[Vwdiesel] homemade valve compressor

[Marcel]

LBaird119 at aol.com wrote:

>   Drilling and maching guides is cast iron work (domestic V-8's and such).  
> Most aluminum have silicon bronze or phosphorous bronze (I think) 
> guides, which are generally press in and out.  Cast ones neeed drilled, 
> pressed, shaped and reamed. If you have the tool that fits all the way 
> down the guide, when you press or drive then in, then reaming very 
> well may not be needed as the tool holds the dimension.  Otherwise 
> you need an 8mm reamer.  I've found that you use a good lubricating 
> oil for the intakes and something very light or dry on the exhausts.  
> You want the exhaust guides a tad more loose than the intakes to 
> start with.  
>   I can see why you'd test with a new valve.  The exhaust stems 
> wear.   Most that I've checked were tapered to .003" of wear.  Not 
> much of a test of the guide with a valve like that!
>      Loren

Well at least if they're tight with an old valve, you're in the clear. 
If they are loose... then try a new valve to find which is worn. Usually 
the guide first though, in case of bronze guides which are generally 
softer than hardened steel valve stems.

Marcel