Description
Part#: ALL-11311NL
Condition: NEW - Exceeds OEM Specifications
Manufacturer: Jeep
Year Range: 99-03
Engine Size: 4.0L - 242ci - L6
Description: 99-03 AMC Jeep 4.0L L6 242ci 331 Cylinder Head - NEW
When it comes to enhancing the performance and reliability of your Jeep, there’s no better choice than the new 99-03 AMC Jeep 4.0L L6 242ci 331 Cylinder Head, available at Alliedmotorparts. This cylinder head, specifically designed to exceed OEM specifications, is a top-tier replacement part for your 1999-2003 Jeep models, including the 2000 Jeep Cherokee cylinder head and the 1999 Jeep Cherokee 4.0 cylinder head.
Are you experiencing issues with your Jeep’s engine performance? This Jeep 4.0 head is meticulously engineered to deliver outstanding durability and functionality, making it an ideal upgrade for your vehicle. Whether you own a 2000 Jeep Cherokee or another model within the specified range, this Jeep 4.0 cylinder head offers the reliability and performance enhancements you need.
One of the standout features of this Jeep 4.0 heads replacement is its superior craftsmanship. Manufactured by Jeep to the highest industry standards, this cylinder head ensures optimal performance, longevity, and compatibility with your 2000 Jeep Cherokee head. It's not just a part; it's a significant upgrade that breathes new life into your engine.
When you choose this Jeep 4.0 cylinder head, you’re investing in a component that’s built to last. Its robust construction is designed to withstand the rigors of off-road adventures and everyday driving alike. This 1999 Jeep Cherokee 4.0 cylinder head replacement is crafted with precision to ensure it fits perfectly and functions seamlessly within your vehicle's engine system.
At Alliedmotorparts, we understand the importance of reliability and performance for Jeep owners. That's why we offer this high-quality Jeep 4.0 head that not only meets but exceeds your expectations. Whether you’re tackling tough terrains or cruising on highways, this Jeep 4.0 heads replacement ensures your engine runs smoothly and efficiently.
Don’t compromise on quality when it comes to your Jeep. Choose a replacement part that’s trusted and recommended by Jeep enthusiasts and professionals. The 99-03 AMC Jeep 4.0L L6 242ci 331 Cylinder Head is your go-to solution for enhancing your vehicle’s performance, especially if you're looking for a reliable 2000 Jeep Cherokee cylinder head or 1999 Jeep Cherokee 4.0 cylinder head.
Browse our Cylinder head selection, and find the perfect one for your vehicle. Would you like to know if it fits? We offer expert assistance and guidance customized to your needs through our knowledgeable support team. Experience improved engine performance with the Jeep cylinder head, designed for Jeep Cherokee and other compatible models. Upgrade your vehicle today with this top-quality 4.0 head.
Upgrading your engine with this Jeep 4.0 cylinder head from Alliedmotorparts is a smart investment. It’s not just about replacing a part; it’s about restoring and boosting your Jeep’s performance to its peak potential. Equip your vehicle with the best and enjoy the unmatched durability and performance that comes with our expertly crafted cylinder heads. Trust Alliedmotorparts to provide you with top-quality components that keep your Jeep running at its best, ensuring a powerful and reliable driving experience every time.
For any inquiries or support needs, connect with our expert team using our contact form, call us at 866-766-9955, or email sales@alliedmotorparts.com. We are here to help every step of the way. Plus, learn more about cylinder heads by visiting our blog section.
Learn more about Jeep Cylinder Heads.
This Cylinder Head has a core charge of $0.00 included in the cost. This charge is FULLY REFUNDED upon return. We will include a prepaid label for the return freight.
The cylinder head included in this listing will fit the vehicles listed below. It is also important to review/confirm the fitment notes above to ensure the vehicle specifics of the head are correct for your application. If you have any questions that this may not be the correct head for your vehicle or need help in locating the correct head, please contact us via phone or email prior to making a purchase.
Compatible Vehicle
| MAKE | MODEL | YEAR | ENGINE |
|---|---|---|---|
| Jeep | Cherokee | 1998-2001 | 4.0L 242Cu. In. l6 GAS OHV |
| Jeep | Grand Cherokee | 1998-2004 | 4.0L 242Cu. In. l6 GAS OHV |
| Jeep | TJ | 1998-2006 | 4.0L 242Cu. In. l6 GAS OHV |
| Jeep | Wrangler | 1998-2006 | 4.0L 242Cu. In. l6 GAS OHV |
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.
AMC Jeep 4.0L L6 242ci 331 Cylinder Head - NEW, Year:99-03
I took a couple of days To be shipped but when they finally sent it out it arrived in two days time. Well worth the wait though. I am absolutely impressed with its performance the motor I put it on had 200k miles but the bottom end was in near performing order the pistons were still tight with the new head from allied motor parts it runs and performs almost like a brand new motor more power great throttle response. I'd definitely recommend this head to any jeep owner.
Found Allied motor parts online. I needed a complete cylinder head they had a brand new head for a awesome price and a discount. Arrived quickly and packed so well. I installed the cylinder head with no issues. Thanks Allied.
Easy ordering prompt delivery excellent service
Thank you for your order!