New noise....(coffee grinder?) - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 29 (permalink) Old 12-11-2006, 03:29 PM Thread Starter
 
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Unhappy New noise....(coffee grinder?)

Hey all,

I switched out my coolant this weekend with DexCool, instead of the green stuff, the fluid looked pretty healthy, no white globs or rusty colored stuff.

Anyway after I made sure I had the correct amount of fluid in it I started her up and let her idle with the choke on while sitting on the center stand. I noticed something slightly out of the ordinary. The back wheel, which was off the ground due to the side stand was slowly turning, I thought hmm never noticed that before.
Well I wheeled her out of the garage after this and put the bike on the side stand then I heard this weird noise.

The noise sounded like an intermittent rotating not really grinding but rubbing metal on hard surface noise, not overly loud but there nonetheless. It didn't make the noise constantly only seemingly at an undetermined RPM after revving it a little. This really concerned me b/c I've never heard this noise before. Next I took it around the block never getting above 2nd gear and varied my speed by accelerating and decelerating sometimes quickly other times not but wasn't able to get the bike to make "the noise". Sooooo I got back in the driveway, bike still not showing up to operating temperature, and still very intermittently the noise would re-occur.

I'm thinking that it probably isn't the ACCT because that noise would be constantly occuring upon acceleration and de-celeration right?? And if it were the ACCT wouldn't it sound similar to a loose chain slapping the chain guard on a chain drive bike???

OR is this that "coffee grinder noise" I've been reading about??

Any thoughts???
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post #2 of 29 (permalink) Old 12-11-2006, 03:39 PM
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Noises are so hard to diagnose. ACCT's generally make noise all the time.
The "coffee grinder" noise almost always goes away after the bike has warmed up.

All you did was change the coolant and this started?

Jon

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post #3 of 29 (permalink) Old 12-11-2006, 03:50 PM
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The coffee grinder noise from the clutch usually only happens when letting the clutch out, not while sitting at idle. Can you determine where the noise is coming from? It may be the water impeller or related part as the only thing you did was change antifreeze.

Jim W
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post #4 of 29 (permalink) Old 12-11-2006, 04:09 PM Thread Starter
 
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All I did was change the coolant I swear.

As far as I can tell the noise is coming from the right side of the bike maybe near the righthand footpeg?

When I was changing the fluid I also took out and replaced the top bolt to the radiator plastic cover. Is there any way I could've tightened it too much and now the fan is knocking against it when it kicks on?? I know the fan is on the inside of the radiator but ????
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post #5 of 29 (permalink) Old 12-11-2006, 04:15 PM
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Quote:
Originally Posted by JohnBoy750 View Post
All I did was change the coolant I swear.

As far as I can tell the noise is coming from the right side of the bike maybe near the righthand footpeg?

When I was changing the fluid I also took out and replaced the top bolt to the radiator plastic cover. Is there any way I could've tightened it too much and now the fan is knocking against it when it kicks on?? I know the fan is on the inside of the radiator but ????
The fan is behind the radiator and I doubt it has even come on under those conditions. The plastic cover can not contact the fan.

The area you describe is near the water pump. Are you sure you have all the air out out of the coolant system?

Jon

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Coastered
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Shaved & Jetted
Iridium's
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Battery/Temp/Clock Gauge
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Dunlop D-404's
23,XXX miles and holding pending gasket change (underway!!!)
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post #6 of 29 (permalink) Old 12-11-2006, 04:34 PM Thread Starter
 
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No I'm not sure that all the air is out. I let it run a little to see if the fluid level fluctuated but it didn't. It never got up to operating temperature so maybe that's the issue. Maybe I should let it get up to temp., then let it cool down and THEN check the fluid.

Would this help eliminate the air bubbles???
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post #7 of 29 (permalink) Old 12-11-2006, 04:37 PM
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Quote:
Originally Posted by JohnBoy750 View Post
No I'm not sure that all the air is out. I let it run a little to see if the fluid level fluctuated but it didn't. It never got up to operating temperature so maybe that's the issue. Maybe I should let it get up to temp., then let it cool down and THEN check the fluid.

Would this help eliminate the air bubbles???
There is a bleed screw behind the radiator cap (towards the rear of the bike) that you should open to let the air out while filling.

Jon

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Rick's Stator and R/R
MF AGM Battery
Coastered
Degoated
Shaved & Jetted
Iridium's
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Battery/Temp/Clock Gauge
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Dunlop D-404's
23,XXX miles and holding pending gasket change (underway!!!)
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post #8 of 29 (permalink) Old 12-11-2006, 04:40 PM Thread Starter
 
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Okay ooops didn't know anything about that???

It's located behind the cap (towards the rear) and not part of the actual cap?
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post #9 of 29 (permalink) Old 12-11-2006, 04:59 PM
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It's just behind and above the thermostat
Check here part # 43056
http://www.ronayers.com/fiche/400_02...0&parent=10700

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post #10 of 29 (permalink) Old 12-11-2006, 05:15 PM Thread Starter
 
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Thanks Dianna I'll try to do that tonight.

I'm assuming it's visible without the tank off???
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