EVO All Evo Model Discussion

Oil blow from crankcase breather

Thread Tools
 
Search this Thread
 
  #1  
Old 03-07-2012, 09:18 AM
myneksred's Avatar
myneksred
myneksred is offline
6th Gear
Thread Starter
Join Date: May 2010
Posts: 14
Likes: 0
Received 0 Likes on 0 Posts
Default Oil blow from crankcase breather

I recently rebuilt my engine on my 1994 FXSTS and now i am experiencing excessive oil coming from my crankcase breather. i have stretched the springs in my oil pump and still have the problem i was wandering if antone would has any ideas as to what would be causing the problem.
Hillbilly
 
  #2  
Old 03-07-2012, 05:34 PM
blair's Avatar
blair
blair is offline
Tourer
Join Date: Jul 2009
Location: Ontario Canada
Posts: 307
Likes: 0
Received 1 Like on 1 Post
Default

your oil tank may have to much oil in it ..... take a little bit out . You dipstick may read full , still take a little bit out
 
  #3  
Old 03-07-2012, 05:46 PM
tc's Avatar
tc
tc is offline
Cruiser
Join Date: Feb 2007
Location: Dublin, Ireland.
Posts: 138
Likes: 0
Received 4 Likes on 1 Post
Default

Sounds like oil breather, cam and pinion gears may not be aligned correctly.
 
Attached Thumbnails Oil blow from crankcase breather-untitled-1.jpg  
  #4  
Old 03-07-2012, 05:51 PM
Bama91's Avatar
Bama91
Bama91 is offline
Tourer
Join Date: Jan 2011
Location: Reidsville, NC
Posts: 350
Likes: 0
Received 0 Likes on 0 Posts
Default

Is it blowing at idle or on the road? Is it an aftermarket breather that you attached yourself? If it is positioned where air blows into the breather while riding it will not breathe and build up pressure and blow oil out when the pressure overcomes the outside force. Try repositioning the breather so wind pressure isn't against it while riding.
 
  #5  
Old 03-07-2012, 05:59 PM
miacycles's Avatar
miacycles
miacycles is offline
Elite HDF Member
Join Date: Sep 2007
Location: Bluffton, South Carolina
Posts: 4,468
Likes: 0
Received 10 Likes on 10 Posts
Default

What was stated above plus are the umbrella valves sealing?? What kind of rings and how many miles on the rebuild?? How hard are you riding it?? Are you sure the rings are in right side up and gapped properly??
 
  #6  
Old 03-08-2012, 07:48 AM
myneksred's Avatar
myneksred
myneksred is offline
6th Gear
Thread Starter
Join Date: May 2010
Posts: 14
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by miacycles
What was stated above plus are the umbrella valves sealing?? What kind of rings and how many miles on the rebuild?? How hard are you riding it?? Are you sure the rings are in right side up and gapped properly??
There is 200 miles on the rebuild. It is blowing at idle. I have not been riding hard following the break in period rules not overreving or let the engine chug. all the gaps are right and the rings are in properly.
 
  #7  
Old 03-08-2012, 07:50 AM
myneksred's Avatar
myneksred
myneksred is offline
6th Gear
Thread Starter
Join Date: May 2010
Posts: 14
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Bama91
Is it blowing at idle or on the road? Is it an aftermarket breather that you attached yourself? If it is positioned where air blows into the breather while riding it will not breathe and build up pressure and blow oil out when the pressure overcomes the outside force. Try repositioning the breather so wind pressure isn't against it while riding.
the breather was on the bike when i bought it. i do not have breather heads on the bike. will try repositioning the breather.
 
  #8  
Old 03-08-2012, 10:55 AM
miacycles's Avatar
miacycles
miacycles is offline
Elite HDF Member
Join Date: Sep 2007
Location: Bluffton, South Carolina
Posts: 4,468
Likes: 0
Received 10 Likes on 10 Posts
Default

Your bike should be a top breather. If your bike is a bottom breather, there is a piece of plastic that is a seperator that takes the oil out of the air going out of the breather. It goes in the tube that is in the gearcase below the breather gear. Is that in place???
.
 

Last edited by miacycles; 03-09-2012 at 06:30 AM.
  #9  
Old 03-08-2012, 01:01 PM
myneksred's Avatar
myneksred
myneksred is offline
6th Gear
Thread Starter
Join Date: May 2010
Posts: 14
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by miacycles
If your bike is a bottom breather, there is a piece of plastic that is a seperator that takes the oil out of the air going out of the breather. It goes in the tube that is in the gearcase below the breather gear. Is that in place???

WHere is this peice of plastic located do I need to Pull the cam cover to see it?
 
  #10  
Old 03-08-2012, 04:46 PM
miacycles's Avatar
miacycles
miacycles is offline
Elite HDF Member
Join Date: Sep 2007
Location: Bluffton, South Carolina
Posts: 4,468
Likes: 0
Received 10 Likes on 10 Posts
Default

Yes it is inside the cam cover, to the rear and slightly below the breather assembly. It is a round tube that goes horizantly through the case.
 


Quick Reply: Oil blow from crankcase breather



All times are GMT -5. The time now is 12:22 AM.