Q: Loud sound from engine/Front near or under Front seats

asked by on April 29, 2017

A while ago I noticed a loud sound coming from underneath my car. Me and a buddy realized it was the exsaught gasket and changed them. The sound seemed a little quiter for a while now it's incredibly loud. It sounds like rattling when in idle or stopped. When I shut off the car it sounds like something is about to fall off! Im a 18year old and don't have alot of know lage on cars or money and was wondering what this problem could be!

My car has 150000 miles.
My car has an automatic transmission.

It sounds like you may have a loose heat shield on your exhaust. These heat shields are installed to prevent exhaust heat from reaching other components of the vehicle. These shields can often rust themselves loose and cause this rattling sound you are hearing. I would recommend having a qualified professional inspect your exhaust system to determine if any heat shields are loose. If so, depending on what they are shielding heat from, you can just have them removed. If they are protecting anything important however I would recommend having new ones installed.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Can bad coils fry that computer the PCM

OBD-II PCMs have circuit protection to take account of the possibility of shorted actuators (fuel injectors, coil drivers) and other electrical overloads. Statistically, the PCM is probably the most reliable component on the entire vehicle. If the cause of the...

Car dying while driving

The most likely cause is a dirty throttle body. The throttle body controls the amount of air the engine is getting. Your engine is drive by wire meaning there are sensors in the accelerator pedal, and a motor controlling the...

What if I already have all the new parts just need someone to install how much will that

Sent to CS

Related articles

Understanding the Pontiac Oil-Life Monitor and Service Indicator Lights
Car symbols, or dashboard lights, are a car service reminder. The Pontiac Oil Life Monitor (OLM) indicates when and what service your car needs.
The Best Used Cars to Buy for Occasional Drivers
Not Not everyone relies on their car on a daily basis. Maybe you aren’t the type that deals with a daily commute, and running from here to there constantly. If that’s the case, you may be looking for a car...
How to Buy a Classic Pontiac
Whether you want to buy a classic Pontiac for yourself or as a gift, here are some tips on buying one for a great value.