Coolant issue - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 5 (permalink) Old 10-03-2017, 05:45 PM Thread Starter
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Coolant issue

90 Vulcan 750. Bike over heats yet gauge reads normal. Steam and coolant escape from cap. Replaced radiator cap and had system flushed professionally. Is it the thermostat or pump?
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post #2 of 5 (permalink) Old 10-03-2017, 08:58 PM
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Best hope is the thermostat stuck closed. I would take it out and boil it in water to see if it opens.

If the t-stat opens, I would want to see if the coolant circulates in the radiator. I'd probably leave the t-stat out and start it up, then check the radiator.

This system always needs bled any time the coolant is drained or has been really low.

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post #3 of 5 (permalink) Old 10-04-2017, 05:14 PM Thread Starter
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Thanks!
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post #4 of 5 (permalink) Old 10-05-2017, 01:08 AM
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You're welcome. Stop at the newbie intro section and tell us about you and your ride.

Weird, he's got two posts in this thread, post count still says 1.

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post #5 of 5 (permalink) Old 10-05-2017, 03:36 PM
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Quote:
Originally Posted by Ed DeBlecourt View Post
90 Vulcan 750. Bike over heats yet gauge reads normal. Steam and coolant escape from cap. Replaced radiator cap and had system flushed professionally. Is it the thermostat or pump?
I am not sure as to your meaning that you had the system flushed "professionally" as I would expect any paid mechanic working on a coolant system would change the thermostat even if it was working just to be able to add to the billing process. Besides it is a simple procedure for a "professional" or anyone else with simple tools. Also, have your setup checked as you have at least two posting under this thread and yet are listed as only having one. The count doesn't matter much but maybe some of your postings are not making it onto the forum for membership responses. You can also try a post under the Newbie Check-In to let us know your riding/wrenching experience if you so desire. Most members do so. Good luck and try the boiling procedure that was described already.

and always remember, "Ride until you rot!"
**Really not sure if the Big "C" is back right now
but having to face the fact that this is a lifetime routine
going forward. Five operations done and it still continues.

Tom
Vulcan 2000
New ride: 2009 Victory Vision Arlen Ness Signature Series
4507 miles
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