Front and rear main engine seals

Hi,

Based on what you have done, dirt could have entered the engine. Therefore, I would recommend doing it. Also, when you review procedures, they are usually very specific to what is being done. In this case, they would have indicated the directions for seal replacement. It's unlikely that an oil change would have been mentioned.

Here is a link you may find helpful. It explains in general how it's done.

https://www.2carpros.com/articles/how-to-change-engine-oil-and-filter

I hope this helps. Let me know if you have other questions.

Take care,
Joe