|
11-18-2012, 10:20 AM | #1 |
Advanced Member
Join Date: Jun 2012
Location: Las Vegas, NV
Posts: 809
|
Crankcase back pressure?
I recently replaced a Kuryakyn Hypercharger with a Chuckster's air kit. There was one vacuum line to the Hypercharger which I plugged and the larger hose going to the reed valves I capped with the supplied plug. I've noticed a marked decrease in engine noise but also a leak from my oil filler cap. The o-ring is new and the cap is tight so my guess is that it's a high pressure leak. Could I be somehow developing back pressure in my crankcase? Would a breather help? I'm really puzzled by this.
__________________
Las Vegas, Nv VBA #02107 2003 Vulcan Nomad 1500 1980 Yamaha Seca 750 (past) 1969 Kawasaki 350 (past) 1967 Pannonia T8 250 (past) 1971 Honda 100 Twin (past) Login or Register to Remove Ads |
|
11-18-2012, 10:31 AM | #2 |
Sr. Member
Join Date: Mar 2009
Location: Henderson, NV
Posts: 3,746
|
I've noticed this also after high speed interstate driving. It's a thin film streak(s) you can barely see unless the light hits the chrome right. I just wipe it off.
__________________
Oldest Saloon In Nevada http://www.pioneersaloon.info/ "Sin City Stan" Henderson, NV VBA #01004 VROC #29365 2004 Nomad 1500L5 +100 "The Bike" 2009 Nomad 1700 (past) 2004 Vulcan Classic 800 (past) 2010 Cortez - 2011 Crescent City - 2012 Kanab - 2013 Estes Park |
|
11-18-2012, 10:44 AM | #3 |
Advanced Member
Join Date: Jun 2012
Location: Las Vegas, NV
Posts: 809
|
Actually Stan, a few times it sprayed a small pattern on my right pant leg. My leak seems to manifest itself more as rivulets than streaks. Curious.
__________________
Las Vegas, Nv VBA #02107 2003 Vulcan Nomad 1500 1980 Yamaha Seca 750 (past) 1969 Kawasaki 350 (past) 1967 Pannonia T8 250 (past) 1971 Honda 100 Twin (past) |
|
11-18-2012, 01:01 PM | #4 |
Join Date: Jan 2009
Location: Psychiatric Ward FL
Posts: 3,429
|
The crank breathes from the lower front of the engine.
Check that hose. MT
__________________
MT 2016 FLHP Psychiatric Ward FL VBA 936 |
|
11-18-2012, 01:19 PM | #5 |
Advanced Member
Join Date: Jun 2012
Location: Las Vegas, NV
Posts: 809
|
I followed that hose to the nipple on the back of the Chuckster's intake. It seems ok except for a very slight kink where it connects to the intake backing plate, due to the angle. It's not completely kinked, just slightly. Would that be enough to cause the problem?
__________________
Las Vegas, Nv VBA #02107 2003 Vulcan Nomad 1500 1980 Yamaha Seca 750 (past) 1969 Kawasaki 350 (past) 1967 Pannonia T8 250 (past) 1971 Honda 100 Twin (past) Login or Register to Remove Ads |
|
11-19-2012, 07:53 AM | #6 |
VBA Founder
Join Date: Jun 2007
Location: Lindale, Texas
Posts: 6,846
|
You might check out this page. Scroll to the bottom under Crank Case Breather.
http://vulcanbagger.org/tips.htm Inexpensive and works well. I've been using it for several years.
__________________
Robert "Trip" Hilliard VBA/KawaNOW - Founder/Past President VBA # 00001 Trip's Website Custer 09, 18 / Maggie Valley 11 / Eureka Springs 09, 17 / Antlers 09, 10, 11, 13, 15, 16, 17, 18 Texas Hill Country / Deals Gap / Colorado / Wyoming / Montana / Utah / More trips for Trip |
|
11-19-2012, 08:13 AM | #7 |
Sr. Member
Join Date: Mar 2010
Location: Tallahassee FL
Posts: 1,037
|
Are u sure its not oil coming from filter in chucksters intake? That is if u r using an oiled air filter such as K&N.
|
|
11-19-2012, 07:25 PM | #8 | |
Join Date: Apr 2008
Location: (SE Louisiana)
Posts: 8,340
|
Quote:
__________________
2016 Electra Glide Ultra Limited CVO Palladium Silver / Phantom Blue 110 cu in SE 2012 Electra Glide Ultra Limited (Traded 6/22/16) Tequila Sunrise / HD Orange Vance & Hines true dual headers Rinehart 4" slip ons Screamin Eagle Super Tuner Screamin Eagle Stage 1 intake Dyno tuned H.O.G.# 4514015 2007 Nomad 1600 (Traded 6/23/12) VBA #482 |
|
|
11-19-2012, 09:06 PM | #9 |
Sr. Contributor
Join Date: Apr 2008
Location: Tamworth New Hampster 06 1600
Posts: 12,484
|
smbke , If I were you i would get rid of the reed valve bodys with Chucksters Coaster plates, And so get rid of all the hoses and crap with it. Done the way most people do it that leave a vac line from the throttle body plug air tight and tie wrapped to the frame.
That in itself can't be a reason for high crank case pressure, but you do not want any crank case pressure and that breather hose should breath both ways, In and Out. I wouldn't ride until I had run the engine, as was sure that breather hose was breathing in and out. At that i would want the hose off to make sure no mud daubers set up house in that tube.... Wouldn't be the first time i saw something like that.
__________________
06 1600 Nomad Just call me Mac molon labe come and get it |
|
12-03-2012, 11:26 AM | #10 |
Sr. Member
Join Date: Sep 2007
Location: Ft. Mcmurray Ab.
Posts: 1,447
|
Check your oil level..it could be to high and it will enter into your filtler hence drip from there. It will also suck back into the motor which will tarnish your butterflies and affect your idle.
__________________
|
|
12-04-2012, 12:50 AM | #11 |
Advanced Member
Join Date: Jun 2012
Location: Las Vegas, NV
Posts: 809
|
Well, have I got egg on my face! You were right, idhthept! I finally opened my eyes and realized that the oil that was accumulating around the oil filler cap was red! Not engine oil but K/N red filter oil! I took the air filter off and discovered a small pool of oil had accumulated at the bottom of the filter. Apparently at high speed the oil was being blown out of the air filter and back toward the right side case and my right leg. I checked the breather hose in the chucksters intake, Mac. It's breathing just fine ... in and out. Thanks to all for helping me see what was right in front of my face! I appreciate this community.
__________________
Las Vegas, Nv VBA #02107 2003 Vulcan Nomad 1500 1980 Yamaha Seca 750 (past) 1969 Kawasaki 350 (past) 1967 Pannonia T8 250 (past) 1971 Honda 100 Twin (past) |
|
12-04-2012, 08:49 AM | #12 | |
Join Date: Aug 2007
Location: Newmarket Ontario Canada
Posts: 35,387
|
Quote:
__________________
2002 Nomad aka Bountyhunter VBA #27 VROC #18951 |
|
|
12-05-2012, 07:04 AM | #13 | |
Member
Join Date: Apr 2008
Location: Lenoir City, TN
Posts: 417
|
Quote:
|
|
|