1982 900 crankshaft pulley source?

"Grunff" <grunff DeleteThis @ixxa.com> wrote in message
news:42e48595$0$27745$db0fefd9@news.zen.co.uk...
> Jim Babcock wrote:
> > Mine is dying, but I can't seem to find a source on-line. Does anyone
know
> > of a source of these pulleys.
>
> Yes, there's a guy down the road from me who sells them.
>
>
> --
> Grunff

How does one know when these are going bad? Is it something I can check
*before* it happens?
 >> Stay informed about: 1982 900 crankshaft pulley source? 

James Sweet wrote:

> How does one know when these are going bad? Is it something I can check
> *before* it happens?

The crank pulley, or harmonic balancer, consists of two pieces of steel
- an inner disk and an outer ring - with a rubber band sandwitched
between them.

As the rubber ages, it is no longer capable of transmitting full torque
to the outer ring, so you get slippage between inner disk (driven by the
crankshaft) and outer ring (which drives the belts).

The symptoms usually start with a squeal on startup, and on revving etc.
Similar to belt squeal. This gradually gets worse, until the pulley
eventially comes apart.

A good way to keep an eye on it: using white marker, draw a couple of
lines on the outer surface of the pulley (the face you can see), running
from the center to the outer edge. These lines cross the rubber band. If
you ever get slippage, the lines will no longer line up. A quick glance
at the pulley at service time will tell you if there's been any slippage.


--
Grunff
 >> Stay informed about: 1982 900 crankshaft pulley source? 

>
> The crank pulley, or harmonic balancer, consists of two pieces of steel
> - an inner disk and an outer ring - with a rubber band sandwitched
> between them.
>
> As the rubber ages, it is no longer capable of transmitting full torque
> to the outer ring, so you get slippage between inner disk (driven by the
> crankshaft) and outer ring (which drives the belts).
>
> The symptoms usually start with a squeal on startup, and on revving etc.
> Similar to belt squeal. This gradually gets worse, until the pulley
> eventially comes apart.
>
> A good way to keep an eye on it: using white marker, draw a couple of
> lines on the outer surface of the pulley (the face you can see), running
> from the center to the outer edge. These lines cross the rubber band. If
> you ever get slippage, the lines will no longer line up. A quick glance
> at the pulley at service time will tell you if there's been any slippage.
>
>


Ah, that makes sense, didn't realize the belts were driven through the
harmonic ballancer.
 >> Stay informed about: 1982 900 crankshaft pulley source? 

James Sweet wrote:
>>The crank pulley, or harmonic balancer, consists of two pieces of steel
>>- an inner disk and an outer ring - with a rubber band sandwitched
>>between them.
>>
>>As the rubber ages, it is no longer capable of transmitting full torque
>>to the outer ring, so you get slippage between inner disk (driven by the
>>crankshaft) and outer ring (which drives the belts).
>>
>>The symptoms usually start with a squeal on startup, and on revving etc.
>>Similar to belt squeal. This gradually gets worse, until the pulley
>>eventially comes apart.
>>
>>A good way to keep an eye on it: using white marker, draw a couple of
>>lines on the outer surface of the pulley (the face you can see), running
>>from the center to the outer edge. These lines cross the rubber band. If
>>you ever get slippage, the lines will no longer line up. A quick glance
>>at the pulley at service time will tell you if there's been any slippage.
>>
>>
>
>
>
> Ah, that makes sense, didn't realize the belts were driven through the
> harmonic ballancer.
>
>


As versus what? AFAIK all belt drives come off the harmonic balancer...

-Fred W
 >> Stay informed about: 1982 900 crankshaft pulley source? 

"Malt_Hound" <Malt_Hound@*spam*yahoo.com> wrote in message
news:EL-dnXddBNzz7HrfRVn-hQ@adelphia.com...
> James Sweet wrote:
> >>The crank pulley, or harmonic balancer, consists of two pieces of steel
> >>- an inner disk and an outer ring - with a rubber band sandwitched
> >>between them.
> >>
> >>As the rubber ages, it is no longer capable of transmitting full torque
> >>to the outer ring, so you get slippage between inner disk (driven by the
> >>crankshaft) and outer ring (which drives the belts).
> >>
> >>The symptoms usually start with a squeal on startup, and on revving etc.
> >>Similar to belt squeal. This gradually gets worse, until the pulley
> >>eventially comes apart.
> >>
> >>A good way to keep an eye on it: using white marker, draw a couple of
> >>lines on the outer surface of the pulley (the face you can see), running
> >>from the center to the outer edge. These lines cross the rubber band. If
> >>you ever get slippage, the lines will no longer line up. A quick glance
> >>at the pulley at service time will tell you if there's been any
slippage.
> >>
> >>
> >
> >
> >
> > Ah, that makes sense, didn't realize the belts were driven through the
> > harmonic ballancer.
> >
> >
>
>
> As versus what? AFAIK all belt drives come off the harmonic balancer...
>
> -Fred W

I never paid much attention, haven't had one break but I just assumed the
pully was driven off the center portion and the weighted part of the
balancer wasn't connected to anything. I've only ever dealt with that part
on Volvos though.
 >> Stay informed about: 1982 900 crankshaft pulley source?