Replacing all cooling system hoses - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 12 (permalink) Old 05-18-2016, 04:01 PM Thread Starter
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Question Replacing all cooling system hoses

I am curious if anyone has replaced all of the cooling system hoses before. I know on my cars/trucks I'd replace the hoses every 5 years or so just for giggles. This thing has quite a number of rubber hoses in the overall cooling system and I'm curious as to if anyone has done an all-out swap yet as a regular maintenance thing, not just during times of entire engine removal, etc. My immediate goal is to drain and flush my system the next weekend we have decent weather and I am wondering if it's better to wait until I have all the rubber on-hand and then do the flushing and replacing of the coolant. Note: I have not seen any issues with leaks nor with the only visible hose (the lower radiator hose) but my natural urge is to change everything. Is this sort of project on anyone's regular maintenance things-to-do list? Am I correct that this would entail removing the air box under the fuel tank?

TOC MCCTs
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LED turn signals, brake lights and running lights
LED license plate frame
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National Cycles Low Boy Heavy Duty windshield
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Custom seat (made by a local guy)
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post #2 of 12 (permalink) Old 05-18-2016, 11:08 PM
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The one under the seat running parallel to the airbox is the one that'll soften up from the heat the most and get you every time. Since it's the easiest to forget (out of sight, out of mind) that's the one that gives the most trouble. Also by far the longest, so it is more prone to fail. I'd replace that before ANY hose if doing it selectively.
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post #3 of 12 (permalink) Old 05-18-2016, 11:44 PM
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Quote:
Originally Posted by One1 View Post
The one under the seat running parallel to the airbox is the one that'll soften up from the heat the most and get you every time. Since it's the easiest to forget (out of sight, out of mind) that's the one that gives the most trouble. Also by far the longest, so it is more prone to fail. I'd replace that before ANY hose if doing it selectively.
Good advice One1. Most of my driving is local so I have never been one to change out hoses before they started to leak on my cages.

That strategy has only bitten me in the @$$ once, but it is harder to carry a jug of extra coolant on the scoot.
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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.
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post #4 of 12 (permalink) Old 05-19-2016, 01:16 AM Thread Starter
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Replacing them all will cost some cash. I still might do it, almost assuredly will in fact, just because they're 10 years old (mine is an '06 model). I asked because I don't remember seeing a thread on this subject. I may as well change out the thermostat, too, while getting this deep into it. I'm not having any troubles with it, they're just old.

TOC MCCTs
Saddlebags, hard mounted
Fork mounted tool bag (now hard mounted)
Relocated rear turn signals
LED turn signals, brake lights and running lights
LED license plate frame
Engine Guard and Highway pegs
National Cycles Low Boy Heavy Duty windshield
Home made lowers (nice)
Custom seat (made by a local guy)
Iridium plugs (DPR7EIX-9)
Shenko 230 Tour Master tires at 11,123 miles
Splines lubed at 11,123 miles
Luggage rack
Light bar with LED lights
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post #5 of 12 (permalink) Old 05-19-2016, 10:27 AM
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Quote:
Originally Posted by Chris and Shim View Post
Replacing them all will cost some cash. I still might do it, almost assuredly will in fact, just because they're 10 years old (mine is an '06 model). I asked because I don't remember seeing a thread on this subject. I may as well change out the thermostat, too, while getting this deep into it. I'm not having any troubles with it, they're just old.
Preventive Maintenance is always a good approach.........

But be aware the saying..... "Don't Fix What Ain't Broke"

- -

'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 #6 of 12 (permalink) Old 05-20-2016, 06:53 PM
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This one right here...
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2005 Vulcan VN750 (silver)
(2) 1994 Vulcan VN750 (red)

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post #7 of 12 (permalink) Old 05-20-2016, 09:14 PM Thread Starter
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I've ordered all the hoses and the thermostat. Sometime early June when the weather is nice on a weekend is when I'll tackle it.
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TOC MCCTs
Saddlebags, hard mounted
Fork mounted tool bag (now hard mounted)
Relocated rear turn signals
LED turn signals, brake lights and running lights
LED license plate frame
Engine Guard and Highway pegs
National Cycles Low Boy Heavy Duty windshield
Home made lowers (nice)
Custom seat (made by a local guy)
Iridium plugs (DPR7EIX-9)
Shenko 230 Tour Master tires at 11,123 miles
Splines lubed at 11,123 miles
Luggage rack
Light bar with LED lights
Chris and Shim is offline  
post #8 of 12 (permalink) Old 05-20-2016, 11:17 PM
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This thread has got me thinking that I should at least look at the hoses on my motor's cooling system and squeeze them to determine if they feel old, hard and brittle, or soft, weak and ballooning out or not.

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
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post #9 of 12 (permalink) Old 05-28-2016, 12:04 AM Thread Starter
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Got most of the hoses in today. Its my fault they all didn't come in because I failed to originally order one. I didn't realize that until several days later so I suppose that one will come in next week. Then I'll tackle the drain/flush/rinse/hose-replacement project. What I DID do today was pull the overflow tank and look at what's inside. The coolant was amazingly like-new green yet there's a lot of white chunks in it. I took a picture of it but until I figure out Windows 10 I can't upload any pics right now. I have enough vinegar and distilled water to flush/rinse twice if need be. I'm looking forward to jumping into this.

TOC MCCTs
Saddlebags, hard mounted
Fork mounted tool bag (now hard mounted)
Relocated rear turn signals
LED turn signals, brake lights and running lights
LED license plate frame
Engine Guard and Highway pegs
National Cycles Low Boy Heavy Duty windshield
Home made lowers (nice)
Custom seat (made by a local guy)
Iridium plugs (DPR7EIX-9)
Shenko 230 Tour Master tires at 11,123 miles
Splines lubed at 11,123 miles
Luggage rack
Light bar with LED lights
Chris and Shim is offline  
post #10 of 12 (permalink) Old 05-28-2016, 03:44 AM
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Quote:
Originally Posted by Chris and Shim View Post
Got most of the hoses in today. Its my fault they all didn't come in because I failed to originally order one. I didn't realize that until several days later so I suppose that one will come in next week. Then I'll tackle the drain/flush/rinse/hose-replacement project. What I DID do today was pull the overflow tank and look at what's inside. The coolant was amazingly like-new green yet there's a lot of white chunks in it. I took a picture of it but until I figure out Windows 10 I can't upload any pics right now. I have enough vinegar and distilled water to flush/rinse twice if need be. I'm looking forward to jumping into this.
Planning on doing this myself, good luck with the refit

Man can not live by bread alone... he needs Duct tape & WD40
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