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Floyd1098
PostPosted: Sat Apr 11, 2020 5:23 pm 
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fuzzy-hair-man wrote:
Floyd1098 wrote:
Gunna have to study up on generators and charging systems.

Difficult at the moment but if you can get it to a auto electrician they can spin up alternators (not sure about generators) at least to see if they are behaving themselves, they could probably vary load on it as well, might be a good opportunity while it's off.
Yeah think I'll have to. On the bench it turns smooth and quiet forwards but clicks when turned backwards. I imagine this is normal. I've had a look at the regulator and it was looks clean as a whistle, no burns no corrosion. I'm going to put it back together tomorrow and run the car in the driveway for a while, when it makes the noise, I'll do the screwdriver test and check the battery voltage.
Thanks everyone for your help.

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Hinesy1275
PostPosted: Sat Apr 11, 2020 6:02 pm 
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winabbey wrote:
Hinesy1275 wrote:
Possibly water pump. Check by removing fan belt and turn water pump pulley by hand, checking for any lateral movement. Replace water pump (rather than changing bearing).

Subsequently, the bearing could have allowed excess movement of the shaft to throw it out of alignment and off axis, thereby allowing impeller blades to scrape.

Even just remove the fan belt so water pump and generator are disconnected, start the engine and see if the noise remains or disappears. That will either eliminate or confirm the problem is with one of those two components.

P.S. No water will be circulating so keep and eye on the temperature.


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Floyd1098
PostPosted: Sat Apr 11, 2020 11:07 pm 
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Thanks, I understand the reasoning about taking the fan belt off to identify the sound, I don't think that'll work in this instance. The car stops making the sound when I turn off and restart. So I'd need to run the car on the battery for 30 mins or so to replicate similar conditions, I don't want to cook the motor.
Cheers again for everyone input.

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Floyd1098
PostPosted: Sun Apr 12, 2020 2:22 pm 
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Have the generator on the work bench and it spins with no unusual sounds. So... I took it apart anyway to have alook. The bearing looks OK with some light wear. The shaft end has some scoring I can feel with my thumb nail, the dark band is smooth. Anyway i'm putting it back on now. I'll run it up to temp and let you know the outcome.

Image

Image

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gtogreen1969
PostPosted: Sun Apr 12, 2020 3:22 pm 
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Floyd1098 wrote:
Have the generator on the work bench and it spins with no unusual sounds. So... I took it apart anyway to have alook. The bearing looks OK with some light wear. The shaft end has some scoring I can feel with my thumb nail, the dark band is smooth. Anyway i'm putting it back on now. I'll run it up to temp and let you know the outcome.ImageImage

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What are those dark bands? Looks like the hard chroming has worn away.

Don't forget the piece of felt and a few drops of oil.
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Floyd1098
PostPosted: Sun Apr 12, 2020 3:50 pm 
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Well, I idled Floyd in the driveway for ten minutes, tried the screw driver method... awesome can hear everything! Generator sounds smooth, water pump making water pump sounds. I got carried away listening to clutch and the rockers. Fun! Anyway needing some shopping and beer I went for a spin. 20 minute round trip, not a problem! No noise at all!
Conclusion... Generator end bush must have been dry, I oiled it when I put it back together. It will probably go again so will have it replaced after the lockdown.

Thanks everyone for your help.

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gtogreen1969
PostPosted: Sun Apr 12, 2020 3:55 pm 
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Floyd1098 wrote:
Well, I idled Floyd in the driveway for ten minutes, tried the screw driver method... awesome can hear everything! Generator sounds smooth, water pump making water pump sounds. I got carried away listening to clutch and the rockers. Fun! Anyway needing some shopping and beer I went for a spin. 20 minute round trip, not a problem! No noise at all!
Conclusion... Generator end bush must have been dry, I oiled it when I put it back together. It will probably go again so will have it replaced after the lockdown.

Thanks everyone for your help.

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Thats great. Thanks for the update. Sometimes we don't get to find out what the problem was.
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Floyd1098
PostPosted: Sun Apr 12, 2020 4:21 pm 
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Quote:
What are those dark bands? Looks like the hard chroming has worn away.

Don't forget the piece of felt and a few drops of oil.

Yes I noticed it was dry when I pulled it apart. I think I'll investigate an alternator swap if reconditioning the generator is pricey, also it weighs a ton, alternator must be lighter right?

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