DA2141 Head Bolt Kit V8 4.0 4.6 Discovery 2 Range Rover P38
The cylinder head bolts are among the most critically loaded fasteners in any engine, and on the Rover V8 they carry a heavy responsibility. Securing the cylinder heads to the block, these bolts must maintain precise clamping force to keep the head gasket properly sealed under the heat and pressure cycles of combustion. When head gasket work is performed on a 4.0L or 4.6L V8, replacing the head bolts is not optional; it is expected. These bolts are torqued to specification on assembly and are considered a one-time-use fastener in professional engine rebuild practice. Reusing stretched or fatigued bolts risks an uneven clamp load, which is one of the leading causes of head gasket failure shortly after a rebuild.
The DA2141 Head Bolt Kit is a complete set covering one cylinder head and is designed to fit the Land Rover Discovery 2 (L318, 1999 to 2004) and the Range Rover P38A (1994 to 2002), both in 4.0L and 4.6L V8 petrol/gas configurations. The kit brings together the two bolt types used across the Rover V8 head: the shorter bolt measuring 7/16 UNC x 2.6 in (66.0 mm) and the longer bolt measuring 7/16 UNC x 3.78 in (96.0 mm). These two lengths accommodate the varying depth of the head bolt bosses across the block deck. Having both lengths in a single kit ensures you have exactly what you need for a proper, complete assembly without hunting down individual part numbers separately.
Whether you are replacing a blown head gasket, performing a full engine rebuild, or refreshing a high-mileage Rover V8 that has been showing signs of coolant loss or compression issues, starting with a fresh set of head bolts is the correct approach. This kit is ideally paired with a quality head gasket set for a complete and thorough top-end repair.
Part Number: DA2141
Free shipping availible to the lower 48!
Supersession Part Numbers
ERR2943 and ERR2944 are the component bolt numbers within the kit.
FAQ
Which Land Rover models and engines does DA2141 fit?
This head bolt kit fits the Land Rover Discovery 2 (L318, 1999 to 2004) and the Range Rover P38A (1994 to 2002), specifically on the 4.0L and 4.6L V8 petrol/gas engines. It does not apply to diesel variants or any other engine family. Always confirm your engine code and displacement before ordering.
Does this kit include bolts for both cylinder heads?
The DA2141 kit covers one cylinder head. For a complete engine rebuild involving both heads, you will need two kits to properly replace all head bolts on both sides of the Rover V8. This ensures a fresh, correctly specified bolt is used at every position for both heads.
Why should I replace head bolts instead of reusing the originals?
Cylinder head bolts on the Rover V8 are torqued to a precise specification during assembly, which stretches them slightly as part of the clamping process. Reusing bolts that have already been torqued risks an uneven or insufficient clamp load on reassembly, which can lead to premature head gasket failure. Replacing them with a new set as part of any head gasket job is the correct and recommended practice.
The cylinder head bolts are among the most critically loaded fasteners in any engine, and on the Rover V8 they carry a heavy responsibility. Securing the cylinder heads to the block, these bolts must maintain precise clamping force to keep the head gasket properly sealed under the heat and pressure cycles of combustion. When head gasket work is performed on a 4.0L or 4.6L V8, replacing the head bolts is not optional; it is expected. These bolts are torqued to specification on assembly and are considered a one-time-use fastener in professional engine rebuild practice. Reusing stretched or fatigued bolts risks an uneven clamp load, which is one of the leading causes of head gasket failure shortly after a rebuild.
The DA2141 Head Bolt Kit is a complete set covering one cylinder head and is designed to fit the Land Rover Discovery 2 (L318, 1999 to 2004) and the Range Rover P38A (1994 to 2002), both in 4.0L and 4.6L V8 petrol/gas configurations. The kit brings together the two bolt types used across the Rover V8 head: the shorter bolt measuring 7/16 UNC x 2.6 in (66.0 mm) and the longer bolt measuring 7/16 UNC x 3.78 in (96.0 mm). These two lengths accommodate the varying depth of the head bolt bosses across the block deck. Having both lengths in a single kit ensures you have exactly what you need for a proper, complete assembly without hunting down individual part numbers separately.
Whether you are replacing a blown head gasket, performing a full engine rebuild, or refreshing a high-mileage Rover V8 that has been showing signs of coolant loss or compression issues, starting with a fresh set of head bolts is the correct approach. This kit is ideally paired with a quality head gasket set for a complete and thorough top-end repair.
Part Number: DA2141
Free shipping availible to the lower 48!
Supersession Part Numbers
ERR2943 and ERR2944 are the component bolt numbers within the kit.
FAQ
Which Land Rover models and engines does DA2141 fit?
This head bolt kit fits the Land Rover Discovery 2 (L318, 1999 to 2004) and the Range Rover P38A (1994 to 2002), specifically on the 4.0L and 4.6L V8 petrol/gas engines. It does not apply to diesel variants or any other engine family. Always confirm your engine code and displacement before ordering.
Does this kit include bolts for both cylinder heads?
The DA2141 kit covers one cylinder head. For a complete engine rebuild involving both heads, you will need two kits to properly replace all head bolts on both sides of the Rover V8. This ensures a fresh, correctly specified bolt is used at every position for both heads.
Why should I replace head bolts instead of reusing the originals?
Cylinder head bolts on the Rover V8 are torqued to a precise specification during assembly, which stretches them slightly as part of the clamping process. Reusing bolts that have already been torqued risks an uneven or insufficient clamp load on reassembly, which can lead to premature head gasket failure. Replacing them with a new set as part of any head gasket job is the correct and recommended practice.
Description
The cylinder head bolts are among the most critically loaded fasteners in any engine, and on the Rover V8 they carry a heavy responsibility. Securing the cylinder heads to the block, these bolts must maintain precise clamping force to keep the head gasket properly sealed under the heat and pressure cycles of combustion. When head gasket work is performed on a 4.0L or 4.6L V8, replacing the head bolts is not optional; it is expected. These bolts are torqued to specification on assembly and are considered a one-time-use fastener in professional engine rebuild practice. Reusing stretched or fatigued bolts risks an uneven clamp load, which is one of the leading causes of head gasket failure shortly after a rebuild.
The DA2141 Head Bolt Kit is a complete set covering one cylinder head and is designed to fit the Land Rover Discovery 2 (L318, 1999 to 2004) and the Range Rover P38A (1994 to 2002), both in 4.0L and 4.6L V8 petrol/gas configurations. The kit brings together the two bolt types used across the Rover V8 head: the shorter bolt measuring 7/16 UNC x 2.6 in (66.0 mm) and the longer bolt measuring 7/16 UNC x 3.78 in (96.0 mm). These two lengths accommodate the varying depth of the head bolt bosses across the block deck. Having both lengths in a single kit ensures you have exactly what you need for a proper, complete assembly without hunting down individual part numbers separately.
Whether you are replacing a blown head gasket, performing a full engine rebuild, or refreshing a high-mileage Rover V8 that has been showing signs of coolant loss or compression issues, starting with a fresh set of head bolts is the correct approach. This kit is ideally paired with a quality head gasket set for a complete and thorough top-end repair.
Part Number: DA2141
Free shipping availible to the lower 48!
Supersession Part Numbers
ERR2943 and ERR2944 are the component bolt numbers within the kit.
FAQ
Which Land Rover models and engines does DA2141 fit?
This head bolt kit fits the Land Rover Discovery 2 (L318, 1999 to 2004) and the Range Rover P38A (1994 to 2002), specifically on the 4.0L and 4.6L V8 petrol/gas engines. It does not apply to diesel variants or any other engine family. Always confirm your engine code and displacement before ordering.
Does this kit include bolts for both cylinder heads?
The DA2141 kit covers one cylinder head. For a complete engine rebuild involving both heads, you will need two kits to properly replace all head bolts on both sides of the Rover V8. This ensures a fresh, correctly specified bolt is used at every position for both heads.
Why should I replace head bolts instead of reusing the originals?
Cylinder head bolts on the Rover V8 are torqued to a precise specification during assembly, which stretches them slightly as part of the clamping process. Reusing bolts that have already been torqued risks an uneven or insufficient clamp load on reassembly, which can lead to premature head gasket failure. Replacing them with a new set as part of any head gasket job is the correct and recommended practice.
