8-97144986-0 ISUZU Cylinder Head Gasket NKP NPR ISUZU Truck Parts

Product Specification

8-97144986-0 Cylinder Head Gasket for ISUZU NKP NPR

1. Quick Notice

Confirm the OEM number 8-97144986-0 on your original gasket before ordering. This MLS cylinder head gasket fits Isuzu 4HG1 and 4HG1T engines in NPR/NKR/NQR trucks. Professional installation required. Multiple thicknesses available — select by piston protrusion measurement.

2. Description

The 8-97144986-0 is an OE-spec Multi-Layer Steel (MLS) cylinder head gasket for Isuzu 4HG1 4.6L four-cylinder turbo diesel engines. Engine features 105mm bore, 125mm stroke, 4,777cc displacement, 17.5:1 compression ratio, 135–145 hp output. MLS construction uses multiple stainless steel layers with embossed sealing beads, distributing pressure evenly to withstand extreme combustion pressure while preventing coolant and oil cross-contamination. Fits Isuzu NPR71, NKR71, NQR71, ELF models with 4HG1 and 4HG1T engines (1992–2003). Common failure symptoms include external coolant seepage, persistent engine overheating, white exhaust smoke, milky engine oil, and exhaust bubbles in radiator.

3. Parameters Table

4. Custom Content

Thickness Selection: Isuzu offers 3 different head gasket thicknesses. Measure piston protrusion above block deck and select by the smallest measurement. The OEM gasket appears as multiple thin stainless steel sheets sandwiched together.

Cylinder Head Bolt Torque: M14 bolts — Step 1: 98 Nm, Step 2: 147 Nm, Step 3: +30–60 degrees angle torque. Always replace head bolts with new units.

Surface Preparation: Clean both surfaces with a plastic scraper. No abrasive discs. MLS gaskets require smooth finish and install dry — do not use any sealant.

5. FAQ (One by One Question and Answer)

Q1: Which Isuzu trucks use the 8-97144986-0 gasket?
A1: Fits Isuzu NPR71, NKR71, NQR71, and ELF trucks with 4HG1 and 4HG1T engines (1992–2003).

Q2: Is this an MLS cylinder head gasket?
A2: Yes. Multi-Layer Steel construction with embossed sealing beads for superior sealing under turbocharged diesel pressures.

Q3: What thickness gasket do I need?
A3: Measure piston protrusion above the block deck. Isuzu offers 3 different thicknesses — select by the smallest measurement. Refer to workshop manual.

Q4: What are common head gasket failure symptoms on a 4HG1?
A4: External coolant seepage at the head joint, persistent engine overheating, white exhaust smoke, milky oil, and exhaust bubbles in radiator.

Q5: Does this gasket require sealant during installation?
A5: No. MLS head gaskets seal without additional sealant. Install dry on clean, properly prepared surfaces.

Q6: Is 8-97144986-0 a full gasket set or individual component?
A6: 8-97144986-0 is a single cylinder head gasket. 8-97144-986-0 is the full overhaul gasket set containing multiple components. Do not confuse these part numbers.

Q7: What is the cylinder head bolt torque specification for the 4HG1?
A7: M14 bolts — Step 1: 98 Nm, Step 2: 147 Nm, Step 3: +30–60 degrees angle torque. Replace head bolts with new torque-to-yield units.

Q8: Does this gasket fit the 4HG1T engine?
A8: Yes. Compatible with both 4HG1 naturally aspirated and 4HG1T turbocharged variants.

Q9: How do I properly prepare surfaces before installation?
A9: Clean both cylinder head and engine block with a plastic scraper. No abrasive discs or wire brushes. Check head flatness per workshop manual.

 

Q10: What vehicles use the 4HG1 engine with this gasket?
A10: Isuzu NPR71, NKR71, NQR71 trucks, ELF series, and various commercial vehicles (1992–2003 model years).