Wait,was that wet compression check taken intentionally or????? Sorry, didn't
mean to make light of the fact that you have a serious problem.Head gasket or cracked head/
block,really that's it, hope it's just a gasket!! Keep with the updates :coffee2:
P.S. detonation isn't always audible unfortunately,it can manifest as a growl/
rumble w/o any dramatic noises that stick out,word to the wise.