radiator flush engine flush - Kawasaki Vulcan Forum : Vulcan Forums
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post #1 of 24 (permalink) Old 02-14-2017, 09:58 PM Thread Starter
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radiator flush engine flush

anyone have any info about flushing the cooling system?
have a 99 vulcan 800 and I'm sure its never been done.

two years ago i drained the coolant and put in fresh, but i'm sure it could use a good douche,
like with a caustic cleaner. radiator cap needs replaced, and there is crap in the upper hoses - so I'm
sure the block and radiator itself has to have crap in it. want that out.

last summer hot light came on more often. this is Florida so no surprise, but it's been lighting up a bit more often...

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post #2 of 24 (permalink) Old 02-14-2017, 11:16 PM Thread Starter
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Quote:
Originally Posted by Brewster_440 View Post
anyone have any info about flushing the cooling system?
have a 99 vulcan 800 and I'm sure its never been done.

two years ago i drained the coolant and put in fresh, but i'm sure it could use a good douche,
like with a caustic cleaner. radiator cap needs replaced, and there is crap in the upper hoses - so I'm
sure the block and radiator itself has to have crap in it. want that out.

last summer hot light came on more often. this is Florida so no surprise, but it's been lighting up a bit more often...
found the drain plug. 10mm right side, underneath, near the outer right of the engine.
pulled that out, no fluid flows, hmmmmm
pushed a small screwdriver up the thread holes and viola! water!! like a birth plug. dirty water, cant say its anti-freeze, just dirty rusty water,
ya, need some caustic chemicals inside this engine. maybe a new thermostat.

1964 Yamaha 90cc - hacked up to loose weight and riden in the dirt
1981 Suzuki 450E - bought new
1983 Suzuki 1100ES - bought new
1983 Yamaha Maxim 750 - resurrected from the scrap pile
1999 Vulcan 800 - resurrected from the scrap pile
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post #3 of 24 (permalink) Old 02-15-2017, 12:09 AM Thread Starter
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Quote:
Originally Posted by Brewster_440 View Post
found the drain plug. 10mm right side, underneath, near the outer right of the engine.
pulled that out, no fluid flows, hmmmmm
pushed a small screwdriver up the thread holes and viola! water!! like a birth plug. dirty water, cant say its anti-freeze, just dirty rusty water,
ya, need some caustic chemicals inside this engine. maybe a new thermostat.
Kawasaki wants $50 for a thermostat and gasket.
pulled mine. cleaned it up with simple green.
looks OK, but would still have to boil it up and see if it opens.
not going to replace for 50 bucks.
anyone know a NAPA replacement for ten bucks?
I may just remove it altogether and run without. I dont ride if it's colder than 60 degrees, which these days in Florida is about never....

1964 Yamaha 90cc - hacked up to loose weight and riden in the dirt
1981 Suzuki 450E - bought new
1983 Suzuki 1100ES - bought new
1983 Yamaha Maxim 750 - resurrected from the scrap pile
1999 Vulcan 800 - resurrected from the scrap pile
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post #4 of 24 (permalink) Old 02-15-2017, 04:46 AM
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I did flush my cooling system last summer in a simple and classic way. Just drained the old coolant and flushed with a tap water from (and to) every hole I could find and open. Then I put everything together and filled it with clean distilled water, ran engine couple of times. Drained again, filled again (distilled water) and drained again. After some three or four such cycles I filled it with green (ready to use) aluminum compatible coolant. That's it.

P.S.
Filling up is a little tricky.
If someone needs, there's a video on YouTube how it's done by one of VN800A owners. (It's not me )
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post #5 of 24 (permalink) Old 02-15-2017, 07:07 AM
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What Tehnis said.

Let the water flow out all openings.
These arent cars with heater cores and hard places to get to.
If your running hot AND you know the coolant section has crud, maybe it time for a new radiator?
That is the piece that can plug up with crud and make the engine hot.


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post #6 of 24 (permalink) Old 02-18-2017, 12:21 AM
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Try filling and adding about a quart of distilled vinegar a couple times. Let run until fans comes on, drain and repeat. Do this until water comes out mostly, if not completely clear, then fill with 50/50 antifreeze.

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post #7 of 24 (permalink) Old 02-18-2017, 11:42 AM
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I would not recommend to add any vinegar or any acid type fluid to any aluminum cooling system at all. It's Your decision, but it's mostly because of the way of green coolant works. The green one contains components which have "abilities to cure" microscopic aluminum damages and even repair micro leaks. If You apply vinegar to all system, You risk to rip off that protective layer, even together with some part of system's aluminum oxide, which been there for years! Well, if You still would take risks using vinegar, in worst case, You should wash only the most problematic parts. If it's, for example, radiator, take it off and wash it separately.
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post #8 of 24 (permalink) Old 02-18-2017, 02:03 PM
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i go to the honda car dealership that sells auto parts and buy a jug of type 2 blue 50/50 pre-mix and change it every 2 years or less

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post #9 of 24 (permalink) Old 02-18-2017, 08:10 PM
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Engine ice. Good stuff.

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post #10 of 24 (permalink) Old 02-19-2017, 05:25 AM
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Is it for aluminum engine blocks?
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