Thread: EC SC pulley - noise when engine cool
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Old Feb 27, 2012 | 11:09 PM
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onehundred80
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Default Re: EC SC pulley - noise when engine cool
Originally Posted by bhahlbeck
From reading this, this is not really a DIY job then?
On the contrary, the install should be a piece of cake.

Reverse engineering has its problems. For instance if you measured the bore where the bearing is fitted and used that as the diameter for your copy you could make a mistake. The true bore size is obtained from the bearing manual which gives the specific sizes that the bore should be. You cannot take the size of your sample and add a thou or so and call that good enough, as you may have the largest bore size for that bearing and you will make yours all mostly bigger than it should be. You could of course end up with bores too small which would make the bearing too tight which would reduce the inside diameter where the ***** are and reduce the clearance needed for them to roll smoothly. This would cut the life of the bearing greatly and you would not know why that happened. The fit on the SC shaft would not be affected and they should all have no problem there as the SC shaft would be made to the correct size with the correct tolerance to fit the bearing correctly. This would be true as long as the bearing is the same class as the shaft was made to fit.

These parts are not a piece of cake to make and may be beyond the skills of some machine shops. The spring is quite tricky and the rivet fit should be identical to the OEM ones, that may require that there be some play on the rivets to allow for some tolerance build ups and prevent binding on the fixed pins.

I see some people are getting defensive with regard to the seller, if I had coughed up $550 or so I might be a bit pi ssed of by now and be demanding answers instead of puffing smoke. If there is a problem or a perceived problem it is best to be up front about it. Companies that did this in the past have weathered the storm and come through it with a better name. While others have done the opposite to their detriment.
 
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