[V8] Ball hone

[Coleman, David]

I recall that alusil / refurbish chatter as well, but hadn't recalled if
a ball hone was invasive enough to do damage.  I have no reason to
suspect any of the cylinders in my 4.2 are anything but pristine... When
I finally get into it, I'll stick to something relatively harmless.  I
wonder if coca-cola would work (j/k). 



> -----Original Message-----
> 
> I see some talk here about nikasil - and AFAIK, these motors 
> are all Alusil. I am unaware of any model year differences 
> and the Audi Technician training manual from I believe 1989 
> says they are Alusil.  
> You can have either technology refurbished - but it takes 
> very specialized equipment.
> I had a link to a shop that could do it, and I believe Ron 
> found it as well.
> 
> All I had to do was clean out the bores (my machinist did 
> this so I don't know exactly what he used) and install the 
> new rings. Since I was mechanically in spec everywhere, I 
> have had no problems, and oil usage has dropped dramatically.
> The one thing I did not do was change the lifters, and they 
> are clacking a little. Not a big deal I think but slightly irritating.
> I have not driven the car too much lately but last week I 
> took a 350 mile trip with extended driving time at 100MPH 
> (gotta love southern Idaho). The oil level on the dipstick 
> did not change. My old motor would have sucked down a 1/2 
> quart on that trip.
> 
> Dave
> 
> 
> On Aug 14, 2007, at 8:20 PM, Coleman, David wrote:
> 
> > So what exactly are you saying Dave?  It's safe or not?
> >
> > ;-)
> >
> > I'm going over in my mind the top end work I'm planning, and was 
> > thinking about doing the rings (and bearings if needed) while the 
> > heads were off. I'd leave the  block in the car and not touch the 
> > crank (that stuff will rot your brain).
> >
> >
> >
> >
> > --------------------------
> > David A. Coleman
> > BlackRock
> > Sent via BlackBerry Wireless
> >
> >
> > ----- Original Message -----
> > From: v8-bounces at audifans.com <v8-bounces at audifans.com>
> > To: v8 at audifans.com <v8 at audifans.com>
> > Sent: Tue Aug 14 21:43:22 2007
> > Subject: Re: [V8] Ball hone
> >
> >
> >
> > IT IS NOT SAFE TO RUN A BALL HONE THROUGH THE CYLINDERS!!!
> >
> > DO
> > NOT DO THIS!!!
> >
> > YOU WILL DESTROY THE BLOCK!!!!
> >
> > If the
> > cylinders are within wear limits, just clean them up with a 
> chemical 
> > cleaner and call it good. If they are out of wear limits, 
> well - you 
> > are hosed unless you want to find a qualified shop to refurbish the 
> > block. It can be done but you may as well just buy a new 
> A8. It will 
> > probably be cheaper and easier.
> >
> > Are you replacing the rings?
> >
> > I
> > would start talking to pashamad. He helped me get my motor 
> rebuilt and 
> > it seems to be running great. His method - and the one I 
> used - was to 
> > leave the crank in place, just replace the rings, and 
> re-use the old 
> > rod bearings. Of course everything was measured and 
> verified to be in 
> > spec.
> > (bearings and bores)
> >
> > For that matter - he just listed a rebuilt motor here a few 
> days ago 
> > from a wrecked car. That might just be the easy fix for you 
> - unless 
> > you are a glutton for Audi punishment like I am
> > :-)
> >
> >
> > Dave
> >
> >
> >> Just to be sure, it's safe
> > to run a ball hone through the cylinders?  Or
> >> is there some
> > detrimental effect on the lining?

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