How To Measure Crankshaft Runout?

Have you ever wondered how to measure crankshaft runout? If so, you’re not alone. Crankshaft runout is a common problem that can cause a number of issues with your engine, including decreased performance, increased wear and tear, and even engine failure. But don’t worry, measuring crankshaft runout is a relatively simple process that can be completed in just a few minutes.

In this article, we’ll walk you through the steps of how to measure crankshaft runout, so you can keep your engine running smoothly and efficiently. We’ll also provide some tips on how to troubleshoot and correct any problems that you may find. So, if you’re ready to learn more, let’s get started!

Step	Tools	Instructions
1. Remove the crankshaft pulley.	– Wrench	– Socket
2. Clean the crankshaft journal.	– Solvent	– Rag
3. Install the crankshaft runout gauge.	– Crankshaft runout gauge	– Feeler gauge
4. Rotate the crankshaft and measure the runout.	– Dial indicator	– Feeler gauge
5. Compare the measurement to the manufacturer’s specifications.	– Manufacturer’s specifications	– None

Crankshaft runout is a measure of the amount of wobble in the crankshaft. It is caused by wear and tear on the bearings, and can lead to premature engine failure. Measuring crankshaft runout is a simple procedure that can be done with a few basic tools.

Tools and Materials Needed

• Dial indicator
• Magnetic base
• Straightedge
• Feeler gauge
• Penetrating oil

Steps to Measure Crankshaft Runout

1. Locate the crankshaft main bearings. The crankshaft main bearings are located in the center of the engine block. They are held in place by the crankshaft caps.
2. Remove the crankshaft caps. Use a socket wrench to remove the crankshaft caps. Be careful not to damage the bearings.
3. Install the magnetic base. The magnetic base will hold the dial indicator in place. It is attached to the engine block with bolts.
4. Install the dial indicator. The dial indicator is used to measure the crankshaft runout. It is attached to the magnetic base with a rod.
5. Zero the dial indicator. Make sure the dial indicator is zeroed before taking any measurements.
6. Place the straightedge on the crankshaft. The straightedge will be used to measure the crankshaft runout. It is placed on the crankshaft journals.
7. Take the measurement. Use the dial indicator to take a measurement of the crankshaft runout. The measurement is taken at two points: the front and rear of the crankshaft.
8. Repeat steps 6 and 7 for each crankshaft journal. Make sure to take measurements at both the front and rear of each crankshaft journal.
9. Calculate the average runout. Add the two measurements together and divide by two. This will give you the average crankshaft runout.

Crankshaft runout is a critical measurement that can help you identify potential problems with your engine. If the crankshaft runout is excessive, it can lead to premature engine failure. By following the steps in this guide, you can easily measure crankshaft runout and keep your engine running smoothly.

How To Measure Crankshaft Runout?

Crankshaft runout is a measurement of the amount of wobble in the crankshaft. It is important to measure crankshaft runout because excessive runout can cause premature wear on the bearings and other components of the engine.

There are two types of crankshaft runout: radial runout and taper runout. Radial runout is the measurement of the amount of wobble in the crankshaft from side to side. Taper runout is the measurement of the amount of taper in the crankshaft from one end to the other.

To measure crankshaft runout, you will need the following tools:

• A dial indicator
• A stand to mount the crankshaft
• A set of feeler gauges
• A torque wrench
• A set of rod caps

1. Remove the oil pan from the engine.
2. Rotate the crankshaft until the main bearing caps are accessible.
3. Remove the main bearing caps and bearings.
4. Clean the crankshaft journal surfaces with penetrating oil.
5. Mount the crankshaft in a stand so that it can be rotated freely.
6. Install the dial indicator on the crankshaft journal.
7. Zero the dial indicator.
8. Rotate the crankshaft slowly and observe the reading on the dial indicator.
9. The maximum reading on the dial indicator is the crankshaft runout.

Radial runout should be no more than 0.002 inches (0.05 mm). Taper runout should be no more than 0.001 inches (0.025 mm).

If the crankshaft runout is excessive, the crankshaft will need to be resurfaced or replaced.

How to Remove the Crankshaft from the Engine

Removing the crankshaft from the engine can be a difficult and time-consuming task. However, it is a necessary step in many engine repairs and rebuilds.

To remove the crankshaft from the engine, you will need the following tools:

• A torque wrench
• A socket set
• A breaker bar
• A pry bar
• A hammer
• A set of rod caps
• A set of main bearing caps
• A crankshaft puller

1. Remove the oil pan from the engine.
2. Rotate the crankshaft until the main bearing caps are accessible.
3. Remove the main bearing caps and bearings.
4. Clean the crankshaft journal surfaces with penetrating oil.
5. Install the rod caps and torque them to the specified torque.
6. Install the crankshaft puller and attach it to the crankshaft.
7. Use a pry bar to pry the crankshaft out of the engine block.
8. Remove the rod caps and bearings.
9. Clean the crankshaft journal surfaces with penetrating oil.
10. Inspect the crankshaft for damage.

If the crankshaft is damaged, it will need to be replaced.

How to Clean the Crankshaft Journal Surfaces with Penetrating Oil

Cleaning the crankshaft journal surfaces with penetrating oil is an important step in the process of removing the crankshaft from the engine. Penetrating oil will help to loosen the bearings and make them easier to remove.

To clean the crankshaft journal surfaces with penetrating oil, you will need the following materials:

• Penetrating oil
• A rag

1. Apply penetrating oil to the crankshaft journal surfaces.
2. Allow the penetrating oil to soak in for several minutes.
3. Use a rag to wipe off the excess penetrating oil.

The crankshaft journal surfaces should now be clean and free of debris.

Measuring crankshaft runout, removing the crankshaft from the engine, and cleaning the crankshaft journal surfaces with penetrating oil are all important steps in the process of engine repair and rebuild. By following these steps, you can ensure that your engine is running smoothly and efficiently.

How do I measure crankshaft runout?

Crankshaft runout is a measure of the amount of wobble in the crankshaft. It is typically measured in thousandths of an inch (0.001″). To measure crankshaft runout, you will need a dial indicator, a torque wrench, and a set of feeler gauges.

1. Install the dial indicator on the front of the crankshaft. The dial indicator should be installed so that the plunger is touching the crankshaft journal.
2. Tighten the crankshaft nut to the specified torque.
3. Rotate the crankshaft 180 degrees.
4. Read the dial indicator. The difference between the high and low readings is the crankshaft runout.

What is the acceptable amount of crankshaft runout?

The acceptable amount of crankshaft runout will vary depending on the engine. However, most engines will have a maximum crankshaft runout of 0.002″.

What causes crankshaft runout?

Crankshaft runout can be caused by a number of factors, including:

• Improper installation of the crankshaft bearings. If the crankshaft bearings are not installed correctly, they can cause the crankshaft to wobble.
• Damage to the crankshaft bearings. If the crankshaft bearings are damaged, they can cause the crankshaft to wobble.
• Worn or damaged crankshaft journals. If the crankshaft journals are worn or damaged, they can cause the crankshaft to wobble.

How can I prevent crankshaft runout?

You can prevent crankshaft runout by:

• Installing the crankshaft bearings correctly. Make sure that the crankshaft bearings are installed in the correct position and that they are properly lubricated.
• Maintaining the crankshaft bearings. Make sure that the crankshaft bearings are regularly lubricated and that they are not damaged.
• Replacing worn or damaged crankshaft journals. If the crankshaft journals are worn or damaged, they should be replaced.

What are the symptoms of crankshaft runout?

The symptoms of crankshaft runout can include:

• Engine knocking or rattling.
• Engine vibration.
• Poor fuel economy.
• Loss of power.

If you experience any of these symptoms, it is important to have your engine checked by a qualified mechanic.

How is crankshaft runout corrected?

Crankshaft runout can be corrected by:

• Replacing the crankshaft bearings. If the crankshaft bearings are worn or damaged, they should be replaced.
• Resurfacing the crankshaft journals. If the crankshaft journals are worn or damaged, they should be resurfaced.
• Installing a crankshaft alignment tool. A crankshaft alignment tool can help to correct crankshaft runout by aligning the crankshaft with the engine block.

It is important to note that crankshaft runout is a serious problem that can lead to engine damage. If you suspect that your engine has crankshaft runout, it is important to have it checked by a qualified mechanic as soon as possible.

crankshaft runout is an important measurement to take when servicing an engine. It can help you identify potential problems with the crankshaft and ensure that your engine is running properly. By following the steps in this guide, you can easily measure crankshaft runout and keep your engine in top condition.

Here are some key takeaways from this article:

• Crankshaft runout is the amount of wobble that the crankshaft has when it is rotating.
• It is measured in thousandths of an inch and should be less than 0.002 inches.
• You can measure crankshaft runout using a dial indicator or a rod vice.
• If the crankshaft runout is excessive, it can cause problems with the engine, such as decreased power, increased wear, and premature failure.

By following these tips, you can keep your engine running smoothly and avoid costly repairs.