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Valve Spring Compressor: Function & How to Use

09 April 2025
Valve Spring Compressor: Fungsi & Cara Menggunakan

Talking about automotive will never run out of topics that are discussed in depth, including the function of the valve spring compressor which is quite special in the automotive world.

So what makes it so special? You must be curious? Just take a look at the discussion below.

Read also: How the Valve Body Gearbox Works in Automatic Cars

Function of the Valve Spring Compressor

Before you know the function of the valve spring compressor, you must first know the facts.

If you hear the name valve spring compressor, your mind might immediately assume that the object is a car device. 

If you think like that, then you are wrong. The definition of a valve spring compressor is a special service tool that can only be used once.

The valve spring compressor functions as a spring press when you want to install or remove the cotter valve (tiger claw).

The cotter valve functions as a valve lock, and is known as a car component that is difficult to remove, so you need a special tool to facilitate the removal process.

In addition, it can also minimize damage to components around the cotter spring. The valve spring compressor comes in various shapes so that the use of this tool corresponds to the model of the chosen tool, but the function remains the same, which is to press the spring on the valve.

How to Use the Valve Spring Compressor

After knowing what a valve spring compressor is and its uses, here is how to work and use the valve spring compressor correctly.

1. Set the Position of the Stem Correctly

Basically, the valve spring compressor has a shape like an imperfect square because the top part is not connected or is broken.

The first step you must take is to set the position of the stem correctly by paying attention to the moving and stationary parts of the stem.

Use the stationary part of the stem to hold the valve position so that its position does not shift when the spring is pressed.

Read Also: Function of Dwell Tester: Maintenance & How to Use It

2. Adjust the Moving Stem Part

Next, you can adjust the moving stem part using a thread, set the stem according to your needs.

Adjusting the stem is very easy, make sure the position of the stem is correct, then move the end of the stem back and forth until the valve compressor does not shift when used. 

3. Press the Valve Compressor Part

The next step, you press the valve compressor part so that the spring is compressed, making it easy to remove or install the cotter pin perfectly.

However, if it is not suitable, you can readjust by turning the stem part. Do this slowly and do not rush so that the cotter pin can be installed and removed easily. 

4. Remove and Install the Cotter Pin

After you have followed the previous steps, now it is time for you to perform the process of removing and installing the cotter pin as needed.

Set the position and ensure it is perfectly installed on the locking valve, make sure the valve is locked to avoid the risk of valve leakage.

Read Also: The Important Role of Car Piston Rings and Effective Maintenance Tips

How to Maintain the Valve Spring Compressor

After knowing how to use it, you also need to know how to maintain this tool so that it lasts. Here are the steps.

  1. Use the tool as intended, which is to facilitate pressing the spring during the removal or installation of the cotter valve.
  2. If it is no longer in use, clean it immediately and store it in a dust-free place.
  3. Always lubricate the shaft part to make it easy to turn and prevent corrosion.

Hopefully, the review of the function of the valve spring compressor above along with how to work and use it can be beneficial. Make sure to perform regular car maintenance with Daihatsu dealers or consult with experts. 

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