2002 Nissan Pathfinder engine knock

If it walks like a duck and sounds like a duck. It's probably a duck.

This car has 200K miles on it. You're pretty much reached the life expectancy of that engine and having worn out bearings could be expected at this point. Obviously I can't diagnose a noise over the Internet but that is a logical expectation.

Hi,

That is a pretty bad engine knock. If you run the engine much more it will most likely lock up or throw a rod through the side of the block.

Unfortunately, the only repair is to replace the engine or rebuild it. I would recommend replacing it because they are about the same cost depending on how much damage is done but if you go with a new engine it will come with a warranty.

If you would like to confirm this, you can drain the oil and remove the filter to look for metal flakes. Also, you can remove the spark plugs and use a borescope to look in the cylinders to see if there is scoring because this sounds like a piston knock or at least the lower end.

In the future you can start a new post with your specific issue. This works because it is the same type of issue but we like to get all your vehicle specifics and issue because it makes it easier for others to find similar issues. Plus it keeps the threads shorter. If we only had one thread for all these types of vehicles with engine noises it would get pretty long and confusing and people would stop visiting the site. Thanks for your understanding.

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