Freeze plug location?? help... - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 15 (permalink) Old 12-11-2013, 07:33 PM Thread Starter
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Freeze plug location?? help...

Hello, i have never been registered to a forum before, but figured it was about time. i've never posted, but am in need of assistance. I'm helping to restore my dad's old 1985 kawasaki vulcan, vn700, and he mentioned that there was a freeze plug out.. i've searched my service manual, and nowhere does it mention freeze plug, expansion plug, crank case plug, engine block plug, etc.. does anyone know of a website or link to a diagram that shows the location of the freeze plugs?? any help would be appreciated. Thanks!
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post #2 of 15 (permalink) Old 12-11-2013, 10:40 PM
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Quote:
Originally Posted by 1985vn700 View Post
Hello, i have never been registered to a forum before, but figured it was about time. i've never posted, but am in need of assistance. I'm helping to restore my dad's old 1985 kawasaki vulcan, vn700, and he mentioned that there was a freeze plug out.. i've searched my service manual, and nowhere does it mention freeze plug, expansion plug, crank case plug, engine block plug, etc.. does anyone know of a website or link to a diagram that shows the location of the freeze plugs?? any help would be appreciated. Thanks!
Hi, and Welcome.
I do not know of any freeze plugs on the 750....doubt the 700 has one either.

I suspect he might be viewing a hole which is missing a pipe or hose attachment.
Where exactly on the engine is this problem/issue ?

WiliiamTech

'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #3 of 15 (permalink) Old 12-11-2013, 10:50 PM
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After your total posts reach (I think) 5, you will be allowed to post pics.

.....post a couple pics of the problem area.


'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #4 of 15 (permalink) Old 12-12-2013, 01:00 AM
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There are no freeze plugs but there is a bleeder screw on each head they are located near the bottom of each head front head has a 10mm screw on the right side of the bike and the rear head has the same screw on the left side

But if your dad is anything like mine he might just be pulling your chain

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post #5 of 15 (permalink) Old 12-12-2013, 04:47 PM Thread Starter
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Hi, and Welcome.
I do not know of any freeze plugs on the 750....doubt the 700 has one either.

I suspect he might be viewing a hole which is missing a pipe or hose attachment.
Where exactly on the engine is this problem/issue ?

WiliiamTech
Wow thanks to all of you for replying! The hole is right behind the forward controls for the rear brake foot peg area.. any thoughts?

Last edited by 1985vn700; 12-12-2013 at 05:05 PM.
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post #6 of 15 (permalink) Old 12-12-2013, 04:56 PM Thread Starter
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Quote:
Originally Posted by WilliamTech View Post
After your total posts reach (I think) 5, you will be allowed to post pics.

.....post a couple pics of the problem area.

not sure if i did it right, but i'm attempting to upload two pics.. any thoughts as to what the hole is? it's right behind the forward controls/brake pedal board area..
Attached Thumbnails
Click image for larger version

Name:	hole in bike.jpg
Views:	78
Size:	24.7 KB
ID:	12106   Click image for larger version

Name:	hole in bike 2.jpg
Views:	70
Size:	28.3 KB
ID:	12114  

Last edited by 1985vn700; 12-12-2013 at 05:05 PM.
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post #7 of 15 (permalink) Old 12-12-2013, 05:10 PM
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That looks to be a plug right where the water pump impeller is. Just might be a freeze plug. I will have to go look at mine and some parts schematics to verify.

87 vn750at least that is what the frame #'s say
"Squirrel Bike" aka Jersey

Rat bike with a good PR agent

shaved and coastered
2 into 1 exhaust
rear 170 and front 110
Relocated R/R
custom dash with voltmeter
Spitfire windscreen
Plutonium plugs
Recovered seat without "butt hammers"
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post #8 of 15 (permalink) Old 12-12-2013, 05:27 PM Thread Starter
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That looks to be a plug right where the water pump impeller is. Just might be a freeze plug. I will have to go look at mine and some parts schematics to verify.
Right on! any help is appreciated! Thanks!
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post #9 of 15 (permalink) Old 12-12-2013, 09:46 PM
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Not on any schematics I can find. And I haven't been out to my bike to verify. I have a spare cover out in storage I could look at as well. Might be a few days before I get out there but you might end up changing out that cover, which isn't too difficult.

87 vn750at least that is what the frame #'s say
"Squirrel Bike" aka Jersey

Rat bike with a good PR agent

shaved and coastered
2 into 1 exhaust
rear 170 and front 110
Relocated R/R
custom dash with voltmeter
Spitfire windscreen
Plutonium plugs
Recovered seat without "butt hammers"
More to come
Praise to the Parts Goddess Crobins for needed things

When someone tells me "Great minds think alike" all I can think is "You Pervert"
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post #10 of 15 (permalink) Old 12-20-2013, 05:00 PM
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My '02 has what appears to be a plug there too. I never noticed it before because it is covered by the footpeg bracket. It is directly above the coolant drain screw on the bottom of the engine, which means it is over the water pump. I could not find it on any schematic either, which probably means it is a permanent part of the engine cover, and not replaceable. I have never had the cover off on mine, so I don't know what is behind it. There are probably pictures on here somewhere showing the back side of that cover. It's possible it could be welded shut, or replaced with another plug, if not you would need to replace the entire right side cover.


IMO, there is no such thing as a "freeze" plug. They are correctly called "core plugs" The only reason they are there (at least on automotive engines) is to fill the holes left from casting the coolant passages in the block. Some racing blocks have them welded shut. They are a major problem on car engines, because they are prone to corrosion, and because of where most of them are located, you have to pull the engine or transmission to replace them. I have seen many blocks cracked from freezing, and never once saw a core plug pushed out. Some people think they were put there on purpose, to protect the block against damage from frozen coolant expanding. But that is not actually the case.

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
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