Rev Up Your Automotive Smarts

DIY Diagnosis: How to Check for Bent Valves in Your Engine with Household Tools

At a Glance

  • Checking for bent valves is a relatively simple process that can be done at home with a few basic tools.
  • Repairing bent valves is a relatively complex process that should be performed by a qualified mechanic.

Bent valves are a common problem that can occur in internal combustion engines. When valves become bent, they can cause a variety of problems, including engine misfires, loss of power, and poor fuel economy. In severe cases, bent valves can even lead to engine damage.

If you suspect that your engine has bent valves, it is important to have them checked and repaired as soon as possible. Checking for bent valves is a relatively simple process that can be done at home with a few basic tools.

Symptoms of Bent Valves

The following are some of the most common symptoms of bent valves:

  • Engine misfires
  • Loss of power
  • Poor fuel economy
  • Rough idle
  • Backfiring
  • Knocking or ticking noises from the engine

Causes of Bent Valves

Bent valves can be caused by a variety of factors, including:

  • Overheating
  • Detonation
  • Valve float
  • Piston-to-valve contact

How to Check Cylinder Head for Bent Valves

To check for bent valves, you will need the following tools:

  • Valve spring compressor
  • Dial indicator
  • Straight edge
  • Feeler gauge

1. Remove the valve cover.
2. Locate the valve springs.
3. Compress the valve springs using the valve spring compressor.
4. Place the dial indicator on the valve stem.
5. Zero the dial indicator.
6. Rotate the crankshaft slowly while watching the dial indicator.

If the dial indicator moves more than 0.002 inches, the valve is bent.

Repairing Bent Valves

If you find that your engine has bent valves, you will need to have them repaired or replaced. Repairing bent valves is a relatively complex process that should be performed by a qualified mechanic.

Preventing Bent Valves

The following are some tips for preventing bent valves:

  • Avoid overheating your engine.
  • Use high-quality fuel.
  • Avoid detonation.
  • Avoid valve float.
  • Have your engine regularly serviced by a qualified mechanic.

Takeaways: How to Check Cylinder Head for Bent Valves

Bent valves can be a serious problem, but they can be prevented and repaired. By following the tips in this guide, you can help to keep your engine running smoothly and efficiently.

Questions We Hear a Lot

What are the symptoms of bent valves?

The symptoms of bent valves include engine misfires, loss of power, poor fuel economy, rough idle, backfiring, and knocking or ticking noises from the engine.

What causes bent valves?

Bent valves can be caused by a variety of factors, including overheating, detonation, valve float, and piston-to-valve contact.

How to check for bent valves?

To check for bent valves, you will need the following tools: valve spring compressor, dial indicator, straight edge, and feeler gauge.

How to repair bent valves?

Repairing bent valves is a relatively complex process that should be performed by a qualified mechanic.

How to prevent bent valves?

The following are some tips for preventing bent valves:

  • Avoid overheating your engine.
  • Use high-quality fuel.
  • Avoid detonation.
  • Avoid valve float.
  • Have your engine regularly serviced by a qualified mechanic.
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About the Author
Cars have been my passion from a young age as I enjoyed learning how engines work, spending hours dreaming about the supercars I hoped to own, and I now have my dream job as a product designer for a luxury automaker. In my spare time I love going to car...