<VV> NOS Pilot bushing wanted

[kevin nash]

Hi Carlton-
I now understand your point of view, that the most recent batch of pilot bushings 
might be causing your problem. You might want to inform "the vendor" of your findings-
It is entirely possible that they mistakenly ordered alloy 932, which is "bearing bronze"
but is non porous, and has no oil in it. The 2 other mistaken possiblities are SAE 863 (aka Super Oilite)
- this is the one that a magnet will stick to ( therefore dont use), and Alloy 954, which is
also non-porous.
 
The correct material is SAE 841, which is also refered to as Oilite. If the bushing that you bought
had no pores in it, it not Oilite, and if it has pores in it, but a magnet will stick to it, it is Oilite, but
the composition is wrong for the application (Im guessing it doesnt work because its too hard, and
leaves the input shaft too loose after installing). Because the correct material is common and 
widely available (McMaster Carr carries these bushings in all common sizes), Its entirely possible
that there was an ordering mistake by the vendor. By the way, SAE 841 bushings from McMaster Carr
cost apx $ 5.00, at a size close to the Corvair pilot bushing size. 
Kevin Nash 
 
> From: carlton55 at comcast.net
> To: wrokit at hotmail.com
> Subject: RE: <VV> NOS Pilot bushing wanted
> Date: Mon, 6 Jun 2011 08:46:14 -0400
> 
> Hi Kevin,
> 
> Well this sort of experience is what I like to hear. I will certainly look
> into the worn or bent input shaft thought. 
> 
> The only thing is that I bought my bushing from Clarks and it is not at all
> what I remembered Oilite to be like. These are a bright bronze color. Not
> like the old Oilite bushings that were dark colored with fine blackish
> flecks all over it. Our local club professional Corvair mechanic is who did
> the installation who has done lots of clutch jobs over the years. He soaked
> the bushing in oil over night before installation. I would have hoped he
> would of noticed a bent shaft. However, he did another clutch job for
> another club member a few weeks later and had the same thing happen,
> screeching bushing.
> 
> You might find it interesting that I was at a Corvair show over the weekend
> where Larry Claypool did a tech session. During the session I brought up to
> him that I was having leaking problems with my brand new Viton crank shaft
> seals. He said he has been using them for quite a while and has had no
> problems. However, two other professional mechanics at this session said
> they too had several jobs where the Viton crank seals they used had to be
> replaced with the standards. After the tech session I was talking to Larry
> and told him of my brand new bushing that was screeching. He said he had so
> much trouble with the new supplied bushings that he quit using them and
> started buying NOS Oilite bushings even at highly inflated prices from the
> specialty suppliers. After all what is more costly the bushing or having to
> remove the engine twice? :-)
> 
> By the way I did not mention where I bought my bushing as we are not suppose
> to vender bash on this list. :-) 
> 
> Thanks for the input Kevin. 
> 
> Carlton 
> 
> -----Original Message-----
> From: virtualvairs-bounces at corvair.org
> [mailto:virtualvairs-bounces at corvair.org] On Behalf Of kevin nash
> Sent: Monday, June 06, 2011 12:57 AM
> To: virtualvairs at corvair.org
> Subject: Re: <VV> NOS Pilot bushing wanted
> 
> 
> 
> > Message: 4
> > Date: Sun, 5 Jun 2011 18:41:22 -0400
> > From: "Carlton Smith" <carlton55 at comcast.net>
> > Subject: <VV> NOS Pilot bushing wanted
> > To: <virtualvairs at corvair.org>
> > Message-ID: <007501cc23d1$b23f6d60$16be4820$@net>
> > Content-Type: text/plain; charset="us-ascii"
> > 
> > Hi Guys,
> > 
> > Does anyone happen to have NOS GM Oilite (not sure I am spelling that
> > correctly)pilot bushing they would sell me? GM #6256648. I am though with
> > the aftermarket ones we are getting. In my recent engine rebuild and
> clutch
> > refresh the brand new pilot bushing screams it head off in the morning
> when
> > I start out. Eventually quits once things warm up. We sure never had that
> > problem with the original Oilite ones! In fact I would buy 2 if someone
> had
> > then to sell.
> > 
> > Thanks!
> > 
> > Carlton Smith
> > Indianapolis, IN
> > Circle City Corvairs Club
> > 1965 Corsa 180 Turbo convertible 
> > 
> Carlton- I had replaced the pilot bushing five years ago on my car and put
> a few thousand miles
> on it with no problems, however, it screached once after a long trip. A few
> months after that, I blew
> up the clutch, and then had to pop the engine out to fix the exploded clutch
> plate. I determined that
> my input shaft was no longer straight, and replaced the input shaft, clutch
> plate, and had the pressure
> plate and flywheel rebalanced. That was in 2008, and I have put 15,000 miles
> on it since then with
> absolutely no problems with screachy pilot bushings. Probably, your input
> shaft is a bit worn, or is
> somehow slightly undersize, and is causing the screach, untill it gets warm.
> All pilot bushings that
> I have bought for my Corvairs, including the one I bought in 2008, were
> Oilite (not brass orsome other
> weird wrong material that a magnet can stick to), and on all of them, it was
> a chore to get the 
> input shaft in, as it had a slight interference into the new pilot bushing
> (once the bushing was installed).
> All of my pilot bushings were from Clarks.
> 
> Kevin Nash
> 63 spyder, daily driver 
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