Model: MAIVN-2301F-8 | Brand: KarParts360
This manual provides essential information for the proper installation, operation, and maintenance of your Supertech Black Nitrided Intake Valve set (MAIVN-2301F-8) for Mazda/Ford Duratec 2.0L/2.3L engines. Adhering to these instructions will help ensure optimal performance and longevity of the product. Please read this manual thoroughly before proceeding with any installation or maintenance.
WARNING: Automotive engine work can be complex and dangerous. Improper installation or handling of engine components can lead to serious injury or engine damage. It is highly recommended that installation be performed by a qualified automotive technician.
Always wear appropriate personal protective equipment (PPE) including safety glasses and gloves when working on an engine.

This product may expose you to chemicals known to the State of California to cause cancer and reproductive harm. For more information, visit www.P65warnings.ca.gov.
The Supertech MAIVN-2301F-8 is a set of eight black nitrided intake valves designed for high-performance applications in Mazda/Ford Duratec 2.0L/2.3L engines. These valves are engineered for durability and optimal engine function.

Image 1: Supertech Black Nitrided Intake Valve set (MAIVN-2301F-8).
Note: Professional installation by a certified mechanic is strongly recommended due to the precision required for engine component installation. Incorrect installation can lead to severe engine damage.

Image 2: Close-up view of a Supertech Black Nitrided Intake Valve, highlighting the stem and head.
Once installed, the Supertech intake valves operate as an integral part of your engine's valvetrain. Proper engine break-in procedures, as recommended by your engine builder or vehicle manufacturer, are crucial after any significant engine work, including valve replacement. This ensures the new components seat correctly and perform optimally.
The Supertech Black Nitrided Intake Valves are designed for durability and require minimal direct maintenance. However, their longevity and performance are directly linked to the overall health and maintenance of your engine.
If you experience issues after installing new intake valves, consider the following common problems and potential solutions. Always consult a qualified mechanic for diagnosis and repair.
| Symptom | Possible Cause | Recommended Action |
|---|---|---|
| Engine Misfire / Rough Idle | Improper valve seating, bent valve, incorrect valve lash, faulty valve stem seal. | Perform compression/leak-down test. Re-check valve lash. Inspect valves and seats for damage or improper sealing. |
| Excessive Oil Consumption / Blue Smoke | Worn or improperly installed valve stem seals, excessive valve guide wear. | Inspect valve stem seals and valve guides. Replace if necessary. |
| Ticking or Tapping Noise from Engine | Incorrect valve lash, worn hydraulic lifters/tappets, insufficient oil pressure. | Check and adjust valve lash. Verify oil pressure. Inspect lifters/tappets. |
| Loss of Engine Power | Poor valve sealing, incorrect valve timing, bent valve. | Perform compression/leak-down test. Verify engine timing. Inspect valvetrain components. |
| Feature | Detail |
|---|---|
| Part Number | MAIVN-2301F-8 |
| Valve Type | Intake |
| Material | Steel (Black Nitrided) |
| Head Diameter | 35mm (Standard) Flat |
| Stem Diameter | 5.48mm |
| Length | 103.40mm |
| Application | Mazda/Ford Duratec 2.0L/2.3L Engines |
| Quantity | Set of 8 valves |
| Item Weight | 1.1 pounds (total package) |
| Product Dimensions | 1.1 x 6 x 5.5 inches (package) |
The product's warranty is listed as "Other." For specific warranty terms and conditions, please contact the seller or manufacturer directly. Retain your proof of purchase for any warranty claims.
For technical assistance, installation questions, or support regarding your Supertech intake valves, please contact KarParts360 customer service or the Supertech manufacturer directly. Provide your product model number (MAIVN-2301F-8) and purchase details when seeking support.

KarParts360 is the brand for this product.
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