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Are you having problems with your 2001 Holden Monaro? Let our team of motoring experts keep you up to date with all of the latest 2001 Holden Monaro issues & faults. We have gathered all of the most frequently asked questions and problems relating to the 2001 Holden Monaro in one spot to help you decide if it's a smart buy.
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You'd need to have an experienced mechanic listen to the noise to determine if it's piston slap or not. The LS1 certainly rattled on cold starts due to piston slap, and it used oil, they were the giveaways to a problem with the engine. Yours could have some piston slap, but your description suggests it's not serious, and certainly if the engine isn't oil to any degree I wouldn't be concerned. The noise could also be a worn lifter, that's why you need someone with experience to listen to it.