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Heat shields often corrode and become loose but they usually cause a tinny rattling sound. Eventually they fall off as witnessed by the dozens of them found along highways. Mechanics often remove them (with your permission) if they are loose, because they serve no purpose other than to protect the technician from a very hot catalytic converter that he/she knows not to touch anyway.
A "knocking" sound, however, is more likely caused by a worn or broken exhaust hanger, allowing the exhaust system to bump the underside of the vehicle.
Be sure the engine isn't causing the knocking sound, driving around a car with a knocking sound in the engine can cause MAJOR damage.
Knocking from your undercarriage can also be caused by suspension components that have gone bad or are leaking fluid.
What else can I help you with?
What would cause a Knocking by the torque converter on a 1076 k5 blazer?
Loose converter bolts or a cracked pressure plate.
Can a broke flex plate cause your Chevy Avalanche to vibrate at the rear?
It will cause both vibration and a knocking noise The vibration may feel like it is at the rear of of the SUV but be careful to have the drive shaft checked.
What would cause a noise from the rear of vehicle?
It could be objects shaking in the trunk or something loose on the rear license plate or a problem with the catalytic converter or exhaust pipes.
What causes a clutch to go and a knocking noise all at once its weird cause the knocking noise not that loud at 2 and a half but 3 grand really loud and this all happend when clutch went?
If it is the clutch and not the transmission. The face of the clutch disc may have come off. Dumping the clutch too often can cause this, or can "just happen". It may be packed against the bell housing and hitting the pressure plate. Pressure plate may have lost a spring when the clutch went and it is hitting. You will know when it is taken apart.
What could cause the throttle to be stuck wide open after changing exhaust intake manifold gasket?
Throttle plate stuck - bound up Manifold tightened unevenly? Throttle plate stuck - bound up Manifold tightened unevenly? Control
Does los angeles have earthquakes?
Because it is located close to the edge of the continental plate, which is close to the Pacific plate.
What controls the Choke on Briggs and stratton 4.5?
There are several systems used by Briggs for choke control. Auto choke engines are equipped with a heat sensitive bi-metal coil attached to the exhaust. When cold, the coil closes the choke plate. When heated by exhaust gases, it opens the plate. Most other models have a manual lever to open and close the choke or a primer bulb system.
What tectonic plate is the nearest to Britain?
The African Plate is close to Britain, but Britain is on the Eurasion plate.
What is the metal plate covering the exhaust pipe underneath?
I believe it is a heat shield.
How do plate tectonics cause earth quakes?
Plate tectonics move. But the plate margin that cause strong earthquakes are collision and conservative plate margins. I hope it helped!
What movement does mantle convection currents cause?
They cause plate movement. The plate movement then causes an earthquake.
Where is the starter located on a 1997 Mitsubishi montero sport?
i have an ls 3.0 but mine is on the passenger side above the transaxle. Its covered by a heat shield cause its behind the exhaust. If you have a skid plate youll have to drop it to get to the starter
