If your truck has started ticking, missing, using more fuel than usual, or you’re finding metal in the oil, it might not be injectors or sensors — it could be camshaft wear.
A camshaft plays a critical role in engine timing. It controls how and when valves open and close, and when it starts to wear, the effects ripple through the entire engine.
Common Causes of Camshaft Wear
Wrong oil or old oil
Running the incorrect oil viscosity, stretching service intervals, or using oil that’s broken down reduces lubrication. Once oil thins out, the camshaft loses its protective oil film and wear accelerates fast.
Contamination
Coolant, fuel, or dirt in the oil acts like liquid sandpaper. Over-fuelling from injectors, coolant leaks, or poor filtration all dilute oil and strip away lubrication.
Low oil pressure
If an oil pump is failing, piston rings are worn, or oil galleries are restricted, the camshaft won’t get enough oil. Metal-on-metal contact follows.
Incorrect valve adjustment (overhead set)
Valves set too tight dig into the cam lobes.
Valves set too loose slap against them.
Either way, the hard facing on the camshaft wears away prematurely.
Poor rebuild break-in or dry starts
Starting an engine with an empty oil filter, insufficient oil, or poor priming after a rebuild can cause damage within seconds.
Overheating
Excessive heat stresses metal components and accelerates camshaft wear — especially when oil viscosity drops under high temperatures.
Warning Signs to Watch For
- Ticking or tapping noises, especially on startup
- Rough idle or misfires
- Increased fuel consumption
- Loss of power
- Metal flakes on the sump plug or in the oil filter
These are signs the camshaft’s hardened surface may be failing.
How We Diagnose Camshaft Issues
At Webbie’s Mechanical, we don’t guess.
We:
- Check oil pressure
- Cut open and inspect the oil filter
- Inspect for metal contamination
- Check and measure valve adjustments
- Carry out visual inspections where required
If replacement is needed, we also replace rockers, because they wear in the same contact area as the camshaft.
Preventing Camshaft Wear
- Use the correct oil and viscosity
- Keep service intervals on time
- Replace filters with every service
- Stay on top of overhead (valve) adjustments
- Address overheating issues early
📍 Webbie’s Mechanical
Because catching wear early saves engines.
