Second Coolant Leak - 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!

 1Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 13 (permalink) Old 05-31-2019, 07:28 PM Thread Starter
Senior Member
 
Jason Pittenger's Avatar
 
Join Date: Apr 2018
Location: Northern Illinois (Not Chicago)
Posts: 239
iTrader: (0)
 
Garage
Second Coolant Leak

I have another coolant leak, and I haven't fixed the first one yet! This one looks a bit more serious. Not in amount, but in location. It looks like the bottom of the cylinder is leaking! Is this fixable? Or should I just keep an eye on coolant levels?
Attached Thumbnails
Click image for larger version

Name:	IMAG0037_1559345164951.jpg
Views:	35
Size:	93.0 KB
ID:	45951   Click image for larger version

Name:	IMAG0036_1559345185180.jpg
Views:	34
Size:	94.3 KB
ID:	45953  


'89 Vulcan 750 Bought 4/12/18 @ 17805.9 miles $800
Purchased stock. Wrecked once
22490.0+ miles

Completed modifications:
Removed mufflers, straight pipes out of GB
110/90 Front Tire
Pick-up coil re-gapped to .020"
Compufire 55402 r/r series regulator
USB Outlet + Voltmeter
Repainted Metallic Blue w/ new tank bages
Ear Shave (wo/ coasters) 40/140 NO shims 45MPG
MCCT conversion

Planned modifications:
Custom LED turn signals
Windshield
Highway Pegs
(Possible) ignition advance
Jason Pittenger is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old 06-01-2019, 03:20 AM
Member
 
Join Date: Mar 2015
Posts: 56
iTrader: (0)
 
The earliest way would be to take the petrol tank off and check all the connections and hoses from the filler cap down the aluminium thermostat housing could spring a leak with age it really is a simple job and not take long if there is nothing obvious connect a temp fual supply and check again with the bike running
water will always find its lowest point so you might have a pool at the bottom of the cylinders but it could be leaking from hose at the top
GDI likes this.

Last edited by trev uk; 06-01-2019 at 03:26 AM.
trev uk is offline  
post #3 of 13 (permalink) Old 06-01-2019, 11:18 PM
Members who have donated towards server costs
 
Join Date: Nov 2007
Location: Chandler, Arizona
Posts: 2,850
iTrader: (0)
 
Yes it could be running down from somewhere else. But if it is the cylinder base gasket, The whole top end will have to come off to fix it. This is an area where the engineers who designed the engine really messed up. The coolant passages are fairly large, and there is almost no gasket material around them. I can see even having a problem installing them without damaging them. They should have used more gasket material around the coolant passages. Don't put any kind of stop leak in the system, it will destroy the water pump mechanical seal.

I am a motorcyclist, NOT a biker.


1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike
VN750Rider/Jerry is offline  
 
post #4 of 13 (permalink) Old 06-02-2019, 09:13 AM Thread Starter
Senior Member
 
Jason Pittenger's Avatar
 
Join Date: Apr 2018
Location: Northern Illinois (Not Chicago)
Posts: 239
iTrader: (0)
 
Garage
That was what I was worried about. No leak stop, huh? Crap.

Well, looks like I'm going to just top it off all the time, till I part with this bike.


'89 Vulcan 750 Bought 4/12/18 @ 17805.9 miles $800
Purchased stock. Wrecked once
22490.0+ miles

Completed modifications:
Removed mufflers, straight pipes out of GB
110/90 Front Tire
Pick-up coil re-gapped to .020"
Compufire 55402 r/r series regulator
USB Outlet + Voltmeter
Repainted Metallic Blue w/ new tank bages
Ear Shave (wo/ coasters) 40/140 NO shims 45MPG
MCCT conversion

Planned modifications:
Custom LED turn signals
Windshield
Highway Pegs
(Possible) ignition advance
Jason Pittenger is offline  
post #5 of 13 (permalink) Old 06-02-2019, 11:20 AM
Member
 
Join Date: Mar 2015
Posts: 56
iTrader: (0)
 
You are making a mountain out of a mole hill the odds on the cylinder base gasket leaking must be 1000/1 it's probably something very simple unless you look you will never know
trev uk is offline  
post #6 of 13 (permalink) Old 06-02-2019, 11:30 AM
Members who have donated towards server costs
 
Join Date: Nov 2007
Location: Chandler, Arizona
Posts: 2,850
iTrader: (0)
 
Actually there have been several cases of base gaskets leaking. Again I believe it is bad design. The gasket surrounding the coolant passages is just not wide enough. However, I don't ever remember hearing about one blowing out. I would clean the engine off, then start it and let it run till the fan comes on, to build up pressure in the system, and see if you can find a coolant leak around the base of the cylinders.

I am a motorcyclist, NOT a biker.


1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike
VN750Rider/Jerry is offline  
post #7 of 13 (permalink) Old 06-02-2019, 02:46 PM
Super Moderator
 
Join Date: Feb 2013
Location: SW Florida
Posts: 2,451
iTrader: (5)
 
I agree with look for the easy problem first.. check the thermostat housing (it does sit above the front cylinder). check the hoses going to it.

I had a leak there after I ear shaved, because I 'disturbed' one of the lines going to the housing. I only needed to remove the hose at the housing, clean off the corrosion from many years of neglect, new o-ring, and no leak

2005 VN750

Sold 11-27-17
michiganteddybear is offline  
post #8 of 13 (permalink) Old 06-02-2019, 04:24 PM
Member
 
Join Date: Mar 2015
Posts: 56
iTrader: (0)
 
It just dawned on me your second leak is probably the first just getting worse
trev uk is offline  
post #9 of 13 (permalink) Old 06-03-2019, 04:03 PM Thread Starter
Senior Member
 
Jason Pittenger's Avatar
 
Join Date: Apr 2018
Location: Northern Illinois (Not Chicago)
Posts: 239
iTrader: (0)
 
Garage
Quote:
Originally Posted by trev uk View Post
It just dawned on me your second leak is probably the first just getting worse
Nah, the first leak is on the back cylinder on the opposite side. I'd be VERY surprised if it found its way around like this.

I'll check over it again carefully, but I didn't see any residue above the gasket location.


'89 Vulcan 750 Bought 4/12/18 @ 17805.9 miles $800
Purchased stock. Wrecked once
22490.0+ miles

Completed modifications:
Removed mufflers, straight pipes out of GB
110/90 Front Tire
Pick-up coil re-gapped to .020"
Compufire 55402 r/r series regulator
USB Outlet + Voltmeter
Repainted Metallic Blue w/ new tank bages
Ear Shave (wo/ coasters) 40/140 NO shims 45MPG
MCCT conversion

Planned modifications:
Custom LED turn signals
Windshield
Highway Pegs
(Possible) ignition advance
Jason Pittenger is offline  
post #10 of 13 (permalink) Old 06-17-2019, 05:25 PM Thread Starter
Senior Member
 
Jason Pittenger's Avatar
 
Join Date: Apr 2018
Location: Northern Illinois (Not Chicago)
Posts: 239
iTrader: (0)
 
Garage
5 more pictures.
Attached Thumbnails
Click image for larger version

Name:	0617191623_1560806660952.jpg
Views:	16
Size:	90.6 KB
ID:	46065   Click image for larger version

Name:	0617191623a_1560806678292.jpg
Views:	16
Size:	90.4 KB
ID:	46067   Click image for larger version

Name:	0617191623b_1560806695497.jpg
Views:	18
Size:	80.7 KB
ID:	46069   Click image for larger version

Name:	0617191623c_1560806707121.jpg
Views:	18
Size:	82.3 KB
ID:	46071   Click image for larger version

Name:	0617191623d_1560806716828.jpg
Views:	17
Size:	80.3 KB
ID:	46073  



'89 Vulcan 750 Bought 4/12/18 @ 17805.9 miles $800
Purchased stock. Wrecked once
22490.0+ miles

Completed modifications:
Removed mufflers, straight pipes out of GB
110/90 Front Tire
Pick-up coil re-gapped to .020"
Compufire 55402 r/r series regulator
USB Outlet + Voltmeter
Repainted Metallic Blue w/ new tank bages
Ear Shave (wo/ coasters) 40/140 NO shims 45MPG
MCCT conversion

Planned modifications:
Custom LED turn signals
Windshield
Highway Pegs
(Possible) ignition advance
Jason Pittenger 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