8-94396-334-0 Cylinder Head Gasket Isuzu 6he1 Truck Head Gasket

8-94396-334-0 Cylinder Head Gasket Fits for Isuzu 6he1

1. Quick Notice

Quick Notice: Confirm the OEM number 8-94396-334-0 on your original gasket before ordering. This cylinder head gasket is designed for the Isuzu 6HE1 turbocharged diesel engine. Verify engine variant (6HE1 or 6HE1-TC) and vehicle model (FVR32, NPR, NQR, FSR etc.) before purchase. Professional installation required.

2. Description

Description: The 8-94396-334-0 is an original equipment specification cylinder head gasket for the Isuzu 6HE1 series diesel engines. This gasket forms a critical seal between the engine block and cylinder head, withstanding extreme combustion pressures, high-temperature gases, and circulating engine coolant. Constructed from stainless steel with advanced coating technology for exceptional sealing performance and durability under the demanding conditions of turbocharged medium-duty diesel operation. Fits Isuzu 6HE1 and 6HE1-TC engines — a 6-cylinder, inline, direct injection, overhead camshaft (OHC) turbodiesel with 110mm bore and 125mm stroke, displacing 7,127cc and delivering up to 230 PS (169 kW) with 667 N·m of torqu. Compatible with numerous Isuzu commercial vehicle models including the FVR32 medium/heavy truck, FSR, FTR33P, NPR, NQR, as well as Isuzu bus applications such as LT132, LV132, and LT423. Also interchangeable across multiple Isuzu factory numbers: 8-94396-3340, 894396-3340, 8943963340, and cross-references to 8-94396-344-0. Common failure symptoms include loss of compression, persistent engine overheating, white sweet-smelling exhaust smoke, coolant loss without external leaks, milky engine oil, and bubbles in the radiator overflow tank. Replacement restores factory-specified sealing integrity between the cylinder head and engine block, maintaining proper compression across all six cylinders.

3. Parameters Table

4. Custom Content

MLS Construction: This gasket is manufactured using Multi-Layer Steel technology — multiple precision-stamped stainless steel layers sandwiched together. The embossed steel layers function as load-controlled springs, maintaining consistent sealing pressure across the cylinder head sealing surface as components expand and contract at different rates during thermal cycling. This design provides superior resistance to blowouts and warping under the extreme cylinder pressures of turbocharged diesel operation, typically up to 1,700 psi or higher.

Surface Preparation Requirements: Both the cylinder head and engine block must be perfectly clean before installation. Remove all old gasket material using a plastic scraper or non-metallic abrasive wheel. Do not use abrasive discs or wire brushes on aluminum components. The sealing surface must be flat and free of scratches or pitting — maximum allowable surface distortion is specified in the Isuzu service manual.

MLS Gasket Orientation: Multi-layer steel gaskets have a specific top and bottom orientation that must be observed. Install with the printed part number facing upward and toward the intake side. The gasket often has markings or stamped letters indicating proper orientation — verify these markings before tightening.

Multiple Gasket Thicknesses: Isuzu workshop manuals specify that there are multiple different head gasket thicknesses available for the 6HE1 engine-. The correct gasket is selected by measuring the distance between the piston crowns and the engine block deck, then choosing the gasket according to the smallest measurement. Genuine Isuzu MLS gaskets appear as multiple thin stainless sheets sandwiched together — this gasket conforms to that construction specification.

5. FAQ

Q1: Which Isuzu trucks use the 8-94396-334-0 cylinder head gasket?
A1: This gasket is designed for the 6HE1 turbocharged diesel engine installed in Isuzu FVR32 medium/heavy trucks, FSR, FTR33P, NPR, NQR, and Isuzu bus applications including LT132, LV132, and LT423.

Q2: What are the key specifications of the Isuzu 6HE1 engine?
A2: The 6HE1 is a 6-cylinder, inline, direct injection, OHC turbocharged diesel engine with 110 mm × 125 mm bore/stroke, 7,127 cc displacement, 16.9:1 compression ratio, producing 230 PS (169 kW) at 2,500 rpm with 667 N·m of torque at 1,500 rpm.

Q3: Is this gasket suitable for naturally aspirated 6HE1 engines?
A3: This gasket is primarily designed and tested for the turbocharged 6HE1-TC variant. For naturally aspirated 6HE1 engines, verify compatibility by comparing your original gasket part number-.

Q4: Are 8-94396-334-0 and 8-94396-344-0 interchangeable?
A4: Yes. Both part numbers reference the same cylinder head gasket specification and are interchangeable for the 6HE1 engine. Use either number when ordering.