Date: Mon, 10 Oct 2016 12:24:45 -0700
Reply-To: Neil N <musomuso@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Neil N <musomuso@GMAIL.COM>
Subject: Re: Diesel Folks: Machine Intermediate Shaft?
In-Reply-To: <CAFnDXk1Bh0+5wad8gMDFOK9mXndezQ9Zw5RZLwZXjobBOk=DXQ@mail.gmail.com>
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> NO!!! No need. Does he want to smooth the inside of the block too? : )
haha. Maybe!
Out of curiosity, I may reinstall the intermediate shaft and put a
dial gauge on it.
Ironically, I don't see mention of bearing/journal specs in my A3 Bentley.
From what I've read of the Vanagon Diesel, even replacing the bearing
at pulley end is better than nothing and can be done by the average DIY
type. But I think I see part of your point; the oil pump is driven off
this shaft
via the dizzy.
Thanks for shop cost estimate. I'm thinking it will be money well spent to have
a machine shop to hone the cylinders, R&R intermediate shaft bearings
and hot tank block..... after they check block deck for any excessive warpage.
I don't see any, however, and don't see any at head either.
On 10/10/16, Jim Felder <jim.felder@gmail.com> wrote:
> 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
>>
>> Blog: Vanagons, Westfalia, general <http://tubaneil.blogspot.ca>
>>
>> 1988 Westy Images <https://picasaweb.google.com/musomuso/New1988Westy>
>>
>> 1981 Westfalia "Jaco" Images, technical
>> <http://tubaneil.googlepages.com/>
>>
>> Vanagon-Bus VAG Gas Engine Swap Group <http://tinyurl.com/khalbay>
>>
>
--
Neil n
Blog: Vanagons, Westfalia, general <http://tubaneil.blogspot.ca>
1988 Westy Images <https://picasaweb.google.com/musomuso/New1988Westy>
1981 Westfalia "Jaco" Images, technical <http://tubaneil.googlepages.com/>
Vanagon-Bus VAG Gas Engine Swap Group <http://tinyurl.com/khalbay>
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