Description
Part#: ALL-20147
Manufacturer: Chevrolet
Year Range: 77-78
Engine Size: 4.1L - 250ci - L6
Description: 77-78 Chevy 4.1L 250ci L6 Integrated 1 BBL Carb - 131 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.
Introducing the 77-78 Chevy 4.1L 250ci L6 Integrated 1 BBL Carb - 131 Cylinder Head, engineered to exceed OEM specifications, proudly brought to you by Chrysler/Dodge. Crafted with precision and attention to detail, this cylinder head stands as a testament to quality and performance, tailored for the discerning enthusiast seeking optimal engine functionality and reliability.
At the heart of this marvel lies a dedication to excellence, embodying the spirit of innovation synonymous with the automotive industry. Designed specifically for the revered Chevy 250 inline 6-cylinder engine, this cylinder head seamlessly integrates with your vehicle, ensuring a perfect fit and uncompromising performance.
Crafted for the model years 1977-1978, this cylinder head encapsulates an era of automotive ingenuity, where power and efficiency converged to create an unforgettable driving experience. Whether you're reviving a classic Chevy or boosting the performance of your cherished vintage ride, this cylinder head is primed to exceed your expectations.
Bearing the part number ALL-20147, this cylinder head signifies a commitment to excellence, where every component undergoes rigorous testing and inspection to meet the highest standards of quality assurance. Rest assured, with this cylinder head, you're investing in longevity and durability, poised to withstand the rigors of the road for years to come.
Featuring a 4.1L - 250ci - L6 engine size, this cylinder head unleashes the full potential of your vehicle, unlocking a symphony of power and performance with every turn of the key. Whether you're embarking on a leisurely drive along the vast stretches of the open road or maneuvering through bustling urban landscapes, this cylinder head guarantees a seamless and dynamic driving encounter, taking your expedition to unprecedented levels of excellence.
With its integrated 1 BBL carburetor, this Chevy 250 cylinder head streamlines the engine's air and fuel delivery system, optimizing combustion efficiency and enhancing overall performance. Say goodbye to sluggish acceleration and hello to newfound exhilaration, as the 4.1 Chevy engine breathes new life into your vehicle's engine, transforming it into a powerhouse of a performance.
Constructed to exceed OEM specifications, our Chevy cylinder head undergoes a meticulous process of refurbishment and enhancement, ensuring every component meets or exceeds the original manufacturer's standards. From the cylinder head casting to the valve guides, every detail is scrutinized to deliver uncompromising quality and reliability.
In conclusion, the 77-78 Chevy 4.1L 250ci L6 Integrated 1 BBL Carb - 131 Cylinder Head stands as a testament to automotive excellence, embodying the timeless appeal of classic Chevy engineering. With its superior craftsmanship and unparalleled performance, Our cylinder head is poised to redefine your driving experience, one revolution at a time.
If you need help or have any questions, our expert support team is just a message away! Use our contact form, call us at 866-766-9955, or send an email to sales@alliedmotorparts.com. We're eager to assist you in every way possible. For information on cylinder heads, be sure to check out our blog section.
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.