No noises like that no, I listen out for the 'leaky manifold' because although lots of people have reported it here I've never had it with mine. The noise on cold start is supposed to be a kinda 'screech' ??
You have a good point though and it's always possible there's a leak there. I guess if the inlet tract was smoke tested it is feasible for smoke to exit the exhaust manifold via the head so that might be worth looking out for.
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2005 S40 T5 SE - Manual. Bilstein B4's. (For Sale)
2010 Citroen C4 1.6 HDi (bizarre Gearbox model).
2010 Renault Twingo (refreshingly simple)
2018 Infiniti Q30 1.6T Business Executive (what's this button do?)
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