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What causes my diesel engine valves to break?

Posted by Alex Smith on

Diesel engines are durable and fuel-efficient, so the last thing you want is for your engine valves to break routinely. These motorheads discuss some of the reasons you might be setting them up to break and some steps you can take to prevent it.

Henry Purchase

Henry Purchase

Lead Organic Growth of .

Improper Maintenance, Improper installation, Incorrect Operation

Diesel engines are known for their durability and longevity, but like all machines, they can fail. Diesel engines utilize piston valves to control the flow of fuel and air into the engine. These valves are made of metal and can break if they are not handled properly. There are several factors that can cause diesel engine valves to break. These include improper maintenance, improper installation, and incorrect operation.

Improper maintenance can include not cleaning the valves, not lubricating them, and not replacing them if they wear out.

Improper installation can include not using the correct size valve, not using the correct type of valve, or not using the correct grade valve metal.

The incorrect operation can include over-revving the engine, running the engine in an overheated state, or using the wrong type of fuel. If you notice that your diesel engine valves are breaking, it is important to take action.

This includes cleaning the valves, lubricating them, and replacing them if they are worn out. By taking these simple steps, you can ensure that your engine continues to run smoothly and that your valves will last longer.

Andrew Latenko

Andrew Latenko

Content Writer at

Inadequate Lubrication, Incorrect Valve Clearance, or Excessive Heat

There are a number of potential causes for diesel engine valves to break, including inadequate lubrication, incorrect valve clearance, incorrect valve timing, excessive heat, and overloading. Additionally, improper maintenance or use of contaminated fuel can also contribute to valve breakage.

Other possible causes include:

  • Excessive valve spring pressure
  • Incorrect valve materials
  • Valve seat wear
  • Incorrect fuel injection timing
  • Contaminated fuel
  • Thermal shock
  • Incorrect valve lash setting
  • Carbon build-up on the valves
Michal Suski

Michal Suski

Co-Founder & CPO of .

Valve Seat Failure, Faulty Part Installation, and Inadequate Lubrication

When it comes to diesel engine valves breaking, there are a few potential causes that could be responsible. One of the most common reasons for them to fail is due to wear or fatigue on the valve seat. This can occur over time as exposure to heat or pressure can cause material within the valve seat to weaken or degrade, leaving it susceptible to failure.

Additionally, faulty installation of new parts, such as exhaust valves, can lead to them being too tight in their seats, resulting in cracks or breaks when they eventually open up during operation. Finally, inadequate lubrication on moving components within diesel engines can result in increased friction. [This] makes them more likely to wear out prematurely, leading to a possible failure of their associated valves.

This is a crowdsourced article. Contributors' statements do not necessarily reflect the opinion of this website, other people, businesses, or other contributors.


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