Hi everyone, I have an annoying noise coming from the heater core.
When driving any faster than say 70k it makes this high pitched rattle, like killer robot crickets!
I drive with the radio on constantly to get rid of it but sometimes I like to turn the radio off.. Then I can hear it.

I'm assuming when it was replaced it didn't have foam put around it (found that on another thread)
Is there a way to stop it rattling without removing the whole dash?

Please say yes!