[Vwdiesel] compression readings

[gary]

Sounds like a gasket or valves to me.

Pull the head and throw a straight edge across it. You can hand lap the
valves and see if they clean up.

A warped head can be milled, but that it not the preferred method.
Bolting it to a big hunk of straight iron and heat soaking it is
preferred. 

-Gary



On Wed, 2004-09-08 at 17:00, Chris Collin wrote:
> I've just completed my compression test on the diesel scirocco.
>   After the snafu of finding out I grabbed the wrong oxy-acetylene
>  gauge (too low), I quickly borrowed the neighbors higher gauge. 
>  #1 and #2 read around 400.  #3 and #4 read around 0.  The 
> gauge marks are really tight at the low end so I used my gas 
> compression gauge and tried again.  #1 and #2 were 340+, #3
>  was 130 and #4 was 110!  On a wet test #3 was 150 and #4 was
>  160.  That and the fact that the heater and water temp gauge got
>  hot really fast makes me think head gasket for sure.  How do you
>  guys think the wet/dry variance speaks for ring condition?  I'm 
> thinking that the fair readings in #1 and #2 probably speak well
>  for them.  Unfortunately, my fuel filler vent hose rubbed the tire
>  and tore the gravity vent valve off on the warm up drive! Ouch!  
> Time for some re-engineering on the filler neck system!
> 
> 		
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