I have a 2005 rx8 auto. I was changing my coils and I noticed I had oil on my air filter and in the flex hose going to the filter box. What would cause this?

 

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Also, read the stickies in this forum https://www.rx8club.com/new-member-forum-197/

 

overfilling engine oil is common cause, as the vapors start to work their way back up the filler neck and the vacuum from the intake pulls the oil through the intake tract.

1. Take care in not to overfill your oil

2. An Oil CatchCan will help alleviate this.

 

or use funnel when u top-up the oil if u dont like to install catch can.

 

I would go with the catch can. Mine collects a lot of oil vapors and seems to condense them nicely. This keeps them from going through the engine. I run the oil fill, the oil injector vent and the intake lines to the input, and the Air Jet line to the output. Can slowly fills with very thin, very dirty oil. That oil does not go into intake, or into Jet Air.

Car is happy.

 

What all do I have to do to install a catch can. I can work on simple stuff like tune ups but this sounds complicated.

 

Literally pulling off the hose thats connected to the oil filler neck (the other end is going to your intake) and instead popping it into the catch can. The inlet of the catch can (they come with hoses as well in most cases) will connect to the oil filler neck.

Just imagine what you are doing here on a high level is placing a can in between that hose that runs from the oil filler neck to the intake.

Easy peasy.

 

Pull off hose at air filter tube. Examine size.

Go to hardware store.

Buy caps to cap off nipple.

Install cap.

Go to auto store.

Buy filter for the tube from the oil filler neck.

Install.


If you have SMOG check.

Uninstall.

Smaog car.

Re-install.

OR

Use funnel when filling oil and do not over fill.