Resonance noise and clonking sounds - Citroën ZX

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janneman63
Posts: 17
Joined: 20 Nov 2005, 09:48

Resonance noise and clonking sounds - Citroën ZX

Unread post by janneman63 »

There is a resonance noise in my ZX when I accelerate in first and second gear and then, when I have reached my cruising speed, it (almost disappears).
There is also a rather heavy CLONK from somewhere under the rear part of my car whenever I start the engine.
These sounds appeared quite suddenly when I was out driving, suddenly they stopped for a while and now they have returned again...:(
Could it be the exhaust hitting the body somewhere...or could it be something even nastier... :shock:
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citroenbx
Posts: 132
Joined: 25 Jul 2005, 18:14

Unread post by citroenbx »

Not sure what you mean "Resonance Noise" could you explain this a bit more.

The noise could be one of a few things : Exhaust or the Spare Wheel carrier or even the rear Rubber Sub Frame mounting bush's this sounds a
clonking when traveling over uneven surface's you can do a search on here for instructions how to diagnose and replace them.

Cheers
Life feels good just as you complete No4 Glow Plug on a ZX-TD
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janneman63
Posts: 17
Joined: 20 Nov 2005, 09:48

Unread post by janneman63 »

citroenbx wrote:Not sure what you mean "Resonance Noise" could you explain this a bit more.

The noise could be one of a few things : Exhaust or the Spare Wheel carrier or even the rear Rubber Sub Frame mounting bush's this sounds a
clonking when traveling over uneven surface's you can do a search on here for instructions how to diagnose and replace them.

Cheers
It's like a droning sound at acceleration (coupled with a slight vibration). On the other hand, the car is silent when going over bumps in the road and potholes.
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citroenbx
Posts: 132
Joined: 25 Jul 2005, 18:14

Unread post by citroenbx »

Lots more information needed.............What is the spec of your ZX ?

Have you checked the points posted earlier ?
Does the Droning noise sound like its coming from the wheels ? Or the engine bay ?

cheers
Life feels good just as you complete No4 Glow Plug on a ZX-TD
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eskimoigloo
Posts: 41
Joined: 21 Apr 2005, 22:59

Unread post by eskimoigloo »

Almost definately your exhaust about to give up.... mine did the same, found out the clonking was that the back box wasn't attached to the middle pipe any more and was banging against it. Resonating sound is gases coming out of the crack!
Chris
2001 Xantia HDI 110, 50,000 miles
Near Beverley, E.Yorks.
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janneman63
Posts: 17
Joined: 20 Nov 2005, 09:48

Unread post by janneman63 »

eskimoigloo wrote:Almost definately your exhaust about to give up.... mine did the same, found out the clonking was that the back box wasn't attached to the middle pipe any more and was banging against it. Resonating sound is gases coming out of the crack!
Chris
Well, the "mystery noise" now has been identified in a somewhat abrupt way: The back silencer fell off whilst doing a little check-up drive around the block. :(
The weld between silencer and pipe was rusted and since I gave the back-end of my exhaust a small kick before driving, that probably was all it needed to let go of the pipe completely after it just had been "hangin' on" for a while.
So you were right "Eskimoigloo"...
Last edited by janneman63 on 20 Nov 2005, 16:42, edited 1 time in total.
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eskimoigloo
Posts: 41
Joined: 21 Apr 2005, 22:59

Unread post by eskimoigloo »

LOL I knew it!!! exactly what mine did, except i was about 2 miles from home, and the middle pipe was draging on the road!
Chris
2001 Xantia HDI 110, 50,000 miles
Near Beverley, E.Yorks.
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janneman63
Posts: 17
Joined: 20 Nov 2005, 09:48

Unread post by janneman63 »

eskimoigloo wrote:LOL I knew it!!! exactly what mine did, except i was about 2 miles from home, and the middle pipe was draging on the road!
Chris
Actually, I fell off and I drove over it...it felt like the back end of the car did a little jump when that happened! :shock:
I just hope that nothing else was damaged in that process. I tried to check it just by having a quick look underneath and everything (except for the exhaust) seems to be okey.
Fortunately I was only two minutes away from home...and the garage which I use is nearby. Let's just hope that everything that is left can hang-on for that distance (about 5 minutes drive)
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eskimoigloo
Posts: 41
Joined: 21 Apr 2005, 22:59

Unread post by eskimoigloo »

Just get them to check the manifold!
Chris.
2001 Xantia HDI 110, 50,000 miles
Near Beverley, E.Yorks.
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janneman63
Posts: 17
Joined: 20 Nov 2005, 09:48

Unread post by janneman63 »

eskimoigloo wrote:Just get them to check the manifold!
Chris.
I'll do that! Thanks!
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janneman63
Posts: 17
Joined: 20 Nov 2005, 09:48

Fixed....:))

Unread post by janneman63 »

...and the car seems like new to me! :) All the strange noises and tiny vibrations are totally gone (with the added bonus of that I can actually hear my rear loudspeakers very well now!).
Repaired free of charge because the firm I bought it from a month ago took care of that financial transaction! :))
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