G oog le BadWeB | Login/out | Topics | Search | Custodians | Register | Edit Profile

Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Engine » Breathers (crankcase breathing system) « Previous Next »

Got oil dripping out of your crankcase breather(s)?

1. Ensure engine oil level is between full and low marks on dipstick (check hot engine with bike straight and level, insert dip stick fully).

2. Switching to a good well trusted name brand synthetic oil, due to its superior tolerance for high temperatures, may reduce/eliminate oil escaping out the breather(s).

3. If engine oil level is within proper range and synthetic oil hasn't vanquished the problem, oil emissions via the crankcase breather may indicate excessive blowby. Verify the integrity of your piston-ring to cylinder seal via standard compression and leakdown testing (cheap). If compression is below spec and/or leakdown is greater than 10%, your engine may need a top end refreshment (new rings and rehoned/rebored/oversize cylinders). Make sure the honing or reboring is done by a reputable shop that understands the importance of proper boring fixture setup (cylinder must be clamped between fixture, often called "torque plates" to simulate its condition as installed/bolted into the engine between cases and cylinder head).


Dyno Test Results - Breather Check Valves

Start New Engine Breather Topic

Start New Thread
  Thread Last Poster Posts Pages Last Post
Oil Seal (Crank)Sportyeric21 05-23-16  04:14 am
Venting the bottom end ?X3rs10-05-15  11:51 am
Breather hose quesiton.Bluzm205-23-15  12:24 pm
Forcewinder XR2 breather ??Kilroy04-02-15  05:15 pm
Exhaust spewing out of timeing portBuell_bert08-07-12  02:29 pm
Pushes oil out of tankKilroy05-08-12  12:01 pm
Stock breather hose routing?Reepicheep10 02-09-12  03:53 pm
Which kit?Mstrfrz12-15-11  11:25 am
Hypercharger stainless breather lines?Cyclone0008-23-10  10:50 pm
Breather Routing QuestionAptbldr07-12-10  07:57 am
Home made catch can made out of beer canBuckeye8617 05-16-10  03:38 pm
What happens when you plug the breather hole?V7403-19-10  08:22 am
General breather Q'sNewxb12ss11-01-09  02:41 pm
Breather re-route problems w/ XBGunut7509-15-09  08:38 am
Oil gushing out of breatherGordo08-31-09  04:00 pm
2000 M2 Cyclone crank breather and RI State InspectionClutchless07-22-09  04:22 pm
Breather filter getting wetHosephnj07-13-09  01:58 pm
Braided Stainless lines (Cutting)Bluzm206-13-09  10:18 am
K & N High Flow Air FilterAptbldr06-11-09  07:17 am
OIL LEAKHughlysses04-09-09  06:58 pm
The second Elboe on CV carb- plugged it upSparky02-06-09  01:29 am
Sorry for the stupid Q but why do I need a catch can?Bombardier02-05-09  08:24 pm
'00 M2 conversion to xb rocker box coversTim01-08-09  09:19 pm
Budget Breather/Catch Can ThreadBuford42 01-06-09  12:16 pm
Simple crankcase venilation draft tubeBuford01-04-09  02:00 pm
Restricted breather symptoms?Pkforbes8711-02-08  09:14 am
Eliminating california emissions on 08xb12sGhost_rider3305-28-08  02:53 am
Breather sprayHeysoos11 05-17-08  02:04 pm
05 XB12R rebuildP3ordie04-19-08  06:07 pm
XB transmission breather hoseDjkaplan11-08-07  05:52 pm
Breather boltJackbequick09-01-07  08:50 pm
Got oil dripping out of your crankcase breather(s)? Djkaplan08-01-07  10:16 am
White Substance Coming from breather tubesReepicheep05-23-07  08:59 am
Jardine exhaust Al_lighton05-21-07  10:07 am
Breather hose protrusion distance into air boxGrahamnz04-23-07  08:02 pm
XB rocker cover conversion ?Gotj13 04-21-07  07:52 am
00 m2 burns alot of oil..i mean alot!!!Road_thing10 04-08-07  08:00 pm
Billet Catch CanFtd01-22-07  10:31 am
Looking for ultimate solution....Bigdog_tim10 12-22-06  12:32 am
Exhaust crank case breather system why not ??Jackbequick11-18-06  10:01 am
Billet / baby bottle?Reepicheep11-15-06  12:35 pm
XB Breather mods?Fullpower10-31-06  08:53 pm
Oil Loss and alot of puking!!!Sdunkf10-31-06  04:32 pm
Crankcase Breather Bolt Sealer???Jackbequick10-16-06  12:11 pm
02 m2 breather bolt hosesStevedplumber09-13-06  12:10 pm
Air leakLutes88809-02-06  12:56 pm
CleaningPammy07-10-06  09:36 am
Crankcase breather question.Milehighx106-14-06  11:43 am
Mikuni Breather BoltsItalialaw03-29-06  11:36 am
Catch can helpJackbequick12 03-04-06  12:17 pm
Breather hose questionSgthigg01-15-06  03:50 am
ArchivesJprovo883 29 08-20-05  10:58 pm
José, Blake, and others discuss crankcase Breathers?José_Quiñones30 06-30-01  10:46 pm
  Start New Thread        

« Previous Next »

Topics | Last Day | Tree View | Search | User List | Help/Instructions | Rules | Program Credits Administration