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: 73,900 mi (36,000 mi - 125,000 mi)
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.