A loud rattle type noise may be noted from the engine after a cold start. This can be caused by a faulty valve timing control actuator. Replacing the failed actuator will commonly correct this noise issue.Google+
Car Problem Reports
Acura TSX Loud Rattle Type Noise from Engine After Cold Start
Acura TSX Problem
Engine Affected: 2.4L 4 Cylinder
Average Mileage: 73,642 mi (15,800 mi - 135,000 mi)
Visitor, 2009 Acura TSX, 108,000 mi
after start car makes a noise for a couple seconds then go away
Visitor, 2009 Acura TSX, 63,126 mi
On first startup, rattle noise heard from engine bay, once in a blue moon but annoying.
Visitor, 2010 Acura TSX, 2.4L 4 Cylinder, 85,000 mi
Same issue, rattle on cold start...
Visitor, 2005 Acura TSX, 73,500 mi
Visitor, 2011 Acura TSX, 2.4L 4 Cylinder, 36,000 mi
Loud grinding, plasticky rattle from engine on cold start
Visitor, 2009 Acura TSX, 71,000 mi
Same issue...horrific noise made at cold start. Need to take it in. Wanted to check here first.
Visitor, 2009 Acura TSX, 63,500 mi
A loud rattle type noise may be noted from the engine after a cold start.
At just under 16,000 miles I am hearing a rattle upon start up in the morning or after the car has been sitting for a few days. It quickly goes away and doesn't happen anymore for the rest of the day. I have an appointment with the dealership to correct the problem. It is still under factory warranty. Im glad to hear other people have experienced the same issue. I love this car and want it fixed. Ive had it 3 years and have had no other issues at this time.