Primary Cats Deleted...now it rattles and rumbles
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From: Los Angeles, CA
2005 E55
Primary Cats Deleted...now it rattles and rumbles
I had the primary cats replaced with straight pipes. Secondaries are still in place. Resonators were already removed.
Now the car rattles. The whole car shakes when I decelerate.
I was think of adding flex joins/pipes on the straight pipe to try to get rid of the rattle, or maybe resonated test pipes?
Any other suggestions?
Thanks.
Now the car rattles. The whole car shakes when I decelerate.
I was think of adding flex joins/pipes on the straight pipe to try to get rid of the rattle, or maybe resonated test pipes?
Any other suggestions?
Thanks.
Last edited by phatmitzu; Apr 13, 2008 at 05:13 AM.
Thread Starter
MBWorld Fanatic!
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From: Los Angeles, CA
2005 E55
It feels like Im driving a HEMI truck with straight pipes...
I know that the V8 rumbles more with exhaust modifications, but this was pretty bad. At 1500 to 2500 rpm, the exhaust rattles and shakes, and I can hear the vibration of the pipings. At higher RPMs, it goes away.
We checked it and there was no exhaust leak. Nothing was touching the heatshield either.
The secondary cats still have the cross-over.
Sounds great though.
I know that the V8 rumbles more with exhaust modifications, but this was pretty bad. At 1500 to 2500 rpm, the exhaust rattles and shakes, and I can hear the vibration of the pipings. At higher RPMs, it goes away.
We checked it and there was no exhaust leak. Nothing was touching the heatshield either.
The secondary cats still have the cross-over.
Sounds great though.
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300ce
I had the primary cats replaced with straight pipes. Secondaries are still in place. Resonators were already removed.
Now the car rattles. The whole car shakes when I decelerate.
I was think of adding a flex join on the straight pipe to try to get rid of the rattle.
Any other suggestions?
Thanks.
Now the car rattles. The whole car shakes when I decelerate.
I was think of adding a flex join on the straight pipe to try to get rid of the rattle.
Any other suggestions?
Thanks.
Ted
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It really sounds to we like the exhaust is in contact with the car body somewhere. If it is rattling and vibrating all through the car, that is the typical culprit. I would not only check around the cats but all the way back, especially around the mufflers as there are lots of places for them to rub back there.
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'03 E55, Range Rover Sport Supercharged, Ducati 748R
It feels like Im driving a HEMI truck with straight pipes...
I know that the V8 rumbles more with exhaust modifications, but this was pretty bad. At 1500 to 2500 rpm, the exhaust rattles and shakes, and I can hear the vibration of the pipings. At higher RPMs, it goes away.
We checked it and there was no exhaust leak. Nothing was touching the heatshield either.
The secondary cats still have the cross-over.
Sounds great though.
I know that the V8 rumbles more with exhaust modifications, but this was pretty bad. At 1500 to 2500 rpm, the exhaust rattles and shakes, and I can hear the vibration of the pipings. At higher RPMs, it goes away.
We checked it and there was no exhaust leak. Nothing was touching the heatshield either.
The secondary cats still have the cross-over.
Sounds great though.
Thread Starter
MBWorld Fanatic!
Joined: Jul 2006
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From: Los Angeles, CA
2005 E55
Thanks for the replies.
I went under the car and inspected the whole exhaust again. I don't see anywhere contacting. However, I did noticed on one side of the welding the pipings are misaligned. There is abount half an inch step where the welds are. I'm not sure if that is what causes it to resonance. I'm going to have that part re-welded along with putting on the flex-pipes to see if I can fix this problem.
I went under the car and inspected the whole exhaust again. I don't see anywhere contacting. However, I did noticed on one side of the welding the pipings are misaligned. There is abount half an inch step where the welds are. I'm not sure if that is what causes it to resonance. I'm going to have that part re-welded along with putting on the flex-pipes to see if I can fix this problem.
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From: London, UK
No longer stock '06 E55, A3 3.2 Quattro, GLE 400d, R107 280SL, Golf Polo
Did they leave something residual offcuts in the pipes?
I'd go with faulty bracket / welds / fitting hitting body work somewhere. You say when you decelerate ... so look for forward and backward play.
I'd go with faulty bracket / welds / fitting hitting body work somewhere. You say when you decelerate ... so look for forward and backward play.
