Overhead Valve Adjustment

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About Our Overhead Valve Adjustment Service

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 engine’s 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 manufacturer-recommended intervals. A sure sign that it’s 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. Call us to find more details on the suggested adjustment frequency.

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 truck’s performance and potentially leave you with more repairs to address. These issues include the engine not operating at full power, hard starts, burning through fuel more quickly, and 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. Worst case you can damage the engine components during this complicated repair. Either of those scenarios could end up costing you more money than getting your engine serviced by the professionals at STS Truck Services in Blair, Nebraska.

STS Truck Services has been serving the Blair region since 2005. You can trust that our family of mechanics will inspect your vehicle's engine and perform any necessary repairs. Call us if you have specific questions, or contact us to schedule an appointment today. We look forward to taking care of you and your vehicles.

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