8976022180 Excavator 4HK1 Engine Parts Gasket

Part number 8976022180 is the original sealing/adjusting gasket provided by ISUZU (Isuzu) for the 4HK1 series diesel engine. According to the picture you uploaded, the component is a black circular metal gasket with a hole in the center. It is a standard accessory on the engine used to fill the gap between two planes, achieve sealing or fine tune tolerances. Its universal models cover various medium-sized hydraulic excavators equipped with 4HK1 engines, such as Hitachi ZX200-3, ZX240-3, ZX210LC-3, Shengang SK200-8, SK210LC-8, as well as Sumitomo SH210-5, SH240-5 and other models. As a disposable sealing component from the original factory, its thickness, inner/outer diameter, and surface flatness are precisely matched with the grooves or planes of specific installation positions (such as sensor bases, pipe joint flanges, valve covers, etc.). It is strictly prohibited to reuse or replace them with universal gaskets to avoid oil, water, and gas leaks.

This product is a metal/composite material stamped gasket, with a structure identical to the picture you provided: it is in the shape of a standard gasket, with neat processing of the outer edge and inner hole, and a matte surface. Its material is usually soft steel, stainless steel or non asbestos composite material, with thickness commonly ranging from 0.5mm, 1.0mm, 1.5mm and other series specifications to meet different gap adjustment needs. The working temperature range is -40 ℃ to+200 ℃, and it can withstand engine oil, diesel, coolant, and certain pressures. The surface of the gasket may be treated with phosphating or coating to improve corrosion resistance and prevent adhesion with the bonding surface. The light colored ring in the middle of the gasket in the picture may be a special coating or material difference area, designed to provide better sealing and filling effect when under pressure. Its core function is to fill micro unevenness through plastic deformation and achieve static sealing.

Timing of replacement: This gasket is a disposable component and must be replaced with a new one after disassembling the relevant parts. When overhauling the engine or replacing components such as sensors and pipe joints, they must be replaced simultaneously. Installation specifications: 1 Cleaning: It is necessary to thoroughly remove all old gasket residues, sealant, oil stains, and burrs on the joint surface with a scraper, sandpaper (such as 1000 grit), and cleaning agent to ensure a smooth surface. 2. Inspection: Use a ruler to check the flatness of the joint surface (usually required to be ≤ 0.05mm). 3. Placement: Accurately align the new gasket and place it on the joint surface. 4. Tightening: Tighten the fixing bolts in a staggered, crossed, and even manner according to the order and torque specified in the maintenance manual (usually 10-30 N · m, depending on the bolt specifications). Caution: It is strictly prohibited to apply excessive sealant on both sides of the gasket. It is only allowed to apply extremely thin flat sealant on one side of the gasket when it is non-metallic or specifically specified in the maintenance manual; During storage, it is necessary to prevent moisture, rust, and bending deformation.