Removing The Vvti Camera Gear: Step-By-Step Guide

Removing the VVTI cam gear can be a challenging task. It is important to note that the process may vary slightly depending on the specific vehicle model and year. However, some common tools that can be used include a wrench, breaker bar, impact wrench, and an electric impact. It is also crucial to hold the cam shaft securely and be cautious when handling the timing belt to avoid any potential damage to the valves. Additionally, it is recommended to refer to the vehicle's repair manual or seek guidance from online forums and videos specifically for the make and model of the car.

Using a wrench to hold the cam shaft

To remove the VVTI cam gear, you will need to hold the cam shaft with a wrench. This process can be challenging, so it may be helpful to have an assistant to hold the wrench in place while you work.

First, locate the hex on the cam shaft. This will be towards the middle of the shaft. Once you have found the hex, use an adjustable wrench to grip it firmly. Make sure that the wrench is secure and has little to no wiggle room. With the cam shaft held in place, you can now attempt to remove the Allen bolt in front of the cam gear. This bolt can be tough to remove, so you may need to use a breaker bar or a cheater bar with the wrench to apply gradual force.

If you are having trouble removing the bolt, you can try using a different tool, such as an impact wrench or an electric impact. You can also try using a different size Allen key, such as a 10mm or 14mm. It is important not to strip the Allen bolt, as this will make it more difficult to remove.

Once the bolt is removed, you can carefully lift the cam gear off the shaft. Be aware that the cam gear may have some play, so you will need to be careful not to move the cam shaft when removing the gear. It is also important to note that the cam gear should only go onto the shaft in one spot, as there is a notch that keeps it in line.

Using a breaker bar to remove the gear

Removing the VVTI cam gear can be a challenging task, but it is doable with the right tools and techniques. Here is a detailed guide on using a breaker bar to remove the gear:

Before beginning the process, ensure that you have the necessary tools, including a breaker bar, a wrench, and possibly an impact wrench or electric impact. It is also recommended to have an assistant to help hold the cam shaft with a wrench while you work on removing the gear.

First, make sure the engine is off and the vehicle is securely parked. Locate the VVTI cam gear and identify the bolt that needs to be removed. Place the breaker bar on the bolt and apply gradual force to loosen it. You may need to use a cheater bar with a crescent wrench to gain more leverage and prevent slipping. It is important to keep your tools square and apply force smoothly to avoid damage.

If the bolt is particularly tight, you may need to use an impact wrench or electric impact. Ensure you have a firm grip on the cam shaft with a wrench to prevent it from moving while applying force. Be cautious when using an impact wrench as the wrench can slip, potentially causing damage to the valves.

Once the bolt is loosened, you can proceed to remove the VVTI cam gear. Be cautious as there may be some oil drip, so it is recommended to place a rag underneath to catch any spills. After removing the gear, you may want to consider replacing the valve cover gaskets, cam seals, and resealing the front cam caps to prevent leaks.

Reinstalling the gear involves bolting it back on and then rotating it clockwise as far as it can go. This position is crucial for proper timing belt installation, so make sure to follow the instructions carefully.

It is important to note that some sources advise against removing certain bolts on the VVTI cam gear, as it may affect the gear's performance. Consult a repair manual or seek advice from a certified mechanic if you are unsure about any steps in the process.

Using an impact wrench

To remove the VVTI cam gear using an impact wrench, you will need to first remove the valve cover to access the camshaft. You can then use a crescent wrench to grip the hex on the camshaft and hold it firmly in place. This will prevent the shaft from moving while you attempt to remove the Allen bolt in front of the cam gear.

It is important to note that the VVTI cam gear has 30 degrees of movement left and right. When reinstalling the gear, the manual states that you should bolt the gear on, tighten it, and then rotate it clockwise as far as it can go. This position should be held for timing belt installation. Make sure you have marked the gears before beginning this process.

Additionally, when working with the camshaft, it is recommended to turn the crank 30 degrees off the top dead centre to prevent bending any valves. You can refer to the shop manual for specific instructions and markings.

Reinstalling the timing belt

Now that you've removed the old timing belt, it's time to install the new one. Here's a step-by-step guide to help you through the process:

• Purchase a quality replacement belt from a reputable brand to ensure durability. Compare the new belt with the old one to make sure they have the same width, length, and tooth configuration.
• Position the new belt around the crankshaft sprocket. Refer to your vehicle's repair manual for specific instructions on installing the crankshaft pulley.
• Ensure that the marks on the crankshaft sprocket or pulley are correctly aligned with the marks on the engine block. If they're not, carefully rock the pulley until they line up.
• Double-check that the marks on the camshaft sprocket are aligned with the marks on the cylinder head.
• Thread the timing belt around the camshaft sprocket as per the instructions in your repair manual.
• Apply pressure to the belt by moving the tensioner into the belt to hold it in place. Again, follow the manual's instructions to set the correct belt tension.
• Perform a quick test to ensure the belt has the right tension: use your thumb and index finger to turn the belt about a quarter of a turn. If you need to apply reasonable pressure to turn it, the tension is correct.
• After setting the tension, reinstall any sensors or brackets that you had removed earlier.
• Reinstall the timing belt cover.
• Reconnect the negative battery cable to the battery.
• Start the engine to ensure it operates correctly.

It's important to note that the process of reinstalling the timing belt may vary slightly depending on your vehicle's specific make and model. Always refer to your vehicle's repair manual for detailed instructions specific to your car. Additionally, take your time during this process and double-check your work to avoid any potential issues.

Using a torque wrench

Before beginning, ensure you have the correct size torque wrench for the job. In some cases, an Allen key or socket may be required to attach to the wrench. It is also important to note that you should not overtighten the bolts, as this can cause damage. Refer to your vehicle's service manual for the specified torque settings.

When using the torque wrench, be sure to hold it at a 90-degree angle to the fastener you are tightening. This will ensure an accurate reading and prevent damage to the wrench or the fastener. Place the wrench on the fastener and apply force until you feel resistance. At this point, the wrench will begin to click, indicating that you have reached the desired torque setting. Do not continue applying force after the clicking begins, as this can lead to over-tightening.

If you are having difficulty reaching the specified torque setting, there are a few things you can try. First, ensure that the fastener is clean and free of debris, as this can affect the torque reading. You can also try using a breaker bar or an impact wrench for additional leverage. If you are still unable to reach the desired torque, it may be necessary to replace the fastener or seek assistance from a professional.

It is important to torque the bolts in a star pattern, rather than sequentially. This helps to ensure even pressure and prevents warping or damage to the gear or engine components. Begin by tightening the bolts to a lower torque setting, such as 20 ft-lbs, before increasing to the final specified torque setting. This helps to ensure that the bolts are properly seated and reduces the risk of overtightening.

Finally, it is crucial to follow the correct tightening sequence for the VVTI cam gear. Refer to your vehicle's service manual or a trusted online resource for the specific sequence. Failing to tighten the bolts in the correct order can lead to improper alignment, damage to engine components, or even engine failure. Take your time and double-check your work to ensure a safe and successful removal of the VVTI cam gear.

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