Australian Car Repair Issues? Ask an Auto Mechanic for Answers ASAP
Are you quite sure the noise is from the back of the engine?
Are the heat shields still fitted to the front of each downpipe?
Or else you could have a cracked convertor driveplate, known as a flexplate.
Do you need any further help?
I hope my advice has been of assistance to you.
Not common on VZ, but glad you have it sorted.
I have seen this a few times on VT and earlier.