The motor in the 2004 Nissan Pulsar my partner's brother bought new has blown. The mechanic has told me that a rod has put a hole in the crankcase. They have offered us a reconditioned motor for $7000 with a one-year warranty a second hand replacement for $2950 with a three-month warranty, both fully installed. Should we accept one of the offers, or should we take it further with Nissan?
It's most unusual for an engine to break a connecting rod under normal driving conditions if the engine has been serviced regularly and the oil changed. After so many years it's unlikely to be a manufacturing fault, so I doubt that you would have any chance of getting Nissan to even listen to your case. I would suggest you take up one of the offers you have in front of you.