Question about 2007 Kia Rio 5 Sx M/T Hatchback
Idle RPM is usually higher when the engine is cold. It could be a couple of things as obviously I can't listen to it.
I would check the motor and transmission mounts to make sure one has not failed and also the craddle mounts at the body.
The other possibility could be drive train slack. When you put the car in gear, all of the chain and gear tolerences begine to move forward and have to take out all the slack in the powertrain. As all of that is taken up, you here the "thunk", so it may be normal.
With the hood open, have someone put the car in gear (don't stand in front of it) and watch the engine, if it appears to "roll" or shift in the engine compartment, have the mounts checked.
Let me know.
Posted on Jul 19, 2009
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Posted on Jan 02, 2017
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