OEM 1-87811078-2 Cylinder Gasket Kit For ISUZU 6HH1 Head Gasket Kit

Product Specification

Cylinder Gasket for ISUZU 6HH1 OEM 1-87811078-2 Kit

1. Quick Notice

Verify the OEM number 1-87811078-2 on your original gasket kit before ordering. This kit is designed for Isuzu 6HH1 diesel engines. Confirm engine variant (6HH1 naturally aspirated) and vehicle model (FRR, FSR, FTR, FVR, FSS, FTS). Professional installation required. Use new head bolts and follow torque specifications.

2. Description

The 1-87811078-2 cylinder head gasket kit is a precision overhaul set for Isuzu 6HH1 naturally aspirated inline 6-cylinder diesel engines. The 6HH1 features a 115 mm × 132 mm (4.5 in × 5.2 in) bore/stroke with 8,226 cc (8.2 L) displacement and 18.5:1 compression ratio. This full gasket set includes the cylinder head gasket constructed from multi-layer steel (MLS) with heat-resistant coating, valve stem oil seals, intake/exhaust manifold gaskets, oil pan gasket, valve cover gasket, water pump gasket, and all necessary seals for a complete engine overhaul. Compatible vehicles include Isuzu FRR, FSR, FTR, FVR, FSS, and FTS trucks (1996–2003 model years) powered by the 6HH1 engine-25. Common failure symptoms include persistent engine overheating, coolant loss without external leaks, white exhaust smoke, milky oil, and exhaust bubbles in the radiator. 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 must be perfectly clean 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 must not exceed manufacturer specifications-1.

Gasket Orientation: Install the cylinder head gasket with the printed side facing the cylinder head. The 6HH1 uses a single cylinder head covering all six cylinders. Verify orientation marks before tightening-.

Torque Sequence: Tighten cylinder head bolts in the specified sequence (center outward, spiral pattern) using multiple progressive stages-22. Cylinder head bolts typically require approximately 130 Nm (96 lb-ft)-. Always replace head bolts with new units as previous bolts may have permanent stretch from prior torque cycles-.

5. FAQ

Q1: What is included in the 1-87811078-2 gasket kit?
A1: This full overhaul gasket kit includes the cylinder head gasket, valve stem oil seals, intake manifold gasket, exhaust manifold gasket, oil pan gasket, valve cover gasket, water pump gasket, and all necessary seals for a complete engine rebuild.

Q2: Which Isuzu vehicles use the 6HH1 engine?
A2: The 6HH1 engine is found in Isuzu FRR, FSR, FTR, FVR, FSS, and FTS medium-duty trucks from approximately 1996 to 2003 model years-25.

Q3: What are the key specifications of the Isuzu 6HH1 engine?
A3: The 6HH1 is a naturally aspirated inline 6-cylinder diesel engine with 115 mm × 132 mm bore/stroke, 8.2 L displacement, 18.5:1 compression ratio, and output of 180–220 HP at 2,600 rpm--15.

Q4: Is this a Multi-Layer Steel (MLS) gasket?
A4: Yes, the cylinder head gasket features MLS construction with steel alloy body and heat-resistant coating, designed to withstand extreme temperatures and pressures in diesel applications-1.

Q5: How many cylinder head gaskets are needed for the 6HH1 engine?
A5: One cylinder head gasket is required. The 6HH1 is an inline 6-cylinder engine with a single cylinder head covering all six cylinders.

Q6: What is the cylinder head bolt torque specification for the 6HH1?
A6: Cylinder head bolts typically require approximately 130 Nm (96 lb-ft) when torqued in the proper sequence--22. Always refer to the Isuzu service manual for your specific model year.