Question about 2003 Harley Davidson FLHTC Electra Glide Classic

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Oil leaking into carb

Petrol/oil mix is blowing at pressure from crankcase breather tube into carb

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All Harleys will get a little oil in the breather.

However, when mileage causes the rings to wear, combustion pressure can leak past the rings, causing higher pressure.

You didn't state your mileage, but at 11 years old, your engine might be ready for a top end rebuild.

Posted on Mar 22, 2014

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 4565 Answers

SOURCE: 89 Harley FLTCU oil coming from the crankcase breather tube and

This is an age old problem for the Harley engine. In you 89 model, the crankcase breaths from behind the oil pump through a tube that runs to the backside of the air filter assembly. Most people that I know, simply remove the tube coming up to the air filter and block the hole in the air filter assembly backing plate. At the breather, they run a short hose to just behind the transmission and cut it off there. This is similar to the earlier Shovelhead engine and the way it breathes. In 1994, Harley went to the "head breather system" which was better but it still gets oil into the air filter assembly.

There is one thing I saw on the aftermarket assessories market once called a "CatchCan". The breather tube ran to it and it seperated the oil from the air and the held it in a small container to be emptied on a regular basis. I have never used one nor have I ever seen one so all I can tell you is what the book said. Matter of fact, I cannot remember where I saw it now. Custom Chorme catalog, maybe. Good Luck, Steve

Posted on Apr 30, 2010

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SOURCE: I have A 2008 dyna with oil coming out of breather tubes.

I think you already found your problem. Too much oil can push out when hot. Set your level and clean up the mess, you should be OK!

Posted on Jul 08, 2009

  • 59 Answers

SOURCE: i have a 1984 FLHS

you either have too much oil in there or the engine needs rebuilding as the rings/bore will need sorting out.

Posted on Mar 18, 2011

  • 4565 Answers

SOURCE: need to see a diagram

Contact me directly at and I'll send you a drawing of the oil lines. Don't forget to remind me of what you need.


Posted on Jul 09, 2011

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My troy-bilt blower/vac is blowing oil out of the carb. what are some things that may cause this? Oil level? How do I know I have proper amount of oil? If I leave the foam filter and the carb cover on, the...

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