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[porthole]

2 Weeks ago when I decided to "test" the map I had just downloaded I did a bit of WOT. Only took a few seconds to smell the burning oil and see oil splattered everywhere.

The dipstick blew out. Got home, put some oil absorbents under the bike and went back in the truck and found the dip stick.

I may have overfilled the tank a bit, not sure.

Anyway, with the level a little lower I was a little gunshy for the past 2 weeks, until yesterday. Another WOT entry onto the highway and the same result!

Only this time I was only able to find the chrome cap from the dipstick 

Of course the dealer only had ONE style of dipstick in stock - the expensive one.

So - all I did to the bike was 575 cams, SE plate and oil pump (with fueling spring) and pipes - oh - and a Baker +1 pan..

I never had a problem before (35,000 miles).

Is this an oil pump scavenge issue?

The LCD cap "locks In'. With the cap locked in where is the pressure going to go if the cap doesn't relive it?

What are the fixes?

The Baker spout will solve the problem of the dipstick blowing out - but again, what about the pressure?

Fueling makes a pricey little vent that tees into the engine vent line.

[Gettinold]

2 Weeks ago when I decided to "test" the map I had just downloaded I did a bit of WOT. Only took a few seconds to smell the burning oil and see oil splattered everywhere.

The dipstick blew out. Got home, put some oil absorbents under the bike and went back in the truck and found the dip stick.

I may have overfilled the tank a bit, not sure.

Anyway, with the level a little lower I was a little gunshy for the past 2 weeks, until yesterday. Another WOT entry onto the highway and the same result!

Only this time I was only able to find the chrome cap from the dipstick 

Of course the dealer only had ONE style of dipstick in stock - the expensive one.

So - all I did to the bike was 575 cams, SE plate and oil pump (with fueling spring) and pipes - oh - and a Baker +1 pan..

I never had a problem before (35,000 miles).

Is this an oil pump scavenge issue?

The LCD cap "locks In'. With the cap locked in where is the pressure going to go if the cap doesn't relive it?

What are the fixes?

The Baker spout will solve the problem of the dipstick blowing out - but again, what about the pressure?

Fueling makes a pricey little vent that tees into the engine vent line.

Duane not sure if you already have been doing this but each time you remove the dipstick, clean the sealing surfaces with brake clean. dont ask me or any other member why we now this.  I thanke Helen and her boots & pants for not losing my stick.
I beleive someone also makes a filler cover that is threaded like the newer models and like it should of been.       Hope this helps
 
                             Dave.

[hogasm]

Haven't had a problem since my one time overfill

Still run motor .5 quart under full and no problems

[skreminegul07]

Haven't had a problem since my one time overfill

Still run motor .5 quart under full and no problems

Ditto that, Brian.  I have never been able to put in any bike what they recommend.  Put in two + quarts, check it hot then add. 

[Boatman]

I can remember several threads on this topic but don't believe there was ever a solution (s).  Overfull the most common response for solution.   Don't know what the answer is.  Overfull not a scenario for you I don't believe.


Got a couple of chuckles though:

Duane- "All I did was------------------"

Dave-   "Helen's boot/leg was good---------"

 

 

[efrbc1]

Very similar build as yours (Feuling oil pump instead of SE) and have never had that happen.  Never really gotten on it other than a couple of runs to redline to see how it ran.  I have the "old" style LCD temp dipstick which you have to "unscrew" which may make a difference.

Chris

[DESERTBEAR54]

If your oil got changed and they or you didn't fill the new oil filter with oil there is a good chance that you got an air pocket in the oil system.That air pocket builds pressure and blows out dipsticks!!

[DCFIREMANN]

THE DIPSTICK PROBLEM IS THE ONE DIRVING THE BIKE!!!!!

Duane I had the same problem with Punkin right after the rebuild. The fueling pump has something to do with it. I did clean the surfaces where the dip stick goes in and have never had the problem since. Do you use syn oil? I do and that was the cause. It is so slick the added pressure built up in the motor would blow it right out. OH and more than once. Try cleaning BOTH surfaces with 2 + 2 and see if it continues.

Be Safe

THE DAWG

[grc]

THE DIPSTICK PROBLEM IS THE ONE DIRVING THE BIKE!!!!!

Duane I had the same problem with Punkin right after the rebuild. The fueling pump has something to do with it. I did clean the surfaces where the dip stick goes in and have never had the problem since. Do you use syn oil? I do and that was the cause. It is so slick the added pressure built up in the motor would blow it right out. OH and more than once. Try cleaning BOTH surfaces with 2 + 2 and see if it continues.

Be Safe

THE DAWG

Seems I remember several other folks having a "blow-out" with the dipstick after installing Fueling pumps a couple years back.  Increasing the scavenging volume could pressurize the sump I suppose, but that's why there is a vent.  Are we saying that the stock vent is too small?

I don't go to the extreme of using solvent on my dipstick and housing, but I do wipe both surfaces with a dry cloth after checking the oil.  Haven't had any dipstick issues since doing that and running a pint low, but I still have the stock pump installed.  I guess I'll see if the late model pump makes a difference when I install the new plate and cams next month.  Maybe I'll have to install a safety strap to contain the wayward parts.          

Jerry

[Boatman]

Maybe I'll have to install a safety strap to contain the wayward parts.          

Jerry

Dave just relies on Helen's boot/leg.

[Twolanerider]

The red bike has an almost-issue with ejecting the dipstick Duane.  And it's got Feuling pump and plate.  Though bikes without Feuling pumps have also occasionally puked out their dipstick for years.

On the red bike I can make it happen if I wish.  The bike had a slight oil mist from the heads after the engine work.  Not bad.  But any makes a mess.  Initially I just vented it.  Long line to the ground.  No big deal and no problems.

One Saturday last year I was bored and thought it would look "cleaner" taken to the air cleaner.  So plumbed both sides to the rear of the backplate in an OE-ish fashion.  Took the bike out and almost immediately belched out the dipstick.  Just a bit more overall backpressure this way than simply vented to atmosphere apparently.

Would spit it out under medium or greater acceleration that crossed 3500 or so.  Repeated it three times just to be sure.  Then got some nicer looking braided line and made a new tidier vent to atmosphere.  Put it back that way and never worried about it again.

[porthole]

Then got some nicer looking braided line and made a new tidier vent to atmosphere.  Put it back that way and never worried about it again.

What vent are we talking about here?

[porthole]

Just some tidbits

I never had this problem in the past 35,000 miles.

Same oil for the last 27-30,000 miles - Mobil V-Twin 20W-50.

Changes are a Screamin Eagle oil pump, Fueling spring (about a 15 psi higher average), Zippers 575 cams. And the Baker oil pan.

Baker is the company that makes the screw in dipstick.
Fueling makes a vented line that is part of the cam chest to oil filler line.

If you put a screw in cap to eliminate the dip stick blowing - where does that pressure go then 

Is there anyway to check the scavenging effect for the pump?

Right now the bike has a LCD dip - twist to unlock to remove. That should solve the blowout but where is the pressure going to go?

The dipstick blowing out is a symptom - I'd like to find out the cause. 35K and never an issue......................................

[sadunbar]

Duane,

Increased crankcase pressure - caused by your now more efficient oil pump - is causing your dipstick to blow out...  Some are suggesting that cleaning wayward oil from your dipstick and dipstick receiver creates enough increased friction to stop the problem - which indicates they had just a slight amount of excess internal pressure causing the problem (barely over the line).  Twolane suggests increased venting of the internal pressure (via the heads) reduces the internal pressure enough to stop the problem (more of a root cause solution).  Feulings "vented line" also is more of a root cause solution - as it also will reduce the internal pressure of your motor...

That is the scoop....pick your solution!   

[Gettinold]

Dave just relies on Helen's boot/leg.

Bob LOL you took the words right out my fingers.  Only happened once and that was enough. I "did not" repeat "did not" over fill the crank case. So far so good.
Cost me 3-4 hrs of deatailing, a sore back and knees, a pair of boots, a pair of jeans, and a shot in the ribs for blasting a cager that did a Texas stop n go in frt of me.