[s-cars] Bottom-End...

[Charlie Smith]

Earlier, Cody Payne wrote:
> 
> Gents,
> 	Any estimates if I "don't" do the bottom end of the car and do
> the valve job ONLY and HAVE to do it later due to loss of
> compression/blow-by/Oil Burn?  Do you have to pull the head again? 

Ummm.  Let me see if I got all that right.

You are thinking of doing a valve job now.  

You think maybe sometime later you will have to do the rest 
of the engine due to general wear and such?

If the rest of the engine is good, or OK, now ... and a leak
down test says your valves are leaking - yeah, do a valve job now.
Make sure they don't sink the valves too deep into the head, that's
bad for flow.

If you need to rebuild the rest later, you absolutely will have
to pull the head off again.  Probably after you take the engine
out of the car.  For a rebuild to "repair" loss of compression and
oil burning, you really will pull the engine and take -everything- 
apart.  You will probably want to bore the cylinders, fitting 
oversize forged lighter, lower compression, pistons, along with 
stronger lighter connecting rods.  

You really have to take everything apart to get things surgically clean.
Boring the cylinders, or even just honing them to fit new rings means
metal grit on everything.  Thus, the take it clear apart to get it
clean.   

Plan it right, and you can add a lot of horsepower during the
operation   :-)

    - Charlie


  Charlie Smith   charlie at elektro.cmhnet.org  614-471-1418  
  http://www.elektro.com/~charlie      Columbus Ohio   USA
  http://www.elektro.com/~audi     photos & technical info

  95 S6 Quattro  -  24 PSI, RS2 6 speed, and other features  
  97 Dodge Ram   -  40 PSI, 4x4 w/Cummins turbo diesel