On my SS the Holden Dealership cracked the sump (first they told me a rock hit it..bit hard with a huge plate under the engine) then I found out it was from overtightening the sump plug.. they tried to charge me 1700 bucks for a new sump

as they said it must have been done in the past.. the manager was quick to wave the charge after I showed him that all service was done at his dealership.
Tossers
And a few months ago I put a new clutch in the SS.. drove it home and the car had the worst knocking sound.. they forgot to bolt the gearbox back in..nice!
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