The Kenworth T660 is a popular semi-truck model known for its efficiency and comfort. One crucial aspect of maintaining a comfortable and healthy environment inside the cab is regularly replacing the cabin air filter. This filter plays a vital role in removing dust, pollen, and other airborne particles from the air entering the cab. However, many T660 owners and operators find it challenging to locate and replace this filter due to its somewhat hidden position. In this comprehensive guide, we'll explore the exact location of the Kenworth T660 cabin air filter and provide step-by-step instructions for its replacement.

Filter TypeReplacement Interval
Cabin Air FilterEvery 15,000-30,000 miles or annually

Locating the Cabin Air Filter

The cabin air filter in a Kenworth T660 is not immediately visible when you open the hood or look inside the cab. Its location can vary slightly depending on the specific year model and configuration of your T660. However, in most cases, the filter is located behind the glove box on the passenger side of the cab.

To access the cabin air filter, you'll need to remove several components, including the kick panel, glove box, and potentially the blower motor housing. This process might seem daunting at first, but with the right tools and patience, it's a task that can be completed in about 30-45 minutes.

Tools Required

Before you begin the process of locating and replacing the cabin air filter, gather the following tools:

  • Flathead screwdriver
  • Phillips head screwdriver
  • 13mm socket wrench
  • T20 Torx bit
  • Flashlight
  • Clean cloth or small vacuum (for cleaning the filter housing)

It's important to note that having small hands can be advantageous when reaching into tight spaces to remove and replace the filter. If you have larger hands, you might need to enlist the help of someone with smaller hands or be prepared to spend a bit more time maneuvering in the confined space.

Step-by-Step Filter Replacement Process

Now that we've identified the general location of the cabin air filter and gathered the necessary tools, let's walk through the step-by-step process of replacing the filter in your Kenworth T660.

1. Prepare the work area: Park your T660 on a level surface and engage the parking brake. Turn off the engine and remove the key from the ignition to ensure safety.

2. Remove the kick panel: Start by removing the kick panel on the passenger side. Use a flathead screwdriver to gently pry it loose, being careful not to scratch the plastic. The kick panel is held in place by clips, so work your way around, releasing each clip until the panel comes free.

3. Remove the glove box: To access the screws holding the glove box in place, you'll need to remove a small cover plate near the grab bar. Use your flathead screwdriver to carefully pop this cover off. Then, use a 13mm socket wrench to remove the bolts securing the grab bar. Once the grab bar is out of the way, you can remove the screws holding the glove box in place and take it out.

4. Locate the blower motor housing: With the glove box removed, you should now be able to see the blower motor housing. The cabin air filter is located behind this housing.

5. Remove the blower motor (if necessary): In some cases, you may need to remove the blower motor to access the filter. If so, disconnect the electrical connector and remove the mounting screws (usually T20 Torx screws) holding the blower motor in place.

6. Access the filter: Look for a plastic housing or cover that conceals the filter. It's typically located at the top left corner of the space behind the blower motor.

7. Remove the old filter: Carefully pull out the old filter. It may be slightly curved to fit the shape of the housing. Take note of its orientation as you remove it.

8. Clean the filter housing: Use a clean cloth or small vacuum to remove any debris or dust from the filter housing before inserting the new filter.

9. Install the new filter: Insert the new cabin air filter, making sure it's oriented correctly. It should curve in the same way as the old filter and fit snugly into the tracks at the top and bottom of the housing.

10. Reassemble components: Once the new filter is in place, reassemble all the components in reverse order. Make sure to reconnect any electrical connectors you may have disconnected.

11. Test the system: Turn on your T660's HVAC system and verify that air is flowing properly through the vents.

Maintenance Tips and Best Practices

To ensure optimal performance of your Kenworth T660's cabin air filter and HVAC system, consider the following maintenance tips:

  • Regular inspections: Check your cabin air filter every 3-4 months, especially if you frequently drive in dusty or polluted areas.
  • Vacuum the cab regularly: Keeping the interior of your cab clean can help reduce the load on your cabin air filter.
  • Use high-quality filters: Invest in OEM or high-quality aftermarket filters designed specifically for the Kenworth T660.
  • Keep a spare filter: Having a spare filter on hand can save you time and ensure you're never caught with a clogged filter on the road.
  • Consider your environment: If you frequently drive in areas with high pollen counts or air pollution, you may need to replace your filter more often than the recommended interval.

Common Issues and Troubleshooting

Even with regular maintenance, you may encounter some issues with your T660's cabin air filter system. Here are some common problems and their potential solutions:

1. Reduced airflow: If you notice a significant decrease in airflow from your vents, it's likely time to replace the cabin air filter. A clogged filter can restrict airflow and reduce the efficiency of your HVAC system.

2. Unusual odors: If you smell musty or unpleasant odors coming from your vents, your cabin air filter may be harboring mold or bacteria. Replace the filter immediately and consider having your HVAC system cleaned.

3. Excessive noise: If you hear unusual noises when your HVAC system is running, it could indicate a problem with the blower motor or a severely clogged filter. Check and replace the filter first, and if the noise persists, have a professional inspect your blower motor.

4. Difficulty accessing the filter: If you're having trouble reaching or removing the filter, don't force it. Consult your T660's manual or seek professional help to avoid damaging the filter housing or surrounding components.

5. Filter doesn't fit properly: Always use filters specifically designed for the Kenworth T660. Using the wrong size or type of filter can lead to poor performance and potential damage to your HVAC system.

By following these guidelines and maintaining a regular replacement schedule, you can ensure that your Kenworth T660's cabin air filter continues to provide clean, fresh air for your comfort and health on the road.

FAQs About Kenworth T660 Cabin Air Filter Location

    • How often should I replace my Kenworth T660 cabin air filter?
      Replace the filter every 15,000-30,000 miles or annually, whichever comes first.
    • Can I clean and reuse my T660's cabin air filter?
      It's not recommended. Always replace with a new filter for optimal performance.
    • Will a clogged cabin air filter affect my T660's fuel efficiency?
      Yes, a clogged filter can make the HVAC system work harder, potentially impacting fuel efficiency.
    • Is it necessary to remove the blower motor to replace the filter?
      In most T660 models, yes. The blower motor usually needs to be removed for filter access.
    • Can I replace the T660 cabin air filter myself or do I need a professional?
      With proper tools and patience, most owners can replace the filter themselves.