OTC 6683 Cam Tool Set Instruction Manual

1. Product Overview

The OTC 6683 Cam Tool Set is a specialized automotive tool designed for accurately setting and maintaining engine timing on specific Ford vehicles. This set is essential for performing services such as timing belt or chain replacement, camshaft seal replacement, or any procedure requiring precise camshaft and crankshaft alignment. It ensures that the engine's valves open and close at the correct intervals relative to the piston position, which is critical for optimal engine performance and preventing internal damage.

2. Safety Information

Adhering to safety precautions is paramount when working with automotive tools and components. Failure to do so can result in serious injury or damage to the vehicle.

• Always wear appropriate Personal Protective Equipment (PPE), including safety glasses and gloves, to protect against debris, fluids, and sharp edges.
• Ensure the vehicle is stable and secure. Use jack stands on a level, firm surface to support the vehicle after lifting. Never rely solely on a jack.
• Disconnect the vehicle's battery before beginning any work to prevent accidental starting or electrical shorts.
• Refer to the vehicle manufacturer's service manual for specific procedures, torque specifications, and additional safety warnings relevant to your vehicle model.
• Do not use damaged or modified tools. Inspect all components of the OTC 6683 set for wear or damage before each use.
• Keep hands and clothing clear of moving engine parts, especially when rotating the crankshaft or camshafts.

3. Components

The OTC 6683 Cam Tool Set includes the following components:

• Camshaft Alignment Plate (Part 567621): A flat, elongated metal bar with precision-cut slots designed to fit into the rear of the camshafts, ensuring they are locked in their correct timed position.
• Camshaft Sprocket Holding Tool (Part 567620): A curved metal tool with two prongs, used to hold the camshaft sprockets stationary while loosening or tightening their retaining bolts.
• Crankshaft Pin: A small, threaded pin used to lock the crankshaft in its Top Dead Center (TDC) position, preventing rotation during timing procedures.

Figure 1: OTC 6683 Cam Tool Set components. This image displays the complete OTC 6683 Cam Tool Set, featuring the camshaft alignment plate (long bar), the camshaft sprocket holding tool (curved piece), and the crankshaft pin (small threaded component). These tools are essential for accurately setting engine timing.

4. Setup

Proper setup is crucial for accurate timing and safe operation.

1. Prepare the Vehicle: Ensure the engine is cool. Disconnect the negative terminal of the vehicle's battery.
2. Access Timing Components: Following your vehicle's specific service manual, remove any necessary engine covers, accessory belts, pulleys, or other components to gain full access to the timing belt/chain and associated gears.
3. Identify Timing Marks: Locate the crankshaft and camshaft timing marks as indicated in the vehicle's service manual. These marks are critical for initial positioning.

5. Operating Instructions

These instructions provide a general guide. Always refer to the specific vehicle service manual for detailed, model-specific procedures.

1. Crankshaft Positioning: Rotate the crankshaft manually (using a suitable wrench on the crankshaft pulley bolt) until the engine is at Top Dead Center (TDC) for cylinder 1, or the specific timing position required by the vehicle service manual. Once aligned, insert the Crankshaft Pin into the designated hole on the engine block or crankshaft to lock the crankshaft in position. Ensure the pin is fully seated and secure.
2. Camshaft Alignment: With the crankshaft locked, position the Camshaft Alignment Plate (567621) onto the rear of the camshafts. The plate should fit snugly into the slots on both camshafts, ensuring they are correctly aligned. If the plate does not fit easily, gently rotate the camshafts slightly until the plate slides into place. Do not force the plate, as this indicates misalignment.
3. Camshaft Sprocket Holding: When loosening or tightening the camshaft sprocket retaining bolts, use the Camshaft Sprocket Holding Tool (567620) to prevent the camshaft sprockets from rotating. This tool provides leverage and stability, preventing damage to the camshafts or timing components.
4. Perform Service: With the crankshaft and camshafts securely locked in their timed positions, proceed with the timing belt or chain replacement, tensioner adjustment, or any other required engine service as detailed in the vehicle's specific service manual.
5. Reassembly and Verification: After completing the service, remove the Camshaft Alignment Plate and Crankshaft Pin. Reassemble all engine components in reverse order of removal, ensuring all fasteners are torqued to manufacturer specifications. Before starting the engine, manually rotate the engine (at least two full revolutions) to confirm proper timing and ensure no interference. Recheck timing marks if necessary.

Figure 2: Application of Special Service Tools. This image illustrates the application of specialized automotive tools, similar to the OTC 6683, in a professional workshop setting. It highlights the precision and specific design required for modern vehicle maintenance and repair tasks.

6. Maintenance

Proper maintenance of your OTC 6683 Cam Tool Set will ensure its longevity and continued accuracy.

• Cleaning: Clean the tools thoroughly after each use to remove oil, grease, dirt, and any other contaminants. Use a clean cloth and a mild degreaser if necessary.
• Storage: Store the tools in their original case or a designated dry, clean environment. This prevents rust, corrosion, and physical damage.
• Inspection: Before each use, visually inspect all components for any signs of wear, cracks, bends, or other damage. Pay close attention to the precision-machined surfaces. Replace any damaged components immediately.

7. Troubleshooting

If you encounter issues while using the OTC 6683 Cam Tool Set, consider the following common troubleshooting steps:

• Tool does not fit the engine:
• Verify that the OTC 6683 is the correct tool set for your specific vehicle's make, model, and engine year (Ford 1.6L 4V L4 engines, 2011-2012 Fiesta).
• Ensure the engine is at the precise timing position (e.g., TDC for cylinder 1) as specified in the vehicle's service manual. Slight rotation may be needed.
• Difficulty aligning camshafts with the plate:
• Confirm that the camshafts are free to rotate. Small, gentle adjustments to the camshaft position may be required to allow the alignment plate to seat correctly. Never apply excessive force.
• Crankshaft pin does not seat fully:
• Double-check that the crankshaft is at the exact timing mark. The pin should slide into its locking hole easily when correctly aligned.

8. Specifications

9. Warranty & Support

For detailed product support, additional information, or to download the complete user guide in PDF format, please visit the official OTC website or refer to the link below:

Download User Guide (PDF)

For warranty inquiries or technical assistance, please contact OTC customer service directly. Contact information can typically be found on the official OTC website or product packaging.