air intake melting from insied out around main manifold vacuum port

Yes I am sure the plastic is melted and it caused tiny holes which are appearing around main manifold vacuum port from air plinum to pcv valve. This port can be removed and I removed it. It has an O ring seal. This part was melted and fused to air plinum inside. Melting is from inside plinum not from pcv gases. these parts not melted.

could it be excess heat from a bad egr valve?I am having the same exact problem with my 2006taurus.the pcv valve melts and fused to the intake manifold.what's the fix? Please help.Thanks!!!

I have the same problem have you found a answer to this problem?