FIf anyone is curious, I just rang, they said they sprayed some fluid around the manifold and it was bubbling. Going to be 2 hours labour to 'seal it up' and 12 week wait on ordering a new manifold, they quoted $20 for the part.
Looking at $280 for the two hours...as long as it runs until I can get the long term fix I suppose.
Someone earlier posted about what they said. I even rang and asked the last mechanic that directly and he said he checked it.
They straight up lied to me then, might look into a refund