Symptoms of a Bad or Failing Camshaft Seal

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The camshaft seal is a round oil seal located in the cylinder head. It is responsible for sealing the end of the engine’s camshaft or camshafts between the top of the cylinder head and the valve cover gasket. Camshaft seals are usually made of durable rubber materials that allow them to have a long service life. However, over time, these seals can wear out and begin to leak oil. Any sort of engine oil leak is bad for the engine, as the oil is what protects the metal internal components of the engine from friction. Usually, a bad or failing camshaft seal will produce a few symptoms that can notify the driver that a problem has occurred and needs to be serviced.

Visible signs of oil leakage

The most obvious symptom of a problem with the camshaft seal is visible signs of oil leakage. Camshaft seals are usually located on the top of the cylinder head towards the rear of the engine and near the firewall. When they begin to leak, there will usually be traces of oil on the rear of the engine right below the valve cover, which can sometimes flow to the edges or corners of the engine.

Smoke from the engine bay

Another common symptom of a bad camshaft seal is smoke coming from the engine bay. If the oil leaking from a camshaft seal finds its way to a hot exhaust manifold or pipe, it will burn up on contact and produce smoke or produce the odor of smoke. The amount of smoke and intensity of the odor will depend on the severity of the oil leak. Small leaks may produce faint streaks of smoke, while large leaks may produce obvious trails.

A defective camshaft seal may not have an immediate or direct effect on engine performance, however, it can have an effect on reliability - as any oil leak is a compromise to the engine’s lubrication. If your vehicle displays any of the symptoms above, or if you suspect that your camshaft seal may be leaking, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if your car needs a camshaft seal replacement.


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Rigoberto

9 years of experience
706 reviews
Rigoberto
9 years of experience
Chevrolet Equinox - Brake Pads Replacement (Rear) - Niles, Illinois
Rigo was great! He got there early, finished the job early, left everything clean. He changed my rear pads and rotors. The original quoted time was 90 minutes, he was done in about 60. He knows what he is doing and I am recommending him to all my friends and coworkers.
Mercedes-Benz C250 - Brake Pads Replacement (Front, Rear) - Chicago, Illinois
Rigo is a maverick hands down. Don’t take your car for work elsewhere. Especially great at Mercedes—this guy knows his profession! I will be using him for everything related to my car going forward.

Arturo

25 years of experience
35 reviews
Arturo
25 years of experience
Kia Forte - Brake Pads Replacement (Front) - San Diego, California
ARTURO is great! very professional , fast, replaced my front brake pads and oil an filter change. everything now works and works well. Brakes have much improved stopping power and engine is smooth and quiet.Arturo is also kind and thoughtful. "Your mechanic" is very fortunate to have Arturo Lopez represent your company. I enthusiastically recommend him and "Your mechanic> as a fine operation Best regards to the Team Peter Marto
Nissan Maxima - Brake Pads Replacement (Front, Rear) - San Diego, California
Arturo was prompt and completed my brake repair, including new rotors in a very efficient manner. I am very pleased with the quality of the work and the parts and will definitely look to have him service our other car in the near future.

Scott

32 years of experience
345 reviews
Scott
32 years of experience
Lexus IS250 - Brake Pads Replacement (Rear) - Denver, Colorado
Always on time, speedy, professional, and pleasant to interact with. The work is always consistent and we'll done. I can't reccomend Scott highly enough!

Michael

10 years of experience
15 reviews
Michael
10 years of experience
Nissan Sentra - Brake Pads Replacement (Front) - Conyers, Georgia
He was promptly on time and got the job done efficiently in a timely manner. I really appreciate the rapid respone on getting the job done! I would most definitely use this service again.

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