Sounds like a chain is dragging on the bottom of my car

there are 2 engines 2.0 / 2.3 and they both have chains if you are getting a rattling sound from the cover front the guides are worn or the chain tensioner are worn the guides have nylon chain runners on them and if they wear down the chain is rubbing against the metal arm that the nylon is mounted on if this is a high mileage motor I would suspect this because the chain can not be kept tight because of the worn guides have now caused the chain to be slack and its rubbing against the front engine cover but you must be sure before opening it up that its not the water pump or belt tensioner pulleys making the noise if that's what your hearing the water pump will sound like a marble tumbling around in a can the pulley's will sound like constant friction grinding of the dry bearing inside against the bearing race there also may be a chirping sound of the belt being made from it grabbing each time the bearing catches inside and releases the chain will sound like a constant rattling as if you drag a metal chain on a ceramic tile floor and engine running condition will be rough idling and missing a bit especially when you come to an abrupt stop it may stall

sounds like head gasket failure correct problem,and do not drive

it might be a loose chain that drag on the bottom of the case.
have a shop to do this job if you dont have enough knowledge for changing chain of transfercase.
and be sure to use the right type of fluid.

when your front brake pads wear down to minimum pad thickness a metal tab scrapes against the brake rotor signalling you to service your brakes because there is very little brake material left. this may be the sound you hear.

If it sounds like a large vacuum cleaner, plugged catalytic converter. If it sounds like marbles being spun rapidly around inside a can, power steering pump fluid. If it sounds like metal dragging on metal bad bearings in alternator or water pump. If it sounds like "whirr" timing chain going bad. If it sounds like a motorcycle, bad exhaust pipe or muffler.

Does this sound occur while th engine is running and the car is sitting still? Or only while driving? If so look at the exhaust pipe under the engine, there is a section that looks like flexible pipe, at either end there is a thin washer-like connector or fastner is it dangeling from the pipe, if so that is probably your noise. I had the same jingling noisre in mine and that was the problem, I just cut it off and the noise never came back. Hope this helps, let me know.

Yes, and it probably is your wheel bearing. Hearing a sound like a chain dragging is classic. You may also hear a clicking noise or chain dragging noise when turning to the left or right.

Look under the car and see if the rubber boots that surround the axle near the tires are cracked and leaking grease. If so, it is almost a certainty that the bearings are bad as you have lost grease and thus lubrication to the bearings.

Good luck,
bob

Mine does the same thing.
mine will rattle like a chain dragging after I drove it a little while and it heats up. You don't hear it so much when you accelerate as you do when you let off of the throttle I don't hear it so much when I turn right but I do hear it when I go left. I had it in the shop they checked my transfer case refilled it with fluid but I still have the same noise. They claim they don't hear it but they don't drive it Long enough for it to start rattling.

Sounds like you need a new exhaust.