04RT Oil Cap Leak

[Pananimal]

I have relpaced the O'ring twice in the oil cap but still get some oil leaking out. I "think" it happens more on days I ride a little harder like in the twisties. Is this normal? Is there a fix? Or do you just learn to live w/ it?

[bigboy]

hi

if you have just replaced your filter did you use one with a valve in it , if not you may be making a little to much oil pressure., or have you slightly overfilled it only a longshot but you never know.

[Michael Fajans]

The plastic sleeve into which the oil cap screws also has an o-ring that could be the source of your leak. To replace that you need to remove the valve cover.

[Boffin]

I have relpaced the O'ring twice in the oil cap but still get some oil leaking out. I "think" it happens more on days I ride a little harder like in the twisties. Is this normal? Is there a fix? Or do you just learn to live w/ it?

 

There is a tendency for the oil filler to leak. Changing the O ring helps, and some of the aftermarket 'secure' caps are beter in this respect. The plastic inner section of the filler plug can also leak a bit, it has its own o-ring part no 11 14 1 340 901, it may be worth swapping this part out as well.

 

Cya, Andy .

[Stan Walker]

Some of the BMW caps still had a little flashing left on them that prevents the O-ring from seating correctly. Just scrape it off if it has it.

 

Stan

[Bill_Walker]

some of the aftermarket 'secure' caps are beter in this respect.

 

And some of them aren't. I installed one (I'm sorry I can't remember which brand, but I think I got it from Bob's), double checked my installation against the instructions, and went for a ride. "Hmm, what's that smell? Smells like burned oil. [looks down] Oh, and it's all over my boot and my pants, too!" I put the stocker back in and haven't had a problem with it. But my RT is an '04 dual-spark, so maybe the new bits make a difference. Or maybe I'm just an idiot and did have it installed wrong.

[BobFV1]

It's pretty common for them to leak. I installed a moto-techniques aftermarket unit which replaces the cheap stock plastic cap and the plastic sleeve with finely machined steel pieces - an excellent mod!

 

http://www.moto-techniques.com/bmw.htm

[AnRSguy]

When I bought my new (to me) '04 R1150RT, I noticed mine was leaking after the 400+ mile ride home. Cleaned it up and thought it was just loose. Next day, 200 mile ride, same thing.

 

I finally discovered if I cleaned it REALLY well before reinstalling the cap, NO LEAK!

 

Clean the o-ring really well until it's dry and give it another try.

 

Just a thought.

[RickP]

Mine started leaking around 8K, both the inner threaded sleeve and outer cap were replaced under WARRANTY. No problems since. -RickP.

[DogGone]

Mine has always weeped a little. Just recently I noticed it getting much worse on long rides. Locsl service manager says TADT.

 

I swear, the next time he tells me that he's gonna be able to open up a boot store in his ass.

 

Damn, I forgot I'm supposed to be in my kinder/gentler phase. Well, I never said it would happen overnight.

 

pete

[Pananimal]

Thanks guys. I will look into the different checks. I rode two days hard this week up in the twisties and had the little leak I was concerned about but today I did more mellow countryside riding and it did just fine(no leakage).

Go figure!

[SnowDog]

I swear, the next time he tells me that he's gonna be able to open up a boot store in his ass.