The camshaft seal is a small but important component that prevents oil from leaking out where the camshaft exits the engine. Over time, the seal can wear, crack, or harden, leading to oil leaks that may damage the timing belt or contaminate other engine parts. Replacing a worn camshaft seal helps maintain oil control and prevents costly engine damage.

What is a camshaft seal?

The camshaft seal (also known as a cam seal) is a rubber or silicone ring that sits at the end of the camshaft, usually behind the timing cover. Its job is to keep engine oil inside while allowing the camshaft to rotate freely.

Why do you need a camshaft seal?

Without a proper seal, engine oil can leak onto other components such as the timing belt or serpentine belt. This not only causes oil loss but can also damage the belt, leading to serious engine timing issues. The camshaft seal is vital for keeping your engine lubricated and protected.

How do you know when to replace a camshaft seal?

Signs of a failing camshaft seal include:

• Visible oil leaks around the front or rear of the engine
• Oil spots under the vehicle after parking
• Oil on or near the timing belt or cover
• Low engine oil levels without obvious consumption
• Burning oil smell from leaks onto hot components

What happens during a camshaft seal replacement?

A mechanic will:

1. Inspect the leak source to confirm the camshaft seal is faulty
2. Remove necessary components such as timing covers, belts, or gears
3. Extract the old, worn seal from the camshaft
4. Install a new seal and ensure a proper fit
5. Reassemble the timing system and engine components
6. Top up engine oil if needed and test for leaks

How much does a camshaft seal replacement cost?

The cost usually ranges between $300–$600, depending on vehicle make and whether the timing belt or other components need removal. Many mechanics recommend replacing the camshaft seal when doing a cambelt/timing belt service to save on labour costs.

Is it unsafe to drive with a leaking camshaft seal?

Yes. While small leaks may start as a nuisance, they can quickly worsen and cause oil loss or belt damage. If the timing belt is contaminated with oil, it can slip or break, leading to catastrophic engine damage. It’s best to repair a leaking camshaft seal promptly.