The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE FORUM > Sportster Motorcycle Motor / Engine > Sportster Motorcycle - Bottom End
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Sportster Motorcycle - Bottom End Cams, Cases, Gears, Flywheel, Piston Conecting Rods, Oil Pump, etc...

Active Threads
0 Piston size id?
Last Post: brucstoudt
Posted On: 1 Minute Ago
Replies: 31
Views: 632
0 Knocking noise in front cylinder!!!!
Last Post: Rossline
Posted On: 3 Minutes Ago
Replies: 3
Views: 40
0 Forum problems???
Last Post: 60Gunner
Posted On: 24 Minutes Ago
Replies: 59
Views: 2,475
5 Harley T-Shirts
Last Post: harley506d
Posted On: 25 Minutes Ago
Replies: 269
Views: 41,711
0 Age limit where belts should be replaced?
Last Post: harley506d
Posted On: 29 Minutes Ago
Replies: 12
Views: 153
6 Hello from Central Vermont
Last Post: JonW.
Posted On: 41 Minutes Ago
Replies: 7
Views: 48
0 91-99 Lifter Pin Upgrade to 00-05 Lifter Pin Screws
Last Post: bustert
Posted On: 55 Minutes Ago
Replies: 16
Views: 602
0 '06 Sporster Oil Tank drain
Last Post: hammer6315
Posted On: 58 Minutes Ago
Replies: 29
Views: 3,862
0 Fuel Pump Problems
Last Post: hammer6315
Posted On: 1 Hour Ago
Replies: 257
Views: 143,728
0 Old Parts
Last Post: Hopalong48
Posted On: 1 Hour Ago
Replies: 5
Views: 191
3 Ironhead Pictures Thread
Last Post: Island Dude
Posted On: 1 Hour Ago
Replies: 1,979
Views: 782,722
0 1979 XLH Carb
Last Post: rokytnji
Posted On: 1 Hour Ago
Replies: 7
Views: 123
0 Hello from Murcia-SPAIN
Last Post: rokytnji
Posted On: 1 Hour Ago
Replies: 14
Views: 456
0 Gibt es hier keine Deutschen?
Last Post: Clementine
Posted On: 1 Hour Ago
Replies: 13
Views: 522
0 This week on Craig's list
Last Post: ryder rick
Posted On: 1 Hour Ago
Replies: 3,767
Views: 419,699
0 Hello from Germany
Last Post: Clementine
Posted On: 1 Hour Ago
Replies: 21
Views: 280
0 Operation Live Wire
Last Post: WI_duker
Posted On: 2 Hours Ago
Replies: 36
Views: 3,458
0 Need recommendations for 17"/18" Wheels (or maybe 19..)
Last Post: Edster
Posted On: 2 Hours Ago
Replies: 2
Views: 79
0 Trip to Rockies
Last Post: Blues
Posted On: 2 Hours Ago
Replies: 0
Views: 25
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Folkie
Posted On: 2 Hours Ago
Replies: 42,869
Views: 6,705,913
0 Original sealant from HD for case halves
Last Post: ryder rick
Posted On: 2 Hours Ago
Replies: 31
Views: 1,083
0 Magnetos
Last Post: Scott
Posted On: 2 Hours Ago
Replies: 1
Views: 36
0 Nothing much
Last Post: ryder rick
Posted On: 2 Hours Ago
Replies: 2
Views: 67
0 Do you blip the throttle when downshifting?
Last Post: 83ironman
Posted On: 3 Hours Ago
Replies: 451
Views: 68,880
0 PLEASE READ THIS Before You Post In 'The BUY - SELL - TRADE Zone'!
Last Post: Folkie
Posted On: 3 Hours Ago
Replies: 1
Views: 4,852
0 Oil Analysis?
Last Post: shanneba
Posted On: 4 Hours Ago
Replies: 3
Views: 73
0 Crusty's Travels
Last Post: Bluto
Posted On: 4 Hours Ago
Replies: 1,975
Views: 235,723
0 Hottie of the day, no nudity.
Last Post: trainman
Posted On: 4 Hours Ago
Replies: 9,994
Views: 879,564
0 Premium vs stock lifters Sportster 48 questions
Last Post: Toejam503
Posted On: 4 Hours Ago
Replies: 41
Views: 1,338
0 electronic ignition
Last Post: Crusty
Posted On: 5 Hours Ago
Replies: 3
Views: 72
More...
Members Birthdays
hubbinator (70), sport53 (66), kship (54), jrmkel (40), IR88n3 (35), waltweezy45 (32), lumberjack (29)
Sponsored Links
Reply
 
Share Thread Tools Display Modes
  #1  
Old 1st September 2018
T_worth T_worth is offline
Biker
 
Join Date: Jun 2018
Posts: 54
Sportster/Buell Model: Xlh 1200
Sportster/Buell Year: 96
Reputation: 10
T_worth is an unknown quantity at this point
Default Crooked crankcase

I just got a 96’ sporty 1200 with a crankcase whose surfaces aren’t aligned. When the bike is at proper running temp, there is an oil leak coming from the seam of the crankcase that’s just behind the oil filter. I might have another leak further along the crankcase seam just below the oil filter.

I am just about to start a top end rebuild, and I might be replacing the clutch. I was wondering, with the engine mounts, primary cover, and cylinders off. Could I loosen the crankcase hardware just enoug to tap the crankcase in position where the surfaces are aligned better?

My thinking is if I can loosen the bolts, and tap the crankcase with a rubber mallet. Then tighten everything back up. That it might fix my oil leak. Right?
Reply With Quote
  #2  
Old 1st September 2018
DEEP DIVER's Avatar
DEEP DIVER DEEP DIVER is offline
XL FORUM TEAM MEMBER
 
Join Date: Jan 2008
Location: IN MY SHED IN SUFFOLK
Posts: 3,152
Sportster/Buell Model: XLH 1000
Sportster/Buell Year: 1984
Sportster/Buell Model #2: XL 1200
Sportster/Buell Year #2: 1993
Other Motorcycle Model: BMW R80ST
Other Motorcycle Year: 1984
Reputation: 5405212
DEEP DIVER has a reputation beyond reputeDEEP DIVER has a reputation beyond reputeDEEP DIVER has a reputation beyond reputeDEEP DIVER has a reputation beyond reputeDEEP DIVER has a reputation beyond reputeDEEP DIVER has a reputation beyond reputeDEEP DIVER has a reputation beyond reputeDEEP DIVER has a reputation beyond reputeDEEP DIVER has a reputation beyond reputeDEEP DIVER has a reputation beyond reputeDEEP DIVER has a reputation beyond repute
Default

I think not. Once you undo the bolts and tap the case you'll break the seal on the rest of the case and the whole lot will leak. It would be best to do a full engine strip and reseal the cases.
__________________
Barry the Cantankerous old git.

Blue belt in Serious tea drinking.
Reply With Quote
  #3  
Old 1st September 2018
aswracing's Avatar
aswracing aswracing is offline
A Million Facts & Figures
 
Join Date: Jan 2005
Location: Famous Potatoes
Posts: 9,936
Sportster/Buell Model: XL883
Sportster/Buell Year: 2007
Sportster/Buell Model #2: Buell Cyclone
Sportster/Buell Year #2: 1999
Reputation: 2216956
aswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond repute
Default

Quote:
Originally Posted by T_worth View Post
I just got a 96’ sporty 1200 with a crankcase whose surfaces aren’t aligned. When the bike is at proper running temp, there is an oil leak coming from the seam of the crankcase that’s just behind the oil filter. I might have another leak further along the crankcase seam just below the oil filter.

I am just about to start a top end rebuild, and I might be replacing the clutch. I was wondering, with the engine mounts, primary cover, and cylinders off. Could I loosen the crankcase hardware just enoug to tap the crankcase in position where the surfaces are aligned better?

My thinking is if I can loosen the bolts, and tap the crankcase with a rubber mallet. Then tighten everything back up. That it might fix my oil leak. Right?
You're not going to tap the crankcases anywhere. The two crankcase halves are held in alignment by dowels. There's no play to speak of. And you wouldn't want to change the alignment even if you could. Your crankshaft engages in both crankcase halves, and the places where it engages on both sides are carefully machined to be in alignment and the pinion race is line-lapped to perfect alignment with the sprocket shaft on the opposite case half. If you could somehow change the alignment between the two case halves, you'd cause major problems for both of those bearings. Same applies to the transmission mainshaft and countershaft.

Yours is not the first motor of that vintage to get seeping along the case half seal. I have had some success in the past by carefully cleaning it (lacquer thinner), applying a vacuum to the breathers (in the heads) using a Mightyvac, and then externally applying a quality case half sealer like Three Bond. The vacuum helps pull it into the seam.
__________________
Click Here to Contact Me

Reply With Quote
  #4  
Old 3rd September 2018
bustert's Avatar
bustert bustert is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2008
Posts: 8,814
Sportster/Buell Model: 1200s
Sportster/Buell Year: 2001
Sportster/Buell Model #2: xlch
Sportster/Buell Year #2: 1974
Reputation: 1599007
bustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond repute
Default

very ingenious
i just discovered that vacuum can be a very useful tool!! pops 13.6-28 tractor tires right off, will try it on my next tire change on my sport.
that one needs to be included in a sticky, what say ye?
Reply With Quote
  #5  
Old 6th September 2018
T_worth T_worth is offline
Biker
 
Join Date: Jun 2018
Posts: 54
Sportster/Buell Model: Xlh 1200
Sportster/Buell Year: 96
Reputation: 10
T_worth is an unknown quantity at this point
Default

Quote:
Originally Posted by aswracing View Post
Yours is not the first motor of that vintage to get seeping along the case half seal. I have had some success in the past by carefully cleaning it (lacquer thinner), applying a vacuum to the breathers (in the heads) using a Mightyvac, and then externally applying a quality case half sealer like Three Bond. The vacuum helps pull it into the seam.
I'm very curious about this method. Are there any tutorials or instructions on using the mityvac on the cylinder head breathers? Should I plug any other areas to ensure proper vacuum along the crankcase seam?
Reply With Quote
  #6  
Old 8th September 2018
bustert's Avatar
bustert bustert is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2008
Posts: 8,814
Sportster/Buell Model: 1200s
Sportster/Buell Year: 2001
Sportster/Buell Model #2: xlch
Sportster/Buell Year #2: 1974
Reputation: 1599007
bustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond repute
Default

on your model, you have the timing plug so you could apply the vac source there, the breather valves will naturally close off. on models without the timing plug, could use the cps hole with a rubber stopper with nipple to hook up pump, no need to pull stuff off the intake/vent sys.
it is amazing what people can come up with thinking out the box. +1 aswracing!
Reply With Quote
  #7  
Old 8th September 2018
Four Speed Four Speed is offline
Senior Chief Master Mechanic 1st Class
 
Join Date: Dec 2015
Posts: 1,204
Sportster/Buell Model: Sportster 883 Hugger
Sportster/Buell Year: 1988
Reputation: 415800
Four Speed has a reputation beyond reputeFour Speed has a reputation beyond reputeFour Speed has a reputation beyond reputeFour Speed has a reputation beyond reputeFour Speed has a reputation beyond reputeFour Speed has a reputation beyond reputeFour Speed has a reputation beyond reputeFour Speed has a reputation beyond reputeFour Speed has a reputation beyond reputeFour Speed has a reputation beyond reputeFour Speed has a reputation beyond repute
Default

Quote:
using a Mightyvac, and then externally applying a quality case half sealer like Three Bond. The vacuum helps pull it into the seam
Neat! And this presumably explains why a decent non-return valve breather can reduce oil leaks.
Reply With Quote
  #8  
Old 26th September 2018
T_worth T_worth is offline
Biker
 
Join Date: Jun 2018
Posts: 54
Sportster/Buell Model: Xlh 1200
Sportster/Buell Year: 96
Reputation: 10
T_worth is an unknown quantity at this point
Default

With further progress on the top end rebuild, I removed the cylinders and base gasket and am down to the crankcase. From looking inside the crankcase through the front cylinder base. I can actually see the seam of the crankcase.

Instead of using a MityVac, could I just clean the inside mating surface with cleaner and apply Three Bond 1184 Gasket Sealer on the inside AND outside of the crankcase. Wouldn't that seal up the leak?

https://imgur.com/a/fKhtaZi
Reply With Quote
  #9  
Old 26th September 2018
Turbo Sporty 48 Turbo Sporty 48 is offline
Master Custom Bike Builder
 
Join Date: Sep 2010
Posts: 3,344
Sportster/Buell Model: XL1200X Turbo 48
Sportster/Buell Year: 2011
Sportster/Buell Model #2: XL1200 Roadster
Sportster/Buell Year #2: 2008
Turbo Sporty 48 has disabled reputation
Default

Why didn't you try Aarons suggestion?
If it were me, I would probably slobber that goo in places it should not be, choke up the oil pump and lunch the motor. Hope you are better than me.
Gonna tear down the rascal? Welding or goo? Good luck.
Reply With Quote
Sponsored Links
  #10  
Old 26th September 2018
T_worth T_worth is offline
Biker
 
Join Date: Jun 2018
Posts: 54
Sportster/Buell Model: Xlh 1200
Sportster/Buell Year: 96
Reputation: 10
T_worth is an unknown quantity at this point
Default

Quote:
Originally Posted by Turbo Sporty 48 View Post
Why didn't you try Aarons suggestion?
If it were me, I would probably slobber that goo in places it should not be, choke up the oil pump and lunch the motor. Hope you are better than me.
Gonna tear down the rascal? Welding or goo? Good luck.

Its not that I'm against trying to use the vac, I just thought this would be a more direct application. A little goo smear on the inside and outside of seam and good to go. Do people have doubts about applying sealant on the inside of the crankcase?
Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Sponsored Links
All times are GMT +1. The time now is 23:11.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC