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Most likeyl cause could be a bad pulley
Many different things can cause a rattling noise in a Mazda tribute. Stark by checking the engine belts and all brackets for anything that could be loose and causing a rattle.
I'd like to know too! Mine does the same thing - it makes a rattling noise upon startup that goes away after 30 seconds or so and isn't present while driving or idling.
i had a rattling noise in my 2000 ls, was told it was worn tensioners on timing chain. i guess they are made out of a poly carbon and wear after a while. haven't fixed problem yet...
an air leak in your intake will cause the engine to rattle. Protege's intake hoses are prone to cracking.
bad transfer case
There are a number of causes for a rattling noise that occurs in a car. These include low oil and an engine that is faulty or going out.
Vanos
When you here a rattling noise from the engine at idle.
Something's rattling around inside your door. You'll need to pull the door panel off and remove/repair whatever it is.
The rattling noise is in there so you can move the head around.