wheres my power going?
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- Minor Legend
- Posts: 1205
- Joined: Sun Jun 20, 2010 10:43 pm
- Location: Whiteley, Fareham, Hants.
- MMOC Member: No
Re: wheres my power going?
Yes, there is something wrong if you can turn the alternator pulley and not move the belt. Looks like BMC was right!
Re: wheres my power going?
Seems so, now I wonder if its the same size belt with an alternator conversion as standard....
Re: wheres my power going?
![:-?](./images/smilies/icon_confused.gif)
![Whatever :roll:](./images/smilies/icon_rolleyes.gif)
![Image](http://i163.photobucket.com/albums/t282/bmcecosse/80105roy-1-1.jpg)
![Image](http://www.4smileys.com/smileys/flag-smileys/scotland.gif)
![Image](http://alfiethepickup.weebly.com/uploads/1/7/0/3/1703455/246b.gif)
Re: wheres my power going?
Tbh I haven't really done anything so far I wouldn't have done anyway, just cleared up a few earths and found some confusing wires. By christ the wirings bad =( there was a short aswell, as it goes. and tbf I never said you were wrong, I simply wanted to understand why, as it had always been my understanding fanbelt problems became more prevelent at high revs, not low.
Re: wheres my power going?
It's very definitely not right if you can turn the alternator drive pulley..........
![Image](http://i163.photobucket.com/albums/t282/bmcecosse/80105roy-1-1.jpg)
![Image](http://www.4smileys.com/smileys/flag-smileys/scotland.gif)
![Image](http://alfiethepickup.weebly.com/uploads/1/7/0/3/1703455/246b.gif)
Re: wheres my power going?
I figured as much. Weirdly the belt shows no sign of age though, its not freyed at the edges, there's no cracks or smooth glazed sections. I wonder why its slipping....
Re: wheres my power going?
May be wrong section/glazed due to running slack/contaminated with oil/worn grooves in the pulley - or even wrong pulley on the alternator.......
![Image](http://i163.photobucket.com/albums/t282/bmcecosse/80105roy-1-1.jpg)
![Image](http://www.4smileys.com/smileys/flag-smileys/scotland.gif)
![Image](http://alfiethepickup.weebly.com/uploads/1/7/0/3/1703455/246b.gif)
Re: wheres my power going?
I found the belt I needed when I put an alternator on mine was a different size to std. I guess it was down to the different pulley size on the new alternator. The std size belt would not tighten enough.
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- Minor Maniac
- Posts: 7845
- Joined: Thu Jan 25, 2007 3:18 pm
- Location: South East London
- MMOC Member: No
Re: wheres my power going?
If the belt is running at the bottom of the pulley it wont work properly, it needs to be riding in the V section,with the pulley sides and making good contact with the belts sides.
Try and ascertain where wear is taking place, if it's just on the top "corners" of the belt then there isn't enough contact area.
Try and ascertain where wear is taking place, if it's just on the top "corners" of the belt then there isn't enough contact area.
"Once you break something you will see how it was put together"
Re: wheres my power going?
what wer there is does appear to be in those top corners, so would i require a slightly thicker repalcement belt?
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- Minor Friendly
- Posts: 94
- Joined: Sat Mar 13, 2010 5:56 pm
- Location: North-West London
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Re: wheres my power going?
A further thought on 'principles' to bear in mind, relates to belt tension when the engine is stationary. It should be possible to deflect the longest belt run between pulleys, at its middle, by up to half an inch (12mm) max. using a finger.
When the engine is running, centrifugal force will act on the belt, tending to throw it off of its pulleys, thereby reducing the friction and effective drive. So if incorrectly adjusted, they can more easily slip at speed.
When the engine is running, centrifugal force will act on the belt, tending to throw it off of its pulleys, thereby reducing the friction and effective drive. So if incorrectly adjusted, they can more easily slip at speed.
Mike
Thoughts offered as suggestions
Sorry no pics no dig. camera! No Minor, yet. One day..
Thoughts offered as suggestions
Sorry no pics no dig. camera! No Minor, yet. One day..
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- Minor Maniac
- Posts: 7845
- Joined: Thu Jan 25, 2007 3:18 pm
- Location: South East London
- MMOC Member: No
Re: wheres my power going?
A better solution would probably be to get a pulley that matches the others, if that is the cause.would I require a slightly thicker replacement belt?
Any idea what the alternator came off? European cars use metric belts as far as I can tell.
"Once you break something you will see how it was put together"
Re: wheres my power going?
i have no idea what it came off =[ was already fitted when i buaght the car. the belt also slips on the fan blade pulley aswell though so maybe its the wrong belt altogether?
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- Minor Maniac
- Posts: 7845
- Joined: Thu Jan 25, 2007 3:18 pm
- Location: South East London
- MMOC Member: No
Re: wheres my power going?
You can get a belt to suit a Minor with an alternator from the normal suppliers.
As MikeHA4 says the belt shouldn't be bar tight, that just wears the belt and bearings faster than necessary.
As MikeHA4 says the belt shouldn't be bar tight, that just wears the belt and bearings faster than necessary.
"Once you break something you will see how it was put together"