Timing Belt info sought

[Yellow Saddle]

In most cases this is very true.

But there are exceptions. Volvo whiteblock motors are every 2nd belt change only. SKF bearings and stainless shafy and impeller, the original is indestructible and failures are so rare as to attract extreme excitement. People think theyre being clever when the get Fred in a Shed to replace the lot with pattern kit, but all theyve done is increase the chances of a failure - if they'd left well alone they'd have been fine.

So do your homework first.

Rare is not nil. SKF bearings fail, shafts fail.

The belt (and its associated components) is a high-risk area and asserting that every failure after a belt was replaced is the mechanic's problem, is not cool. I'm not saying that a belt cannot easilly be installed badly (it is is difficult to screw up) but the expectation that any post-replacement failure should be referred back to the mechanic is problematic for society.

By nature the consumer:
1) Does not understand why they should replace perfectly OK componments
2) Wants to have the lowest bill possible
3) wants to blame someone else for fokapis
4) Doesn't understand the mechanics of causation and association error.

Bottom line: Replace everything that runs on that one crucial belt and thus ensure that your wife doesn't have to rescued from the non-existent emergency lane on the M2 in peak traffic.

 

[fossyant]

SKF bearings are the business, especially for bikes.

 

[Yellow Saddle]

SKF bearings are the business, especially for bikes.

Agreed. Their tolerances and adherance to standards and dimensions is excellent.
But all bearings have a finite life because the lubrication depletes in volume during usage.
It is a half-life scenario that ends in broken cam belts.

6802 does not equal 6802 just bercause the numbers correspond.

 

[fossyant]

Agreed. Their tolerances and adherance to standards and dimensions is excellent.
But all bearings have a finite life because the lubrication depletes in volume during usage.
It is a half-life scenario that ends in broken cam belts.

6802 does not equal 6802 just bercause the numbers correspond.

Unless your username is Silva ?

TBH, I commuted on a fixie with SKF bearings in the hubs with no covers other than the bearing seals. They just worked. I think Mavic used to use SKF, possibly still do, as I've never needed to service their stock wheels ! I have a number in my stable. The hubs outlast the rims for the factory stuff (i.e. special rim/spokes)

 

[fossyant]

I use Enduro bearings on the MTB - hubs etc BB... last OK. Maybe I'll do the BB with SKF to see the difference. GXP Praxis shell, so bearings are replaceable.