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Discussion Starter · #1 ·
I have a 2002 Saab 9-3, 153K miles. Usually when I pull out from a sparking space or execute a tight turn I get a knocking sound from what sounds like the driver's side/front of the car. It's been there for years and I've had about half a dozen mechanics look at it and they have found no problems.

Ball joint boot? CV joint? Anyone have a similar problem and were able to diagnose and fix? I'd like to go into the shop and be able to provide the mechanic with a kind of road map so I'm not completely reliant on replicating a sound which often doesn't want to appear when I am in the car with a mechanic.

Thanks much in advance...
 

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Mine does the same thing. I'd wager a broken off coil on the bottom of your front springs, allowing the spring to shift in the strut spring seat. Both of mine are missing a coil and I'll get the knock from time to time. Jacking up the car and twisting the coil spring around until it finds a solid resting point in the spring seat usually quiets it down for a few months.
 

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Discussion Starter · #3 ·
Thanks for the input. My front struts were replaced in order to fix this-to no avail. Would that job include replacing the springs?

If not, sounds like there is no permanent fix to this? Just periodic tweaks? Thanks again for your help.
 

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Just for clarification, are you getting a constant knocking, like with each wheel rotation? If so I'd say CV joint. The spring shifting knock only happens once or twice per major shift of the suspension. If the springs are your issue, to permanently fix it you'd need new springs.
 

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Discussion Starter · #5 ·
Just for clarification, are you getting a constant knocking, like with each wheel rotation? If so I'd say CV joint. The spring shifting knock only happens once or twice per major shift of the suspension. If the springs are your issue, to permanently fix it you'd need new springs.
No, not constant. Only during sharp turning. Sounds like it's the spring issue then. Thanks- will approach mechanic with that. Do you know how much new springs [OEM] run? The answer to that question will determine whether or not I have an annoyance [but not really a huge problem] repaired.
 

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If it is one pop or a clunk when turning after the car has been sitting it could be the hydraulic bushing on one of the lower control arms. The bushing insert can wear out and allow the bolt to move a bit. Genuinesaab has an uprated stronger bolt that will stay put for this. I understand this is a common problem. My car does this.
 

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Discussion Starter · #7 ·
If it is one pop or a clunk when turning after the car has been sitting it could be the hydraulic bushing on one of the lower control arms. The bushing insert can wear out and allow the bolt to move a bit. Genuinesaab has an uprated stronger bolt that will stay put for this. I understand this is a common problem. My car does this.
That's a pretty good description of it. I guess I can control arm bushing to the list of suspects. I had them replaced about 4-5 years ago and, while this problem did not appear immediately after the repair, it came a couple of months after.

Sounds like a cheaper fix than the springs. I hope it's this. Are both these problems easy to diagnose for a mechanic or do I have to go to a specialist?
 

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Discussion Starter · #8 ·
If it is one pop or a clunk when turning after the car has been sitting it could be the hydraulic bushing on one of the lower control arms. The bushing insert can wear out and allow the bolt to move a bit. Genuinesaab has an uprated stronger bolt that will stay put for this. I understand this is a common problem. My car does this.
A pop or clunk after sitting is a good description. And it sounds cheaper than new spring coils? This problem appeared a few months after suspension work- new control arms/ball joint boots so it is very possible. Is this a cheaper fix than coils?

Well, I'll go into the mechanic and broach these possibilities? Do I need a Saab specialists to diagnose these or will any mechanic do?
 

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Discussion Starter · #9 ·
Squoosh:


A pop or clunk after sitting is a good description. And it sounds cheaper than new spring coils. This problem appeared a few months after suspension work- new control arms/ball joint boots so it is very possible. Is this a cheaper fix than coils?

Well, I'll go into the mechanic and broach these possibilities. Do I need a Saab specialists to diagnose these or will any mechanic do?
 
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