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Cylinder Head Gasket 11115-28010 For Toyota Harrier 2AZ-FE 2.4L ACU1# ACU2#
Product Overview
The cylinder head gasket carrying Toyota genuine part number 11115-28010 (also 1111528010) seals the interface between the cylinder head and engine block on the 2AZ-FE 2.4L inline-4 petrol engine. This OE-spec replacement gasket is the factory-correct sealing component for the first-generation Toyota Harrier (ACU1# and ACU2# chassis) — the Japanese-market luxury SUV that shares its powertrain with the Lexus RX.
The 2AZ-FE is a 2,362 cc DOHC 16-valve engine with an 88.5 mm × 96.0 mm bore and stroke, delivering 160 hp (118 kW) at 5,600 rpm and a compression ratio of 9.6:1. This engine was Toyota's primary 2.4L offering from 2000 onwards, powering a range of global models including Camry, RAV4, Highlander, Previa, and the Lexus RX330 (in 2.4L markets).
Part Number:
11115-28010
Product Name:
Cylinder Head Gasket
Car Model:
Toyota Harrier
Engine Model:
Toyota 2AZ-FE 2.4L ACU1# ACU2#
Condition:
100% Brand New
Size:
Standard
Weight:
Standard
Origin:
China Mainland
Main Market:
Middle East, Asia, Africa, South America, North America & Europe
Package:
Neutral Packing Or Make It As Requested
Material:
High-strength aluminum alloy & precision bearings
Cooling Type:
Engine coolant circulation
Installation:
Direct OEM replacement
Quality Standard:
OEM equivalent / ISO quality control
Vehicle Applications
This Toyota 2AZ-FE cylinder head gasket 11115-28010 directly replaces the factory component in the following vehicle configurations:
Chassis / Model
Chassis Codes
Engine
Years
Toyota Harrier (first generation)
ACU1#, ACU2#
2AZ-FE 2.4L
2000-2003 (ACU1#), 2003-2006 (ACU2#)
Toyota Camry / Vista
ACV30, ACV36, SXV30
2AZ-FE 2.4L
2001-2006
Toyota Camry (XV40, XV50)
ACV40, ACV50
2AZ-FE 2.4L
2006-2012
Toyota RAV4
ACA20, ACA21, ACA22, ACA33, ACA38
2AZ-FE 2.4L
2001-2012
Toyota Highlander (KXU40)
GSU40, 4-cyl
2AZ-FE 2.4L
2001-2007
Toyota Previa / Estima (ACR30, ACR40)
ACR30, ACR40
2AZ-FE 2.4L
2000-2005
Toyota Avensis Verso / Ipsum
ACM20, ACM26
2AZ-FE 2.4L
2001-2005
Toyota Corolla (E120, E130)
ZZE122, ZZE124
2AZ-FE 2.4L
2001-2007
Toyota Matrix
XR 2.4L variant
2AZ-FE 2.4L
2003-2006
Toyota Scion tC
AT10
2AZ-FE 2.4L
2004-2010
Toyota Solara
--
2AZ-FE 2.4L
2003-2008
Lexus RX330 / RX350
MCU33 (2.4L markets)
2AZ-FE 2.4L
2003-2006
The ACU1# chassis code covers the first-generation (2000-2003) Toyota Harrier with the 2AZ-FE engine; the ACU2# code covers the facelifted version (2003-2006). Across all these platforms, the 2AZ-FE engine architecture — cylinder bore spacing, water jacket passages, and bolt pattern — remains identical, making the 11115-28010 gasket the correct direct replacement for the entire 2AZ-FE family from 2000 through the early 2010s.
Common Failure Patterns & Diagnosis
The Toyota 2AZ-FE engine has three well-documented failure scenarios directly related to the head gasket and cylinder head bolt system:
1. 2AZ-FE Cylinder Head Bolt Failure - TSB 0015-11
Early 2AZ-FE engines (approximately 2002-2006 production) are known to experience cylinder head bolt failure due to a design flaw in the torque-to-yield (stretch) bolts. The bolts lose clamping force over time, allowing the cylinder head to lift slightly under combustion pressure. This often begins as intermittent compression loss between cylinders 2 and 3 and progresses to full head gasket failure with combustion gases entering the cooling system. Toyota released Technical Service Bulletin (TSB) 0015-11 in March 2011 to address this issue. When repairing such an engine, both the head gasket and cylinder head bolts must be replaced — the original bolts are single-use and cannot be reused.
2. Head Gasket Failure from Engine Overheating
When a 2AZ-FE engine overheats (typically from a failed water pump, stuck thermostat, or low coolant), the aluminium cylinder head can warp. In severe cases, the head will pull the cylinder head bolts straight out of the block threads. A warped head must be resurfaced — which changes the piston-protrusion measurement — requiring a thicker MLS head gasket (such as the Cometic 0.040″ variant) to restore correct compression height. For most standard rebuilds where overheating has not occurred, the 0.4 mm OE gasket is the correct choice.
3. Gradual Gasket Degradation from Age and Mileage
In high-mileage 2AZ-FE engines (exceeding 200,000 km), the original head gasket's elastomer coating can harden and lose its ability to conform to minor surface irregularities, leading to gradual coolant loss, pressurised cooling system hoses, or milky oil without catastrophic failure. Replacing the gasket with this fresh OE-spec MLS unit restores the original sealing interface.
Recommended Replacement Indicators
Symptom
Diagnosis
Coolant loss requiring top-ups every 500-1,000 km with no visible external leak
Coolant escaping past the fire ring into the combustion chamber
White or grey steam from the exhaust that continues after the engine is warm
Coolant burning in the combustion chamber — head gasket breach
Bubbles in the coolant overflow bottle with the engine running
Definitive sign: combustion gases entering the cooling system
Pressure in the cooling system — hoses remain hard even when the engine is cold
Milky oil residue under the filler cap or on the dipstick
Coolant has mixed with the engine oil — internal gasket failure
Misfire codes (P0301-P0304) with no other ignition or fuel cause
Coolant in the combustion chamber affecting compression
Unexplained engine overheating or loss of power under load
Combustion gases interfering with cooling system pressure or flow
Important distinction for parts distributors: The 2AZ-FE head gasket failure pattern is distinct from the 1AZ-FE or 3AZ-FE engines. The 11115-28010 gasket is specifically dimensioned for the 2AZ-FE's 88.5 mm piston diameter and 90 mm gasket bore. Installing a gasket intended for the 1AZ-FE (1,998 cc, smaller bore) will result in sealing failure.
Features & Benefits
Multi-Layer Steel (MLS) Construction — Proven for aluminium-aluminium engines with stainless steel fire rings designed for 90 mm bore diameter
0.4 mm Compressed Thickness — OE factory specification for standard 2AZ-FE engines
Precision 90 mm Fire Ring Alignment — Ensures gas-tight sealing around combustion chambers
Elastomer Coating — No additional sealants required during installation
Direct OE Cross-Reference — Toyota part number 11115-28010 with related OE numbers 11115-28011, 11115-28012, 11115-28013, and 11115-28040
Part of Complete Engine Overhaul System — Included in 04111-28056 full engine overhaul gasket set
IATF 16949 / ISO 9001 Certified Manufacturing — Automotive industry's highest quality standards with full traceability
Quality Control & Verification
QC Item
Verification Method
Fire ring bore alignment
Laser measurement — 90.0 mm ±0.03 mm tolerance
Gasket thickness (compressed)
Digital micrometer at 6 points — verified against 0.4 mm OE specification
Layer registration
Optical inspection — all MLS layers align within 0.2 mm of OE drawing
Visual and adhesion test — no voids, cracks, or missing coating
Full dimensional inspection
CMM measurement — bolt hole alignment, water jacket, oil ports
Anti-corrosion treatment
VCI (Vapor Corrosion Inhibitor) sealed bag for long-term storage
A certificate of conformance (COC) with batch material analysis is available for wholesale orders.
Packaging & Supply
Individual packaging: Sealed in anti-static VCI bag, foam-lined carton
Carton dimensions: Approximately 45 × 25 × 2 cm (18 × 10 × 1 inch)
Net weight: Approximately 0.4-0.6 kg
Master carton: 50 units per export carton (palletisable)
Lead time: 3-7 working days for stock orders; 15-25 days for production orders above 200 pieces
Minimum order quantity: 1 piece (sample order available)
Shipping methods: FedEx, UPS, DHL for sample quantities; sea freight (LCL/FCL) from Shanghai, Ningbo, or Guangzhou ports
H/S Code: 8484.10
For workshops performing a full top-end service, the supplier also stocks matching 2AZ-FE torque-to-yield cylinder head bolts (part number 90910-02170), valve-stem seal sets, rocker cover gaskets, and intake manifold gaskets for the same engine family.
Quick Summary & Installation Guidance
IMPORTANT: The 2AZ-FE uses torque-to-yield (stretch) cylinder head bolts. These are single-use fasteners and must be replaced whenever the cylinder head is removed. Reusing old bolts risks uneven clamping, head gasket failure, and cylinder head warping.
Installation Guidelines
Confirm the gasket thickness before ordering. The standard specification for this engine family is 0.4 mm. If the cylinder head has been resurfaced during a prior repair — or if piston protrusion measurements are outside the normal range — a different thickness may be required.
Always replace cylinder head bolts with new genuine-spec bolts. Torque-to-yield bolts cannot be reused. Follow the Toyota workshop manual for the correct tightening sequence: staged torque values followed by precise angle turns using an angle wrench.
Check the cylinder head and block surfaces for warpage using a precision straight edge and feeler gauge. The 2AZ-FE specification for head flatness is ≤0.05 mm across the full length.
Clean and chase all bolt holes in the cylinder block to remove debris and old thread sealant. Compressed air must be used to clear each hole before bolt installation.
Install the gasket dry — no additional sealants. The MLS gasket's elastomer coating is heat-activated and must make direct contact with clean, oil-free surfaces to bond correctly.
Flush the cooling system and fill with fresh Toyota Super Long Life Coolant (red) or Long Life Coolant (green) mixed 50/50 with distilled water.
Consider professional installation. Head gasket replacement on the 2AZ-FE requires specialised tools and expect 6-8 hours of labour in a professional workshop.
The Toyota cylinder head gasket 11115-28010 is an OE-specification MLS (multi-layer steel) replacement for the 2AZ-FE 2.4L petrol engine. Stainless steel fire rings sized to the 90 mm gasket bore, elastomer coating, and a compressed thickness of 0.4 mm deliver gas-tight sealing under the engine's 9.6:1 compression ratio. IATF 16949 certified.
Yimi(Guangzhou) Automotive Parts Co,Ltd
located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality automotiv... Yimi(Guangzhou) Automotive Parts Co,Ltd
located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality automotiv...
