6HK1 Engine Gasket Kit 1-87812-316-0 JS330 ZX330 ZAX330 Isuzu Gasket

1. Quick Notice

Confirm your engine code (6HK1, 6HK1T, or 6HK1-XQSA) and excavator model (JS330, ZX330, ZAX330) before ordering. This gasket kit is designed for Isuzu 6HK1 diesel engines. Professional installation required. Torque specifications vary by application; consult the factory service manual.

2. Description

The 6HK1 Engine Gasket Kit 1-87812-316-0 is a complete overhaul gasket set for Isuzu 6HK1 series diesel engines. This 7.8L inline 6-cylinder engine features a 115mm bore, 125mm stroke, and a 17.5:1 compression ratio-11. The full gasket set includes the cylinder head gasket, valve oil seals, front crankshaft oil seal, rear crankshaft oil seal, oil pan gasket, valve cover gasket, and all necessary seals for a complete engine rebuild-. Compatible with Hitachi ZX330, ZX330-3, ZX350-3 excavators and Isuzu JS330, ZAX330 models powered by the 6HK1 engine-41. Common failure symptoms include persistent engine overheating, coolant loss without external leaks, milky oil, white smoke from exhaust, and poor engine performance-. Replacement restores factory sealing integrity and prevents cross-contamination of engine fluids.

3. Parameters Table

4. Custom Content

Surface Preparation: Both the cylinder head and engine block surfaces must be clean and flat before installation. Remove all old gasket material using a plastic scraper. Do not use abrasive discs or wire brushes on sealing surfaces. Maximum allowable surface distortion is specified in the Isuzu service manual.

Gasket Orientation: Install cylinder head gasket with the part number facing upward toward the intake side. The 6HK1 engine has a single cylinder head covering all six cylinders. Verify correct orientation before torquing.

Torque Specifications: Tighten cylinder head bolts in the specified sequence (center outward) using multiple progressive stages. Replace head bolts with new units as required. Torque values vary by application.

Complete Kit Content: This overhaul gasket set includes cylinder head gasket, valve stem oil seals (24 required for 24-valve 6HK1), front and rear crankshaft oil seals, camshaft seals, oil pan gasket, valve cover gasket, intake and exhaust manifold gaskets, water outlet gasket, thermostat housing gasket, turbocharger gaskets, and fuel system O-rings.

5. FAQ (One by One Question and Answer)

Q1: Which engines use the 1-87812-316-0 gasket kit?
A1: This kit fits Isuzu 6HK1 naturally aspirated, 6HK1T turbocharged, and 6HK1-XQSA engine variants. The 6HK1 is a 7.8L inline 6-cylinder diesel engine.

Q2: Which excavators are compatible with this gasket kit?
A2: Hitachi ZX330, ZX330-3, ZX330-5G, ZX350-3, ZX360LC-3, as well as Isuzu JS330 and ZAX330 excavators powered by the 6HK1 engine.

Q3: What is included in this gasket kit?
A3: The complete overhaul set includes the cylinder head gasket, valve oil seals, front and rear crankshaft oil seals, oil pan gasket, valve cover gasket, and all necessary seals for a full engine rebuild.

Q4: What are common symptoms of a failed head gasket on a 6HK1?
A4: Persistent engine overheating, continuous coolant loss with no visible external leak, milky oil (coolant mixed with oil), white smoke from exhaust, exhaust bubbles in radiator, and poor engine performance.

Q5: How many head gaskets are required for a 6HK1 engine?
A5: One cylinder head gasket is required. The 6HK1 is an inline 6-cylinder engine with a single cylinder head covering all six cylinders.