[Vwdiesel] Compression check with Hyd lifters and Alum head

[LBaird119 at aol.com]

Has anyone pondered this question.  How do you get an accurate reading of 
compression when you have hyd lifters and an aluminum head without 
damaging/galling threads.  I have read that one should NEVER remove steel 
spark 
plugs(Injectors too, I imagine) from a hot aluminum head.  Galling of the 
threads results. 


  Anti seize.  If they're wanting to take it in then YOU pull the plugs 
ahead, 
while cold, and put some on the threads.  Then it won't be an issue pulling 
them hot.  Usually a lifter doesn't tend to bleed down THAT much just 
cooling off (surprisingly) but you want the engine warm for a compression 
check.  The oil pressure usually comes back up while cranking since you 
need about 8 to 10 revolutions/test but you have all the plugs/injectors 
out so that the starter is only fighting one cylinder instead of all 4 (or 
however many).
     Loren