Gasket Set Engine Overhaul Japanese Truck Engine Parts ISUZU 4JJ1 4JK1 Engine 8-97328887-2

1. Quick Notice

Verify your engine code (4JJ1, 4JJ1-TC, 4JK1, 4JK1-TC) before ordering this overhaul gasket set. Professional installation required. Head gasket thickness selection depends on piston protrusion measurement — refer to service manual.

2. Description

The 8-97328887-2 is a complete engine overhaul gasket set designed for Isuzu 4JJ1 3.0L and 4JK1 2.5L four-cylinder common rail diesel engine. The 4JJ1 features cast iron block, aluminum 16-valve DOHC cylinder head, 95.4 mm bore × 104.9 mm stroke, 2999 cc displacement, and compression ratio ranging from 16.5:1 to 17.5:1 depending on variant. The 4JK1 shares similar 4-cylinder architecture with 2.5L displacement and 18.1:1 compression ratio. This comprehensive set includes cylinder head gasket, valve cover gasket, intake and exhaust manifold gaskets, oil pan gasket, timing cover gaskets, valve stem seals, turbocharger gaskets, and all necessary O-rings for a full engine rebuild. Applications include Isuzu D-Max, MU-X, KB series, NPR, NQR, NKR trucks, Chevrolet Colorado (selected markets), and Isuzu ELF/N-Series commercial vehicle. Common failure symptoms include external oil leaks, coolant seepage, white exhaust smoke, and compression loss. Head gasket available in three thickness grades: 1.05 mm, 1.10 mm, or 1.15 mm based on original identification.

3. Parameters Table

4. Custom Content

Thickness Selection: The 4JJ1 cylinder head gasket is available in three thickness grades — 1.05 mm (one notch), 1.10 mm (two notch), or 1.15 mm (three notch). Selection is determined by measuring piston protrusion above the block deck. Always match the notch count on your original gasket-10.

Surface Preparation: Both cylinder head and block surfaces must be clean and flat. Remove old gasket residue with a plastic scraper. Do not use abrasive discs. Check cylinder head flatness per the Isuzu service manual.

Torque Specification: Tighten cylinder head bolts in the specified sequence using multiple progressive stages. Always replace head bolts with new torque-to-yield units.

No Additional Sealant: Install the gasket dry on clean surfaces. MLS gaskets require no sealant. Do not apply RTV or any gasket sealant to the gasket itself.

5. FAQ

Q1: Which engines does this gasket set fit?
A1: 4JJ1 (3.0L turbo diesel) and 4JK1 (2.5L turbo diesel) engines found in Isuzu D-Max, MU-X, KB Series, NPR, NQR, and NKR trucks.

Q2: What thickness head gasket do I need?
A2: Measure piston protrusion and match the notch count on your original gasket: 1.05 mm (one notch), 1.10 mm (two notch), or 1.15 mm (three notch).

Q3: What are common gasket failure symptoms?
A3: External oil leaks, coolant seepage without visible external leak, white exhaust smoke, compression loss, and milky oil (coolant-oil mixing).

Q4: Do I need new head bolts?
A4: Yes. Always replace cylinder head bolts with new torque-to-yield units. Reusing old bolts may prevent correct clamp load.

Q5: Is sealant required for the head gasket?
A5: No. Install the cylinder head gasket dry on clean, properly prepared surfaces. Do not apply any sealant.