Caro86 Posted March 7, 2023 Share Posted March 7, 2023 (edited) Hello everyone! We just took our '86 Conquest out on our first long trip with it. Day 1, no issues with the truck functioning (though we might have a leak in our water system... TBD). Day 2, out of nowhere while going about 60mph on the highway, a rattling noise started. We thought it was a loose piece underneath the cab (one side of the emergency brake was broken and the wire was moving freely; then we found another piece that looks like a spinner top that used to be zip-tied and wasn't anymore. Securing both pieces didn't help. It starts when we reach about 55mph, and doesn't seem to be dependent on accelerating/changing gears/braking/anything else. It keeps on going until we've come to a complete stop, and doesn't seem to start up again until we get on the highway. The sound is pretty even on both sides when sitting in the middle of the cab with both windows rolled down. I took the video when we were veering off of the highway so we could limit the sound of the wind, but it's still pretty loud - I'm sorry! Underneath the wind rippling is the jingling/rattling sound that we can't figure out. Any thoughts would be much appreciated! Thank you! IMG_7476.mov Edited March 7, 2023 by Caro86 Quote Link to comment Share on other sites More sharing options...
fred heath Posted March 7, 2023 Share Posted March 7, 2023 (edited) 1 hour ago, Caro86 said: Hello everyone! We just took our '86 Conquest out on our first long trip with it. Day 1, no issues with the truck functioning (though we might have a leak in our water system... TBD). Day 2, out of nowhere while going about 60mph on the highway, a rattling noise started. We thought it was a loose piece underneath the cab (one side of the emergency brake was broken and the wire was moving freely; then we found another piece that looks like a spinner top that used to be zip-tied and wasn't anymore. Securing both pieces didn't help. It starts when we reach about 55mph, and doesn't seem to be dependent on accelerating/changing gears/braking/anything else. It keeps on going until we've come to a complete stop, and doesn't seem to start up again until we get on the highway. The sound is pretty even on both sides when sitting in the middle of the cab with both windows rolled down. I took the video when we were veering off of the highway so we could limit the sound of the wind, but it's still pretty loud - I'm sorry! Underneath the wind rippling is the jingling/rattling sound that we can't figure out. Any thoughts would be much appreciated! Thank you! IMG_7476.mov 8.03 MB · 5 downloads Many times the catalytic converters have a sheet metal heat shield around them. The metal holding tabs rust out causing the heat shield to drop on top of the converter creating a rattling sound. Check the area around the converter for any loose metal pieces. Edited March 7, 2023 by fred heath Quote Link to comment Share on other sites More sharing options...
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