Dumped oil, engine clanking - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Engine / Exhaust / Cooling
\ From the radiator, through the case and out
the exhaust. If it has to do with the cooling,
engine or exhaust, discuss it here!

 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 04-18-2012, 08:07 PM Thread Starter
Junior Member
 
Join Date: Apr 2012
Posts: 5
iTrader: (0)
 
Dumped oil, engine clanking

I have a '90 VN750 B2 with 36K on it. Today I was cruising at about 65 mph and I noticed a change in the engine sound. It got louder and sounded like a chain rattling. I pulled over and immediately noticed oil just pouring out of the left lower side of the motor, the clutch housing, along the seam of the case. I shut it off and it dumped all of the oil it had. As I watched the oil stream out of the bike I saw pieces of the gasket falling from the bike too. I have not started it since. Before I crack this thing open, does anyone have any suggestions as to what to look for. It was running beautifully right up until the leak. I had ridden about 30 miles at highway speeds. I am fairly handy with a wrench (adjusted the valves and replaced a timing chain on a KZ750), but I have never worked on this bike other than replacing the final drive last year. Am I going to find terrible things? Any help would be appreciated.
nothreat is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 04-18-2012, 09:36 PM
Old Fart
 
Knifemaker's Avatar
 
Join Date: Jun 2004
Location: Catawissa, MO
Posts: 11,630
iTrader: (4)
     
Garage
The clutch housing is on the right, not the left.

Are you sure the case isn't cracked or broken? Gaskets rarely blow out, but of course can.

If it's the Left side in front of the left footpeg, you might have a fragged balancer....which has been known to blow right through the lower engine case.

Would not try starting it untill you find out what's wrong.

If You Are Not Sure If I Am Joking or Not....I AM !!Photos:
http://www.flickr.com/photos/knifemaker1954/sets/
Knifemaker is offline  
post #3 of 6 (permalink) Old 04-18-2012, 09:39 PM
Linkmeister Supreme
 
OlHossCanada's Avatar
 
Join Date: Aug 2008
Location: Lethbridge, Alberta, Canada
Posts: 7,960
iTrader: (8)
   
Welcome to the Vulcan madness nothreat.

Oil pouring out of the lower left side of the engine case sounds like the balancer gear chewing a hole through the case. The balancer dampers are probably worn out and falling apart. Have you been seeing any rubber chunks in the screen behind the oil drain plug on the lower left side of the engine when doing regular oil changes?

Here is a link to jthills teardown and rebuild of a basketcase engine about 3 years ago, --Part 1--And The Journey Begins.
There are lots of pictures of the broken cam chain, a holed piston and other stuff you don`t want to see in your engine.

There is a picture of the balancer gear in post number 41.
https://www.vn750.com/forum/showthread.php?t=10466
Follow the links to the 2nd and 3rd threads in his series, -The Journey Continues, and The Journey Ends.

Roach made a whole series of videos chronicling his teardown and rebuild too:
https://www.vn750.com/forum/showthread.php?t=18289

This should give you a pretty good idea of what the inside of this engine looks like.

Gordon

1991 VN 750 -"Cosmic Lady" or "Bad Girl"?
Purchased May 16, 2008
Approx.19,300km (12,000 miles)

H-D windshield
Relocated R/R
MF-AGM battery
Fiamm Freeway Blaster horns
F&S luggage rack and engine guard
Kury Offset Hiway pegs
July 13, 2016, Riding on the DARKSIDE now, Classic Radial 165/80-15


TOP TEN THINGS A NEW RIDER/OWNER SHOULD DO. Click on link.
https://www.vn750.com/forum/11-vn750-general-discussion/9127-top-ten-items-you-would-suggest-new-owner-do-his-new-ride.html
OlHossCanada is offline  
 
post #4 of 6 (permalink) Old 04-27-2012, 10:40 PM Thread Starter
Junior Member
 
Join Date: Apr 2012
Posts: 5
iTrader: (0)
 
Got the bike home and looked at it more carefully. I think the balancer is the problem. Based upon your suggestion, the grinding sound, looking at the videos, the metal flakes mixed in the oil on the case, and the crack in the case that has to be the problem. The case has a crack in it to the right of the gasket seam. It is not wide open, but is cracked. My manual says I have to pull the engine. Is this as big a job as I think it will be? I am pretty sure I am not a good enough wrench or have the tools to tear the engine down. I also imagine the right balancer should be checked and replaced too. This is a 1990 with 36K on it. Is it worth fixing if I have to have it done?
nothreat is offline  
post #5 of 6 (permalink) Old 04-27-2012, 11:03 PM
Sparky!!!
 
slimvulcanrider's Avatar
 
Join Date: May 2008
Posts: 8,695
iTrader: (3)
   
Garage
There is a basket case part out going on.. see if he has the engine... and ask him what is wrong with the engine... It would be worth it, if you can find the parts used. and you pulled the engine your self. if you have a few wrenches and sockets, a cross tip and flat blade screw driver you should have enough tools to pull the engine... ohh and a milk crate.
slimvulcanrider is offline  
post #6 of 6 (permalink) Old 04-28-2012, 01:18 PM
Linkmeister Supreme
 
OlHossCanada's Avatar
 
Join Date: Aug 2008
Location: Lethbridge, Alberta, Canada
Posts: 7,960
iTrader: (8)
   
Quote:
Originally Posted by nothreat View Post
Got the bike home and looked at it more carefully. I think the balancer is the problem. Based upon your suggestion, the grinding sound, looking at the videos, the metal flakes mixed in the oil on the case, and the crack in the case that has to be the problem. The case has a crack in it to the right of the gasket seam. It is not wide open, but is cracked. My manual says I have to pull the engine. Is this as big a job as I think it will be? I am pretty sure I am not a good enough wrench or have the tools to tear the engine down. I also imagine the right balancer should be checked and replaced too. This is a 1990 with 36K on it. Is it worth fixing if I have to have it done?
The right balancer does not have the rubber and plastic dampers in it, so seldom needs maintenance or replacement.
See diagram in link:

http://www.cheapcycleparts.com/model...225-crankshaft

Gordon

1991 VN 750 -"Cosmic Lady" or "Bad Girl"?
Purchased May 16, 2008
Approx.19,300km (12,000 miles)

H-D windshield
Relocated R/R
MF-AGM battery
Fiamm Freeway Blaster horns
F&S luggage rack and engine guard
Kury Offset Hiway pegs
July 13, 2016, Riding on the DARKSIDE now, Classic Radial 165/80-15


TOP TEN THINGS A NEW RIDER/OWNER SHOULD DO. Click on link.
https://www.vn750.com/forum/showthread.php?t=9127
OlHossCanada is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Once registered, your User Name"cannot be changed". We can make exceptions within 7 days, but after that, it is set in stone.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome