Grinding noise


Information and questions on GL1500 Goldwings (1988-2000)
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aurora
Posts: 12
Joined: Wed May 19, 2010 12:26 am
Location: Sacramento, Ca
Motorcycle: 1999 GL1500 SE

Grinding noise

Postby aurora » Wed Sep 05, 2012 2:13 pm



1999 1500. with 266,000. When unit idles it runs fine throttle response is fine. when under load and in gear there comes a grinding noise from down below right after take off and moving. It isnt steady, just for a few moments and then stops.. it will do this in different gears but not at hwy speeds. It almost sounds as if the starter on the unit didnt disengaged and is dragging at times.. local shop is stumped. The rear drive was replaced about 30,000 ago had been serviced since then. all levels are good and serviced on time. any ideas



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virgilmobile
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Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
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81 GL1100
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83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Grinding noise

Postby virgilmobile » Wed Sep 05, 2012 2:44 pm

It's difficult from here to tell,can you identify if the noise is predominantly on the left or right side?
The left side may be the rubber bushings that couple the alternator to the engine.
The right side.....well almost anything that turns from the wheel into the engine.
Can you center stand it safely and produce the noise where you can locate it's origin?

aurora
Posts: 12
Joined: Wed May 19, 2010 12:26 am
Location: Sacramento, Ca
Motorcycle: 1999 GL1500 SE

Re: Grinding noise

Postby aurora » Wed Sep 05, 2012 8:31 pm

I put it on the center stand, Put it in Netural and started it and the noise started right up for about 4 to 5 seconds.. then stopped.. I gently gave it some throttle and nothing.. no noise at all.. I shut it down. did the same thing over again but this time there was no noise.. Its hard to say where the noise is coming from but it seems like the left side as your sitting on it.. I checked the alt and it it is secure. Did you ever step on your brake pedal on your car and feel/hear metal to metal? thats what it sounds like..So originaly I thought it was only doing this under load but now I know its not. So I am not thinking its the tranny or final drive. Maybe the clutch? Starter pinion? I just dont know..

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virgilmobile
Posts: 7656
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Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Grinding noise

Postby virgilmobile » Thu Sep 06, 2012 6:52 am

Left side huh.I,m gonna guess here on this one.Front bearing in the alternator is giving up.
Told ya I was gonna guess.
Let's assume you can make it make the noise every time you cold start the bike...
Remove the alternator,if you tape off the big wire so it won't spark to ground,you can run the engine with it removed.
Test it again.At least this will eliminate anything external from the innards of the engine.
The noise you describe sounds like a dried up bearing that's grinding a bit till it's forced to spin.
Take loose the battery connection and remove the alternator,tape the wire up and reconnect the battery .test again and also hand spin the alternator.I'm hoping the bearing feels rough.
Also remember,there's a bearing in the front too.the timing belt idlers.

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dingdong
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Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: Grinding noise

Postby dingdong » Thu Sep 06, 2012 7:08 am

I'm guessing the alt. also When mine started making a noise it was the rear bearing. Both are easy to change out. Take a large long screwdriver and hold it against the alt. with the handle at your ear. If not there, probe around with it. The noises will scare you but will determine where the noise is coming from.
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

aurora
Posts: 12
Joined: Wed May 19, 2010 12:26 am
Location: Sacramento, Ca
Motorcycle: 1999 GL1500 SE

Re: Grinding noise

Postby aurora » Thu Sep 06, 2012 1:43 pm

Well I think i have it solved. Cold start up. put my hand on the alt and I can feel it rumble right through the housing. feels like a bunch of marbles running /turning around in there.. I want to thank those that replied for your suggestion and help as now I know what to do to fix it and wont be at the mercy of a dealer or shop..This seems to be an original alt as a replacement doesnt have the little tube /cylinder like part that attaches to it.. I will take it apart and see what there is to be replaced and go from there. and if not i will search for something that will work.. thanks again for the help...

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virgilmobile
Posts: 7656
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Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
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82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Grinding noise

Postby virgilmobile » Thu Sep 06, 2012 4:29 pm

See..we are psychic. :D or is it psychotic ;) .

aurora
Posts: 12
Joined: Wed May 19, 2010 12:26 am
Location: Sacramento, Ca
Motorcycle: 1999 GL1500 SE

Re: Grinding noise

Postby aurora » Thu Sep 06, 2012 7:25 pm

lol, whatever it is, it works..Now to find a Alt that doesnt cost 250.00 to$300.00. Is there any off the shelf exchange from any auto houses that you might know of? Even the salvage yards here want 200.00 for one and I wont put one in if doesnt have real low miles on it.. I ride to much for this to go down on me.. To have it rebuilt cost $185.00 and thats a full rebuild.. any ideas?

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virgilmobile
Posts: 7656
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Grinding noise

Postby virgilmobile » Thu Sep 06, 2012 7:32 pm

Why not fix it yourself?Your only looking at bearings and brushes at the most.it still works electrically,just bad bearings.
How bout a local car alternator repair shop.The only difference is the coupler on the front of it.

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redial
Posts: 1993
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Location: Kapunda, SouthAustralia
Motorcycle: 1997 GL1500 Spectre Red Aspencade

Re: Grinding noise

Postby redial » Thu Sep 06, 2012 8:02 pm

Again I mention Hemi-roid, who is now on this site from time to time, - that is what he does! Reburishes alternators and brings them back. Check the site out and see if there is a solution there for you.
Len in Kapunda

The world is not going to finish today, as it is already tomorrow in Australia and New Zealand, and other islands of foreign nations such as Guam and Samoa.

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dingdong
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Motorcycle: 1976 gl1000
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Re: Grinding noise

Postby dingdong » Fri Sep 07, 2012 6:56 am

Whatever you decide also get a new set of dampener rubber bumpers. They will be hard and need replacement.
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

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Ericson38
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Location: Nokesville, Va
Motorcycle: 1983 GL 1100 Standard, 2000 GL1500 SE

Re: Grinding noise

Postby Ericson38 » Thu Sep 20, 2012 7:15 pm

You have big time miles there....my hats off to you.

I bought a new Honda rotor at the dealer for 156.00, which comes with the front frame and front bearing pre-assembled. I also bought the rear bearing; came close to 200.00 when adding the drive rubber dampers.

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Kiwi2
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Motorcycle: 1988 GL 1500/6
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Re: Grinding noise

Postby Kiwi2 » Mon Sep 24, 2012 4:39 pm

aurora wrote:lol, whatever it is, it works..Now to find a Alt that doesnt cost 250.00 to$300.00. Is there any off the shelf exchange from any auto houses that you might know of? Even the salvage yards here want 200.00 for one and I wont put one in if doesnt have real low miles on it.. I ride to much for this to go down on me.. To have it rebuilt cost $185.00 and thats a full rebuild.. any ideas?


Can you let us all know what you did?




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