Womala Cylinder Head Bolt LR026143 for Land Rover

Product Overview

The Cylinder Head Bolt LR026143 is a critical engine fastener engineered for for Land Rover and for Jaguar vehicles equipped with 3.0L V6 and 5.0L V8 petrol engines (AJ126 / AJ133) . Also known as a cylinder head bolt set, this high-tensile M11x1.5x178mm fastener secures the cylinder head to the engine block, maintaining proper clamping force under extreme pressure and temperature conditions . AJ812892 is the Jaguar equivalent part number .

Key Features

• High-strength construction – designed to withstand extreme cylinder pressures and temperature cycling

• Precision M11x1.5x178mm thread – factory-spec dimensions 

• Torque-to-yield design – must be replaced whenever removed; cannot be reused

• OE-grade quality – genuine Land Rover / Jaguar specification; available from OE suppliers including Elring, Britpart, and Eurospare 

• Sold individually – required quantity per engine: 10 bolts for V8, 8 bolts for V6 

OE Cross-Reference

Vehicle Fitment

⚠️ Important: This bolt is for 3.0L V6 and 5.0L V8 petrol engines only – not for diesel or 2.0L variants. Required quantity: 8 bolts for V6 , 10 bolts for V8 . VIN-specific cut-offs apply for certain applications .

Signs of Failure / When to Replace

• Always replace when removed – these are torque-to-yield bolts and cannot be reused

• Engine overheating – may indicate compromised head gasket sealing

• Coolant in oil or oil in coolant – head gasket failure due to inadequate clamping

• Loss of compression – cylinder head not properly secured

💡 Cylinder head bolts are single-use, torque-to-yield fasteners. They must be replaced with new bolts every time the cylinder head is removed. Using old bolts can lead to insufficient clamping force and head gasket failure.

Critical – Verify Your VIN Before Ordering

Cylinder head bolts are VIN‑, engine‑, and production‑specific. VIN cut-offs apply for certain applications . Provide your VIN – our team confirms exact compatibility and correct quantity before dispatch. We cannot accept returns for misordered parts without VIN verification.

💡 Installation Tip: Professional installation required. New bolts must be installed dry and torqued to manufacturer specifications in the correct sequence. Clean all bolt holes thoroughly before installation. Replace the head gasket simultaneously.

Technical Specifications

Why Choose Us

Contact us for bulk orders or VIN‑checked quotes.

Specifications subject to change; images for reference only.Aftermarket replacement – not affiliated with Jaguar Land Rover.

Frequently Asked Questions

• Extensive Industry Experience: 13 years specializing in Auto Parts auto parts with precise product matching and technical solutions.
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