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Megane III cold start rattle

My Megane makes a terrible rattle every couple of days when I start it from cold. Only seems to happen when the car has been sat for a while and I think more often when the weather is cold as well.

Makes a good rattle for about 2 seconds, then either stalls or runs normally. It will then start perfectly the next time until its been sat for a little while again.

See video clip:

Any ideas?
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Renault Megane III Dynamique 1.6L petrol
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Re: Megane III cold start rattle

When was the last time it had an oil and oil filter change....
These have hydraulic tappets could be losing pressure, because of the oil .
Possible this is the rattle you hear !

Sometimes I wake up grumpy; other times I let her sleep

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cold , iii , megane , rattle , start

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