Question about 2002 Isuzu Trooper
Look under the car to see if there is a loose heat shield around the exhaust pipe/catalytic converter area. Look right between the front seats (under the car). The front portion normally rusts away from the bolts holding it in place. This is like a ****-shell part - the top half or bottom half vibrate against the catalytic converter (sounds like knocking). Dealer can fix for about $100. You can fix for about $5.
Get a small piece of fiber glass fabric (auto store) and fold nicely and fit betwen the loose parts. Then get 3 pieces of 10 gauge copper about 18 inches long and wrap around the entire heat shield and twist tight. This will stop the vibration and last a long time in harsh environmental conditions. Do not just drive without the heat shield. You can melt your carpeting and start fires if you ever drive on grass.
Posted on Nov 19, 2009
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Posted on Jan 02, 2017
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