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Old 11-29-2019, 05:07 PM   #1
gammaxgoblin
Scooby Newbie
 
Member#: 507111
Join Date: Oct 2019
Default 2009 impreza 1500 rpm vibration when cold

Hi all, I have a question about my 09 impreza 2.5i with 106k miles. I just did my first oil change(3k miles) and fixed the heat shield rattle which was coming from the shielding near where the headers start. The thing I realized is that the heat shield rattle was masking and probable caused by a vibration which happens at around 1500 rpm when engine is cold. This goes away once the blue coolant light goes out basically. There is a slight hesitation at 1500 rpm when cold as well. Any thoughts?

(all the major maintenance like timing belt, head gaskets, rear main seal were done)
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