Twin Cam Inner Tensioner Removal Tool

Working on a Harley-Davidson Twin Cam engine often requires specialized tools, and the inner cam chain tensioner is no exception. This article focuses on safely and effectively removing the inner cam chain tensioner using a dedicated removal tool. This knowledge can save you time, money, and potential engine damage.

Preparing for Tensioner Removal

Before you begin, gather your necessary tools and materials. This includes the inner cam chain tensioner removal tool, sockets, wrenches, a torque wrench, new inner cam bearings (recommended), new cam cover gasket, assembly lube, and clean rags. It's crucial to have a clean workspace. Ensure the motorcycle is stable and properly supported. Disconnect the battery to prevent electrical issues.

Step-by-Step Removal

Step 1: Remove Cam Cover.

Begin by removing the cam cover. Depending on your model, this will involve removing bolts and possibly other components like the exhaust system (partially, if necessary). Refer to your service manual for the specific bolt pattern and any hidden fasteners. Carefully pry the cam cover off, being mindful not to damage the mating surfaces. A rubber mallet can be used gently to loosen it.

Step 2: Accessing the Inner Tensioner.

With the cam cover removed, you'll now have access to the inner cam chain tensioner. Observe the orientation of the tensioner and its components. This will help you during reassembly. Note the location of the tensioner shoe and how it interacts with the cam chain.

Step 3: Installing the Removal Tool.

The inner cam chain tensioner removal tool typically consists of a body and a threaded rod. Position the tool so the body sits securely around the tensioner. The threaded rod will press against the tensioner shoe to relieve pressure on the cam chain. Tighten the threaded rod of the tool slowly and evenly. You'll notice the tensioner shoe retracting. Do not overtighten; you only need to relieve the tension enough to remove the tensioner.

Tip: Applying a small amount of penetrating oil around the tensioner before using the tool can help loosen any corrosion and make removal easier.

Step 4: Removing the Tensioner Assembly.

Once the tension is relieved, you can remove the tensioner assembly. Usually, this involves removing one or two bolts that secure the tensioner to the engine case. Carefully remove the bolts and gently pull the tensioner assembly out. Be prepared for some oil to drip out. Have a rag handy to catch any spills.

Step 5: Inspecting Components.

After removing the tensioner, carefully inspect all components for wear and tear. This includes the tensioner shoe, the tensioner body, and the cam chain itself. Look for excessive wear on the shoe, cracks in the body, and excessive slack or damage to the chain. Replace any worn or damaged parts.

Replacing Inner Cam Bearings (Recommended)

Now is an ideal time to replace the inner cam bearings. These bearings are relatively inexpensive and are a common source of problems in Twin Cam engines. Replacing them while you have everything apart can save you headaches down the road.

Bearing Removal and Installation

Step 1: Removing Old Bearings.

Use a bearing puller or a slide hammer with a bearing attachment to remove the old bearings. Be sure to use the correct size attachment to avoid damaging the bearing bore. Heat can also be used to gently expand the case around the bearing. Work slowly and carefully to avoid damaging the case.

Step 2: Installing New Bearings.

Before installing the new bearings, lightly lubricate the bearing bore and the outside of the new bearings with assembly lube. Use a bearing driver to press the new bearings into place. Ensure the bearings are seated fully and squarely in the bore. Avoid using excessive force, which can damage the bearings or the case.

Reassembly

Step 1: Installing the New Tensioner (or Reusing the Old One).

If you're reusing the old tensioner (not recommended if it shows significant wear), clean it thoroughly and inspect it for any damage. Install the tensioner assembly, ensuring it's properly aligned. Torque the retaining bolts to the specification in your service manual. Using new bolts is always a good practice.

Step 2: Releasing the Tensioner Tool.

Slowly release the tension on the removal tool's threaded rod. This will allow the tensioner shoe to engage the cam chain. Ensure the tensioner shoe is properly positioned and moving freely.

Step 3: Installing the Cam Cover.

Install a new cam cover gasket. Ensure the mating surfaces of the cam cover and the engine case are clean and free of debris. Carefully position the cam cover and tighten the bolts to the specified torque in your service manual. Follow the correct bolt pattern to ensure even pressure and prevent leaks.

Step 4: Final Checks.

Double-check all connections and ensure all components are properly installed. Reconnect the battery. Start the engine and listen for any unusual noises. Check for oil leaks around the cam cover. If everything sounds and looks good, you're done.

Practical Application and Benefits

Knowing how to remove and replace the inner cam chain tensioner offers several benefits in your daily life or work as a motorcycle mechanic. For motorcycle owners, this knowledge empowers you to perform this crucial maintenance task yourself, saving on labor costs. Regular inspection and replacement of the tensioner can prevent catastrophic engine failure. For mechanics, this knowledge is essential for providing comprehensive service to Harley-Davidson motorcycles. The ability to efficiently and safely remove and replace the tensioner improves efficiency and reduces the risk of errors.

Understanding the Risks

Working on engines carries inherent risks. Incorrect procedures can lead to engine damage, personal injury, or even death. If you are not comfortable working on engines, seek professional assistance. Always consult your service manual for specific instructions and torque specifications. Wear appropriate safety gear, including eye protection and gloves. Be mindful of hot engine components. Dispose of used oil and other fluids properly.

Alternative Tools and Methods

While a dedicated inner cam chain tensioner removal tool is highly recommended, some individuals may attempt to remove the tensioner without it. This is generally not advisable, as it can damage the tensioner or other engine components. However, alternative methods may involve using pry bars or screwdrivers to carefully relieve tension on the chain. Use extreme caution if attempting these methods, as they are more prone to causing damage. The dedicated tool is designed to apply controlled pressure and minimize the risk of damage.

Troubleshooting Common Issues

Sometimes, the tensioner may be difficult to remove, even with the proper tool. This can be due to corrosion, excessive wear, or damage to the tensioner assembly. If you encounter resistance, do not force the tool. Apply penetrating oil and try again. If the tensioner still won't budge, carefully inspect the surrounding area for any obstructions. In extreme cases, you may need to use heat to loosen the tensioner.

Checklist/Guideline for Twin Cam Inner Tensioner Removal

• Gather all necessary tools and materials: Tensioner removal tool, sockets, wrenches, torque wrench, new inner cam bearings (recommended), new cam cover gasket, assembly lube, clean rags.
• Ensure a clean and stable workspace.
• Disconnect the battery.
• Remove the cam cover following the service manual's instructions.
• Install the removal tool and slowly relieve tension on the cam chain.
• Remove the tensioner assembly.
• Inspect all components for wear and tear; replace as needed.
• Replace inner cam bearings (recommended).
• Install the new (or cleaned and inspected) tensioner assembly.
• Release the tensioner tool.
• Install a new cam cover gasket.
• Reinstall the cam cover and torque bolts to specifications.
• Reconnect the battery.
• Start the engine and check for leaks and unusual noises.