8980555410 8-98055541-0 Cylinder Head Gasket 700P Isuzu 4HK1 Head Gasket

Cylinder Head Gasket For Isuzu 700P 4HK1 8980555410 8-98055541-0

1. Quick Notice

Confirm the OEM number 8980555410 or 8-98055541-0 on your original cylinder head gasket and engine code (4HK1) before ordering. This gasket is available in multiple thickness grades depending on piston protrusion. Professional diesel technician required for installation. Always replace head bolts with new units.

2. Description

The 8980555410 / 8-98055541-0 cylinder head gasket is an OE-specification sealing component for Isuzu 4HK1 series 5.2L four-cylinder turbo diesel engines. Constructed from Multi-Layer Steel (MLS) with precision-embossed sealing beads for superior heat and pressure resistance. The 4HK1 engine features cast iron block, 115 mm bore × 125 mm stroke, 5,193 cc displacement. Compression ratio varies by model year: 18.5:1 (2005–2006), 17.5:1 (2007–2015), or 16.5:1 (2016–2020). Applications include Isuzu 700P trucks, N-Series, NPR, NQR, as well as Hitachi excavators and various heavy equipment. MLS gaskets require smooth, clean sealing surfaces and are single-use components that must be replaced whenever the cylinder head is removed. Common failure symptoms include external coolant seepage at the head joint, persistent engine overheating, white exhaust smoke, milky oil, compression loss, and exhaust bubbles in the radiator overflow tank.

3. Parameters Table

4. Custom Content

Thickness Selection: The 4HK1 engine uses three different head gasket thicknesses depending on piston protrusion. Hole punch marks on the gasket edge indicate thickness grade. Measure piston protrusion at TDC to determine correct gasket. Failure to select correct thickness may cause piston-to-head or piston-to-valve contact.

MLS Construction: Multi-Layer Steel gaskets consist of multiple precision-stamped stainless steel layers with elastomer coating. The embossed steel layers function as load-controlled springs, maintaining consistent sealing pressure across the interface under thermal cycling.

Surface Preparation: Both cylinder head and block surfaces must be thoroughly cleaned with a plastic scraper. Do not use abrasive discs or wire brushes. MLS gaskets require a smooth surface finish for proper sealing.

Installation Notes: Replace all head bolts with new torque-to-yield (TTY) units — reused bolts have permanent stretch. Install gasket dry on clean surfaces with part number facing upward and toward the left of the engine. Align cylinder body dowels with cylinder head dowel holes before placement. Refill cooling system with correct coolant mixture and bleed air after installation.

5. FAQ

Q1: Which Isuzu engines use the 8980555410 cylinder head gasket?
A1: This gasket fits Isuzu 4HK1, 4HK1-TC, 4HK1-TCN, and 4HK1X 5.2L four-cylinder turbo diesel engines.

Q2: Are 8980555410 and 8-98055541-0 the same gasket?
A2: Yes. Both numbers reference the identical cylinder head gasket. 8-98055541-0 is the OEM hyphenated format; 8980555410 is the condensed form.

Q3: What thickness cylinder head gasket do I need?
A3: Selection is determined by measuring piston protrusion from the cylinder block at TDC. The correct gasket thickness is identified by hole punch marks on the gasket edge. Refer to the Isuzu service manual for the measurement procedure.

Q4: What are common head gasket failure symptoms on a 4HK1?
A4: External coolant seepage at the head joint, persistent engine overheating, white exhaust smoke, milky oil (coolant-oil mixing), compression loss, rough idle, and exhaust bubbles in the radiator overflow tank.

Q5: Is sealant required for installation?
A5: No. MLS cylinder head gaskets seal without additional sealant. Install the gasket dry on clean, properly prepared surfaces. Do not apply gasket sealant or RTV silicone.

Q6: What vehicles use the 4HK1 engine?
A6: The 4HK1 engine is found in Isuzu 700P trucks, N-Series, NPR, NQR, as well as Hitachi excavators including ZX200-3, ZX330, ZX350H, ZX350K, and various heavy equipment applications.

Q7: Is this a Multi-Layer Steel (MLS) gasket?
A7: Yes. This gasket features MLS construction with multiple precision-stamped stainless steel layers and elastomer coating for superior sealing performance under extreme cylinder pressures.