I went under my west yesterday and saw some green and white stuff aroud the heads, not a lot but enought to see it.  I had to look at the heads to see it because there it is not enough leak for a any drop on the ground.  The green and white stuff was dry on the head.  

  Is this mean that it is about time to change the heads gaskets or may I still running for a couple o kilometers like this without any problem?

  I changed my trans. oil for a synth oil.  Let me tell you that I instantly saw the difference

  Thanks 

  Gilles Gallant
  Montreal , Quebec