Rattle from under the car after driving around?

[modmonster2008]

Ok so my car has been acting up lately after the head gasket replacement, when you fire it up it sounds fine, but after the engine warms up and i drive it around the block, i park it and something sounds like its ratting under the car, i tried fixing up the exhaust already, all the brackets under are tight, i just dont know what is causing it, sounds like its related to the engine/transmission but i hope not, anyone know how i can fix this? If im lucky ill try posting a video if it but ill see

 

[Bill UK]

I had the same problem after pulling my engine and re-fitting it, turned out to be the second cat knocking on the transmission tunnel. It’s a bit of a tight squeeze under there on the passenger side. (US model)

 

[modmonster2008]

i see, but the sound is more of a "grinding" noise, something like grinding a metal bar on a bench grinder type of noise

 

[CRE]

Chock the wheels and use a stethoscope with a long probe to track it down. If you don't have a steth use a long dowel, something long enough so you don't have to get under the car is HIGHLY advised. Have some else help to ensure the car doesn't move and to assist if something were to happen.

 

[modmonster2008]

well i drove it around the block and once i parked it in the garage something starts rattling but when i raised it up on the hydraulic jack i cant point out where the noise is coming from, it just stops after...

 

[CRE]

well i drove it around the block and once i parked it in the garage something starts rattling but when i raised it up on the hydraulic jack i cant point out where the noise is coming from

Yeah, I kinda figured. Hence the suggestion that you employ a tool designed for diagnosing machinery and locating sounds.... or just a big stick.

it just stops after...

You trying to build the...










suspense? :icon_razz

Stops after what? Help me help you. (<---My high school guidance counselor used to love saying that. I hated that guy.)





Does the sound change when the clutch is either engaged or disengaged?

 

[modmonster2008]

sound stops after i park it for a while, it only goes for a few seconds then it stops, and i have an auto transmission

 

[dumbo]

how about a video pointed were the sound seems to becoming

 

[modmonster2008]

ill try

 

[modmonster2008]

heres a small video, sound only comes when i rev the car after a long drive, listen carefully, turn volume up if necessary...

 

[Muzy]

Loose or completly off nut or bolt- flexplate to t-converter. Stop driving. muzy

 

[Muzy]

Or exaust rattle. muzy

 

[ForcedTorque]

How about the bracket that holds the downpipe to the side of the tranny

 

[dumbo]

it sounds like mine did when the tin guard that covers the steering shaft rattled against the intake manifold, it wouldn't hurt to check that out..mine was bad when the car was idling really lean.

if it is just bend it

 

[cuel]

Sounds like a torque converter bolt to me as well. My exhaust used to rattle against the subframe for the rear pumpkin, and wuold kinda sound like that as well.

 

[Muzy]

Well.....what was it? muzy

 

[modmonster2008]

havent checked on it yet, i was busy the past few days and i got sick lol, maybe on friday cuz i have a day off there, hopefully nothing is broken, just loose