Description
Part#: ALL-65087
Manufacturer: Jaguar
Year Range: 68-87
Engine Size: 4.2L - 258ci - L6 - 12V - DOHC
Description: 68-87 Jaguar 4.2L 258ci L6 Dohc 12V - XJ6 Cylinder Head
This Cylinder Head has a core charge of $100.00 included in the cost. This charge is FULLY REFUNDED upon return. We will include a prepaid label for the return freight.
The 68-87 Jaguar 4.2L 258ci L6 DOHC 12V XJ6 Cylinder Head stands as a testament to Jaguar's commitment to excellence in engineering and performance. For enthusiasts and owners of classic Jaguars spanning from 1968 to 1987, this cylinder head represents the pinnacle of quality and reliability. The purpose of this component is to increase Jaguar's performance and longevity, so let's explore why it's a must-have.
At the heart of every Jaguar engine lies its cylinder head, a critical component responsible for combustion chamber formation, valve actuation, and overall engine performance. Jaguar, renowned for its precision engineering and dedication to performance, has meticulously this cylinder head to not just meet but exceed OEM specifications. This means that owners can expect nothing short of perfection in fit, function, and durability.
The 4.2L 258ci L6 DOHC 12V configuration of this cylinder head is engineered for excellence. The inline-six design provides a balance of power, smoothness, and efficiency, characteristics that define the driving experience in classic Jaguars. Whether you're cruising along the open road or pushing your Jaguar to its limits on the track, this cylinder head ensures that your engine delivers optimal performance under any condition.
Its focus on durability and performance sets this cylinder head apart. Jaguar understands the demands placed on classic cars, especially those with a storied racing heritage like the XJ6. That's why they've spared no expense in ensuring that this cylinder head withstands the test of time while delivering the power and efficiency expected from a Jaguar engine.
Part number ALL-65087 simplifies the process of identifying and acquiring this essential component for your Jaguar. With this number, owners can rest assured that they're getting a genuine Jaguar product designed specifically for their vehicle. This streamlined approach not only ensures compatibility but also facilitates hassle-free installation, allowing owners to get back on the road and enjoy their Jaguar to the fullest.
But it's not just about performance; it's about preserving the legacy of Jaguar's craftsmanship and engineering excellence. By investing in the 68-87 Jaguar 4.2L 258ci L6 DOHC 12V XJ6 Cylinder Head, owners are not just upgrading their cars; they're upholding a tradition of automotive excellence that spans decades. Each cylinder head carries with it the heritage and prestige of the Jaguar brand, adding value and distinction to every classic Jaguar's power.
For enthusiasts restoring a classic Jaguar to its former glory, the Jaguar cylinder head is an essential component that ensures authenticity and performance. And for owners of modern-day Jaguars looking to enhance their driving experience, it's a gateway to unlocking the full potential of their vehicle. It's a Jaguar experience like no other when you choose quality, reliability, and unrivaled driving fun.
As a result, the 68-87 Jaguar 4.2L 258ci L6 DOHC 12V XJ6 Cylinder Head represents the epitome of excellence in automotive engineering. From its precision craftsmanship to its uncompromising performance, this cylinder head embodies everything that makes Jaguar legendary. So why settle for anything less? Elevate your Jaguar to new heights of performance and prestige with the best—invest in Jaguar. Explore our Cylinder heads collection.
Compatible Vehicle
| MAKE | MODEL | YEAR | ENGINE |
|---|---|---|---|
| Jaguar | XJ6 | 1972-1974 | 4.2L 4235CC 258Cu. In. l6 GAS DOHC |
| Jaguar | XJ6 | 1975-1987 | 4.2L 4235CC l6 GAS DOHC |
Not sure this is your casting? Call 866-766-9955 with your casting number and your vehicle's year, make and engine, and we'll confirm it before you buy.
Process & Warranty
Cylinder Head Rebuilding Process
1. Initial Inspection: As a unit comes to our shop, we give it an initial inspection to determine whether there is any reason the head should not proceed to rebuilding. This quickly catches problems such as cracks, casting damage and other conditions that would halt the process for that casting.
2. Teardown: The cylinder head is fully disassembled, which reveals other areas of potential damage to the casting. The parts and the head are separated and go through different cleaning processes.
3. Cleaning: Cast iron heads are cleaned in a thermal cleaning system — baked at 600° to reduce grease and oil to ash, then put through a steel-shot machine for a brilliant finish. Aluminum heads are baked at a lower temperature or put through a high-pressure wash, then glass-beaded.
4. Head Inspection: After cleaning, heads are pressure tested or Magnafluxed to find any cracks. All bolt holes, valve guides, valve seats and other areas are inspected for broken bolts, broken taps, cracked guides and other impairments. Straightness and cam bore wear are also checked.
5. Machining: All heads have guides installed to meet OE conditions and are resurfaced to far exceed factory specifications for surface finish. A three-angle valve job achieves valve seat runout under .001". Valves are ground for a perfect seal between valve and seat.
6. Assembly: New OE-style valve guide seals are installed. Springs are tested for proper seat pressure. Valve seat sealing is vacuum-checked for an airtight fit. Lifters are bled and rebuilt for zero lash after startup. Cams are polished and clearances are checked twice to meet OE oil clearances.
7. Final Inspection: Every head is visually inspected — surface finish, lash, bolt holes and all other areas — to ensure a quality cylinder head.
Questions about our cylinder head services? Call 1-866-766-9955.
Warranty — 12 months from purchase
Match the head before installation. We will not warranty an incorrectly installed head. Call us immediately with any questions or concerns about your purchase.
First 3 months:
- Repair or replacement of the cylinder head.
- Gasket set supplied for reinstallation.
- Labor calculated from book time at $25.00 per hour, up to a maximum of 10 hours.
- Replacement of fluids and filters.
Remaining 9 months:
- Repair or replacement of the cylinder head.
- Gasket set supplied for reinstallation.
- Replacement of fluids and filters.
- No labor is covered.
Warranty is void if:
- The head was improperly installed.
- The head was overheated (heat tab melted or missing).
- The head received insufficient oiling.
- The cooling system operated improperly.
Warranty returns must be sent to Allied Motor Parts uncleaned and fully assembled — any disassembly voids the warranty — and must be accompanied by proof of purchase. There is no warranty on threaded bolt holes after installation.
This warranty is in lieu of any other warranty, expressed or implied, including any implied warranty of merchantability or fitness for a particular purpose.
Quality Assurance
Here’s why our cylinder heads stand out:
Thorough Inspection: Every head undergoes a complete teardown, cleaning, and detailed inspection for cracks and imperfections.
Advanced Cleaning: Thermal cleaning for cast iron and high-pressure washing for aluminum ensures a brilliant finish.
Precision Machining: CBN resurfacing, triple-angle valve cuts, and guide installations exceed OEM specifications.
Rigorous Testing: Vacuum tests, tension checks, and pressure tests guarantee performance and durability.
High-Quality Components: New seals, plugs, and rebuilt lifters ensure optimal functionality.
Final Assurance: Each head is inspected, stamped, and stored in a climate-controlled environment.
Wide Availability: Over 2,000 cylinder heads for all makes and models, ready for repair or exchange.