Alternator bearing noise

[sierraman]

Bit of a long shot but when the alternator bearings are whirring, is there a way of quietening them down aside from the obvious replacing the alternator.

[Rocket88]

hacksaw through belt?.............................runs...................................seriously, no, not really, although spraying WD40 around in a random fashion may or may not do anything

[sierraman]

Is replacing the actual bearing DIY able on a Ford 1.6 zetec engine?

[Bren]

Don't know about your particular alternator but you can replace bearings - most auto sparks should be able to do it - sometimes they can be a bit difficult to withdraw.

[holbeck]

Is replacing the actual bearing DIY able on a Ford 1.6 zetec engine?

 

Yes, it's possible. you will need access to a press and suitable mandrels. The bearing is a standard automotive roller bearing available from bearing retailers, but not available as a service item from Ford.

 

Ford used a variety of different alternators with the zetec engine, depending on vehicle line or spec,

Escorts were mostly Mitsubishi

Mondeo's   -Bosch. .

Focus early ones were Magneti Marelli and later Denso.

 

Ford (in the 1990's) generally specified all manufacturers to use Koyo bearings in alts supplied to Ford

 

 

For a Mitsubishi type, there are 4 long bolts holding the case together, these can be removed and the case can then be split. The rear half consists of the rear casting, brushbox, regulator / rectifier and stator.

 

The front, has pulley, rotor and front casing including bearing.

The pulley must be removed and the rotor withdrawn from the bearing. The bearing itself is secured behind a thrustplate, once this is removed, the bearing can be pressed out. read the code on the bearing and a factor will be able to supply a replacement.

 

To re-assemble the brushes must be retained in the brushbox to allow for the rotor shaft to be inserted, there's a handy hole in the casing to push a bit of wire through to do this.

 

Job jobbed!

[sierraman]

Checked, the bearing is £22 on ebay, new in box alternator can be had for £40. The brushes are probably worn anyway so make sense replace the unit. Doesn't look too bad a job... Famous last words.

[fordperv]

unicorn tears will sort it

[AlabamaShrimp]

Checked, the bearing is £22 on ebay, new in box alternator can be had for £40. The brushes are probably worn anyway so make sense replace the unit. Doesn't look too bad a job... Famous last words.

This is why some stuff at college is pointless. Last week we took a pat starter motors and this week it was alternators. All that work and arseing about isn't worth it to fix* stuff when it's easy to just buy a new one and save hours