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Re: [T3] engine diagnosis


<x-charset iso-8859-1>Well, I agree with Jim that this has limited sucess but if you read the Berg
suggestions he reccomends a special break in lube with a 20minute session of
CONSTANT 2000-2500 RPM, 3000 is a bit too high... and of course this is
AFTER he breaks them in on his jig for 24 hours!

Good luck with things

Keith
]
----- Original Message -----
From: <veedub@apartment101.com>
To: T3 List <type3@vwtype3.org>
Sent: Sunday, November 04, 2001 10:11 PM
Subject: Re: [T3] engine diagnosis


> There's been a lot of discussion against using used cams with new lifters.
> Here is how I will be hardening the reground cam with the new German
> lifters:
>
> 1.  Finish assembling the engine and adjust the valves.
>
> 2. (Install oil) and turn engine over for about one or two minutes without
> ignition to get oil pressure built up.
>
> 3.  Connect ignition, start the engine and run at 3000 RPMs for 3 - 3.5
> minutes
>
> 4.  Shut the engine off and immediately drain the oil.  Let cool
overnight.
>
> 5.  Add fresh oil, disconnect ignition, turn engine over another minute to
> build up oil pressure, then reconnect ignition.  Run again at three
minutes
> around 3,000 RPMs.
>
> This will harden the CAM and the LIFTERS together; I learned this from a
VW
> racing enthusiast - he has used this method since they started leaving
Zing
> (?) out of the metallurgy, and the cams and lifters harden together just
> fine.  It works like a charm.
>
> Jason
> 68 Notch
>
>
>
>
> ----- Original Message -----
> From: "Jim Adney" <jadney@vwtype3.org>
> To: "T3 List" <type3@vwtype3.org>
> Sent: Friday, November 02, 2001 10:14 PM
> Subject: Re: [T3] engine diagnosis
>
>
> > On 2 Nov 2001, at 19:36, Keith Park wrote:
> >
> > > OK... I hadnt been able to picture this in my head... it makes sense
> > > now! so long as the adjusters can take out the distance without
> > > changing the valve geometry.
> >
> > Right
> >
> > > Berg explains that we actually create a hardness layer during
> > > breakin and is why breakin is so critical... I think there is
> > > surface hardness when the came is manf though.
> >
> > I think there are various ways to create the right surface. Work
> > hardening upon first use seems to me to be a terribly
> > undependable way to do this, but I think that is what is done with
> > some cams. I'd rather see them induction hardened like crank
> > journals and gear teeth, but whatever works reliably is fine with me.
> >
> > -
> > *******************************
> > Jim Adney, jadney@vwtype3.org
> > Madison, Wisconsin, USA
> > *******************************
> >
> > -------------------------------------------------------------------
> > Search old messages on the Web!  Visit http://www.vwtype3.org/list/
> >
> >
>
>

</x-charset>

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