Hi and thanks for using 2CarPros.
Yes there is a cam seal. To replace it, the valve cover must come off. I attached a picture of the rear of the engine. The round section between the valve cover and cylinder head is the location of the seal.
Let me know if this helps. Also, I am surprised that wasn't replaced. It should have at least been checked. Maybe they can help you and lower the labor since it was missed. That's just a thought.
Take care and let me know if you have other questions.
Joe
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Tuesday, January 15th, 2019 AT 8:17 PM