XR857983 Jaguar AJ133 Engine Left Cylinder Head Gasket

The XR857983 is a premium-quality left bank cylinder head gasket engineered specifically for Jaguar vehicles. Designed as a direct OEM replacement, this multi-layer steel (MLS) gasket ensures precise sealing between the cylinder head and engine block, preventing leaks and maintaining optimal combustion pressure.

Key Features

1. OEM Compatibility

   • Exact fit for Jaguar models equipped with 5.0L V8 engines (AJ133 series).

   • Left-side specific design accounting for asymmetric thermal expansion.

2. Advanced MLS Construction

   • 3-layer steel core with elastic polymer coating for superior conformity to surface imperfections.

   • Laser-welded alignment tabs prevent layer shifting during installation.

3. High-Performance Sealing

   • Withstands temperatures up to 1000°C and combustion pressures over 200 bar.

   • Functional rubber coating ensures micro-sealing around coolant/oil passages.

4. Durability Enhancements

   • Stainless steel layers resist corrosion from coolant and oil additives.

   • Anti-stick surface treatment prevents material adhesion during future repairs.

Compatible Vehicles

VIN verification recommended for exact compatibility.

Why Choose This Product?

1. Jaguar-OEM Equivalent: Meets original equipment dimensions and performance standards.
2. Precision Engineering: Left-bank specific design ensures correct thermal expansion management.
3. Leak Prevention: Combines mechanical sealing (MLS beads) and chemical sealing (polymer coating).
4. Long Service Life: Outperforms aftermarket gaskets in durability tests by 40% under thermal cycling.

Installation Notes

1. Requires strict adherence to Jaguar’s torque sequence and specifications.
2. Replace cylinder head bolts concurrently (recommended).
3. Use OEM-approved sealants only where specified.