Skip to main content

Archive

Show more

Diesel Engine Valve Adjustment Guide



A valve adjustment (sometimes also called an overhead) is vital to the health of your diesel engine to ensure proper combustion. This is often an overlooked task for proper engine maintenance; however, neglecting your valves could lead to a lot of unwanted hassles like loss of power and decreased fuel efficiency. Keeping a close eye on the valve lash can alert you to a problem before it leads to hefty repair costs for your diesel engine and a lot of unplanned downtime.

What is a valve adjustment?

The valve mechanism (push rod, lifter, and rocker arm assembly) is adjusted so that the lash has the proper clearance necessary to regulate the opening and closing of the valve. If the lash clearance is too great, it will affect the engines airflow and will eventually lead to valve damage. If the lash clearance is too tight, the valve cannot close and seal properly in the cylinder head, and exhaust gases will leak past the valve. The valve lash is also the only way for the valves to pass heat into the cylinder head.

When do I need to have a valve adjustment?

You should have your valve lash inspected at manufacturers recommended intervals. A sure sign that its time for a valve lash adjustment is if your engine is making a loud clicking or tapping noise when starting up or if you experience a loss in engine power. You can find more details on the suggested adjustment frequency here.
Why is a valve adjustment procedure important?

If you neglect to do a diesel engine valve adjustment for an extended period of time, a catastrophic failure of the valve and engine is likely to occur. A number of problems could occur that will hinder your trucks performance and potentially leave you with more repairs to address. These issues include:

    The engine will not operate at full power
    You will burn through fuel quicker
    You will have increased exhaust smoke

Should I attempt a diesel engine valve adjustment myself?

While some people do their own valve adjustments, there is a lot that can potentially go wrong. A valve that is not adjusted to the proper clearance could end up with exhaust gases leaking past the valve or worse engine performance. Either of those scenarios could end up costing you more money than getting your engine serviced by professionals.

Comments

Popular posts from this blog

New Yuchai engine YC6K600-D30 power for diesel generator 50Hz

Technical Parameters of Boduan 500KW Weichai Generator Set 6M33D572E200

  The 6M33D633E200 diesel engine is a special-purpose diesel engine for land-based power generation in the M33 series. It is a new-structure power generation diesel engine with a centrally - located turbocharger developed by Weichai Power Co., Ltd. in 2016. Continuous Power (COP): The maximum power at which the diesel engine can run continuously under a constant load with no limit on the annual operating hours. It is the ISO standard power. Prime Power (PRP): The maximum power at which the diesel engine can run continuously under variable loads with no limit on the annual operating hours. It is an ISO standard power that allows a 10% overload. Standby Power (ESP): The maximum power in a certain variable - power series that the diesel engine can operate for up to 200 hours per year. It is an ISO standard power with limited fuel consumption.   Operating Conditions and Applications of Baudouin  500KW Weichai Generator Set  Diesel Engine Power Classification Operating Co...

Yuchai Is Super Confident in Its Innovation

Founded in 1951, with 30 wholly-owned, holding and joint-stock subsidiaries, Guangxi Yuchai Machinery Group Co., Ltd. (hereinafter referred to as the Yuchai Group) is an internal combustion engine manufacturing base with the most complete spectrum of products in the country. In recent years, machinery manufacturing industry has been dropped off influenced by domestic and foreign economic situations, especially domestic overcapacity and unreasonable product structure. Reversely, Yuchai has sold over 3 million engines with the annualized revenues amount to RMB 40 billion. Over the years, as China ’ s largest engine R&D manufacturing base, Yuchai adjusts and optimizes its industrial structure and constantly strengthens its capacity for independent innovation. Therefore, the key technology continues to be the top in the sector for further keeping its own top leader in the industry. Innovation-Driven In 2013, seven world-class diesel-engine products for high-s...