
Sample gaskets undergo 500 thermal cycles from ambient to 150°C while pressurized to 1.5 times maximum cylinder pressure, with no measurable compression loss.
| QC Item | Verification Method |
|---|---|
| Fire ring bore alignment | Laser measurement of each fire ring opening against 112 mm ±0.03 mm |
| Layer registration | Optical inspection – edges of all three layers must align within 0.2 mm |
| Gasket thickness | Digital micrometer at 6 points; compressed thickness 1.15–1.25 mm |
| Fire ring material | Spectrographic analysis per batch – stainless steel grade |
| Elastomer coating integrity | Visual and adhesion test – no voids, cracks, or missing coating |
| Coating curing verification | Solvent rub test and surface hardness – proper cross‑linking confirmed |
| Fire ring compression test | Hydraulic press – sample compressed to 150 bar; fire ring height measured within spec |
| Thermal cycle test | Sample cycled –20°C to 150°C, 100 cycles; torque retention measured |
| Full dimensional inspection | CMM measurement against ISUZU engineering drawings; 100% of critical dimensions |
The manufacturing facility holds ISO 9001:2015 certification. A certificate of analysis (COA) with batch traceability is available for all wholesale orders.
The ISUZU NQR71 4HG1 cylinder head gasket 8-97144986-1 is an OEM‑specification, multi‑layer steel (MLS) replacement for the 4.3L diesel engine. It seals the 112 mm bores, resists 18.5:1 compression pressures, and prevents coolant‑oil cross‑contamination. One part number covers NQR71, NKR66 XD, NPR66 XD, and all other 4HG1‑powered ISUZU trucks.
ISO 9001 certification, batch traceability, and 0.85 kg packaging make this a practical choice for fleet maintenance and wholesale distribution. Order a sample unit today to verify fitment on your 4HG1 engine.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Trading Company,Seller
Year Established:
2005
Total Annual:
8000000-10000000
Employee Number:
100~150
Ecer Certification：
Verified Supplier
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 automotiv... 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 automotiv...
Get in touch with us
Leave a Message, we will call you back quickly!