Date: Mon, 10 Oct 2016 18:53:47 +0000
Reply-To: Jim Felder <jim.felder@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Jim Felder <jim.felder@GMAIL.COM>
Subject: Re: Diesel Folks: Machine Intermediate Shaft?
In-Reply-To: <CAB2RwfjSRDNuw5Q_kb=BqdvzUUH9hbUFJLSgaAg4HfDXBmGw8w@mail.gmail.com>
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NO!!! No need. Does he want to smooth the inside of the block too? : )
Yes, the bearings on something that goes in through a series of webs from
the outside are always "stepped" to make matching possible. This is an
important thing to get right as it is essentially where your oil pressure
comes from. Not entirely, but I'm making a point. If the clearances are too
large you will not have the oil pressure you want. Do it by the book. I
think on a diesel engine it costs me about $75 for bearings and machine
work to get it right.
Jim
On Mon, Oct 10, 2016 at 1:49 PM Neil N <musomuso@gmail.com> wrote:
> Sorry for not being clearer.
> The helpful VW person was referring to machining the cast portion of shaft,
> not the journals.
>
> I haven't measured the shaft OD for any out of round yet (not sure I can)
> but found it interesting that the shaft itself is tapered and that
> the outer bearing journal OD was ~ 1mm larger than inner.
>
> I will likely get at least the outer bearing replaced, or do it myself.
> Regardless, the bearings look ok and I didn't feel any lateral play.
>
> This part does not see a lot of load and doesn't turn that fast.
>
>
> On 10/10/16, Jim Felder <jim.felder@gmail.com> wrote:
>
> > You can get oversized bearings for a turned intermediate shaft, and your
> > shop may have to buy the proper reamers for them. I have never had a
> > problem with anything that slicked up pretty well. Put it on a buffing
> > wheel and see what happens. If it shines, and it probably will, you will
> > save yourself a lot of trouble. And then there's the fact that this is
> the
> > last part on the engine to go out of tolerance, so finding a replacement
> > should be easy.
> >
> > I used to build engines as a teenager helping a guy who raced Sprites at
> > Sebring. He left almost every part of his engines outdoors all winter to
> > rust, and he claimed that the pockets provided by the rust held oil and
> > helped lubrication. I don't know if I buy that or not, but he never had
> > problems from the practice.
> >
> > Jim
> >
> > On Mon, Oct 10, 2016 at 1:26 PM Neil N <musomuso@gmail.com> wrote:
> >
>
> >> The intermediate shaft has a somewhat rough OD.
> >> A helpful VW person suggested that machining
> >> this shaft smooth would help reduce engine vibrations.
>
>
> --
> Neil n
>
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>
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