8-97349490-1 GASKET; CYL HD ISUZU for NQR71/4HG1

The Critical Seal for Combustion, Oil, and Coolant

This gasket sits between the engine block and the cylinder head. It must simultaneously seal combustion pressure, engine oil, and engine coolant. When the head is torqued down, the gasket compresses to form a tight seal around the cylinders and fluid passages, allowing the engine to hold compression and maintain correct temperatures . Aftermarket gaskets that deviate in critical dimensions or material can lead to overheating, power loss, and premature failure .

 Multi-Layer Steel (MLS) Construction for Uncompromising Durability

Isuzu Genuine Cylinder Head Gaskets feature advanced Multi-Layer Steel (MLS) construction, consisting of multiple precision-stamped layers of stainless steel. The embossed steel layers act as load-controlled springs, maintaining consistent clamp load even as the head and block expand at different rates during thermal cycling. Many genuine Isuzu gaskets are available in different thickness grades, identified by the number of holes on the gasket edge (e.g., 1 hole = 1.40mm, 2 holes = 1.45mm, 3 holes = 1.50mm), to ensure correct compression ratio and piston-to-head clearance .