2010 RX - Engine drone
04-22-18 | 05:58 AM
#2
Pit Crew
Joined: Jun 2015
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From: Ontario
I fixed mine by adding a couple of dampers on cat converter
Jim
05-02-18 | 04:58 AM
#4
Lexus Test Driver
Joined: Aug 2007
Posts: 1,254
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From: Western Australia (Australia)
Can you show some pics of the work you had done. I get the drone on and off.
05-02-18 | 08:25 AM
#5
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From: Ontario
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Texasdeere (04-29-22)
05-05-18 | 04:26 AM
#6
Lexus Test Driver
Joined: Aug 2007
Posts: 1,254
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From: Western Australia (Australia)
Looks like an easy install. What I would like to know though is how does doing this on the catalytic converter stop the engine drone? They are vibration dampers and I am not sure how the drone is associated with the vibration.
05-05-18 | 06:37 AM
#7
Pit Crew
Joined: Jun 2015
Posts: 111
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From: Ontario
My drone was most evident at abt 1600 rpm. This was right at my cruising speed of 100 km/hr. Very annoying. I could feel the vibration in the passenger inboard seatbelt. That led me to look under the car and that revealed that the cat exhaust hanger is bolted to the floor in the same location. Thus it was pretty obvious the vibration was coming from this location. Without getting into a long engineering description, the root cause was that the cat converter section was vibrating at its natural frequence at abt 1600 rpm. Thus the solution was to add dampers to prevent it vibrating so much at this point.
Jim.
Ps. The supposed Lexus fix for the 4th generation RX was a new cat converter section with 1 damper. Seems to be partially effective for those owners. Their exhaust is a different design than ours but had the same or worse drone problem.
Jim.
Ps. The supposed Lexus fix for the 4th generation RX was a new cat converter section with 1 damper. Seems to be partially effective for those owners. Their exhaust is a different design than ours but had the same or worse drone problem.
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05-12-18 | 12:15 AM
#8
Lexus Test Driver
Joined: Aug 2007
Posts: 1,254
Likes: 15
From: Western Australia (Australia)
My engine / exhaust drone seems to be more evident around the 1500 - 1750 mark (given the markers on the tachometer). I suspect then that the (from what I have read) the harmonics at that level seem to be the main problem. I just have to go find these parts now and then install the things and see what difference it makes. Looks like a fairly quick install and fix.
05-12-21 | 09:43 AM
#9
Driver School Candidate
Joined: May 2021
Posts: 1
Likes: 0
From: va
My drone was most evident at abt 1600 rpm. This was right at my cruising speed of 100 km/hr. Very annoying. I could feel the vibration in the passenger inboard seatbelt. That led me to look under the car and that revealed that the cat exhaust hanger is bolted to the floor in the same location. Thus it was pretty obvious the vibration was coming from this location. Without getting into a long engineering description, the root cause was that the cat converter section was vibrating at its natural frequence at abt 1600 rpm. Thus the solution was to add dampers to prevent it vibrating so much at this point.
Jim.
Ps. The supposed Lexus fix for the 4th generation RX was a new cat converter section with 1 damper. Seems to be partially effective for those owners. Their exhaust is a different design than ours but had the same or worse drone problem.
Jim.
Ps. The supposed Lexus fix for the 4th generation RX was a new cat converter section with 1 damper. Seems to be partially effective for those owners. Their exhaust is a different design than ours but had the same or worse drone problem.
I have the EXACT same issue on my 2013 venza. The exhaust drones under light acceleration and there is no TSB. I will try installing 2 dampers on either side of the catalytic converter. The sound is so annoying and I cannot take this anymore!!
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