Reply With Quotecould be ANYTHING. you need to do a little more research as we cant guess with a description this vague. Can you hear the noise with the hood open, what area is the sound from etc.
Major Contributor
Shaking and Clanking 95 530i
Hello,
I just purchased a 95 530i from an auction. The vehicle for the most part runs good and shifts great. However, when idling, the car starts to shake back and forth. And when accelerating the vehicle has a noticable clanking sounds seems to be coming from the engine compartment. The repetition of the sound increases, as the vehicle accelerates. I have noticed that the emission from the exhaust is visible, a cloudy white color. Any suggestions as to what I should check?
Green Beret Special Ops
could be ANYTHING. you need to do a little more research as we cant guess with a description this vague. Can you hear the noise with the hood open, what area is the sound from etc.
95 E34 530I V2.37
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Those who make peaceful revolution impossible will make violent revolution inevitable.
John F. Kennedy
Big Time Poster
A "clanking" noise usually indicates lower end issues, like bearings or something. Maybe you can take a digital sound recording of it and post it as an MP3 for us to hear.
01 740i sport
92 535i
92 525 touring
88 325ic
Major Contributor
Originally Posted by talltorontoguy
I believe I have found the issue! I took the vehicle to a bmw reapair shop and they checked the vehicle for me, and I am going to be needed a replacement catalytic converter for the drivers side... that is what's causing the rattling during accelaeration....
Big, Big Time Poster
Huh ?. cat converter insided rotted out and metal rattling in there!. This would be a first I have heard.
Big, Big Time Poster
Second now - happened on my old Volvo 240. The ceramic honeycomb broke loose and rattled around for a while. Eventually it would manage to rattle into such a position that it would block the exhaust almost completely. It LOVED to do this just as I was accelerating on an on-ramp.
It was.. um.. exciting.. to lose almost all power on a car that could barely make it to 60 in the first place..
Sounds like my 540 right now! Just this week it has started to really get loud just below the driver. Clanking at idle and a tin-can like rattling noise upon acceleration. I hope mine is not the same problem - I heard they are quite pricy. Does anyone have an idea what this would cost to repair? Or does anyone have any other idea what might make the same noise, perhaps a loose heat sheild?
I'll take it to a shop at lunch today and try to get her up on a lift and take a lookie.
-jack
Major Contributor
I had my mechanic take raise the entire vehicle. He took me under it and as he tapped on the drivers side cat, I heard the dreaded rattling noise that I hear when accelerating. I know with the 530's the OEM price for each cat is around $1200, straight from dealer, however, I did find a much more reasonable price, around $350 for a 530i, and $300 for 540i.
Here's a link for a replacement for your model. I'm jealous that yours is cheaper than mine!94-95 540i
Good Luck!
Rondell 58's|Eibach Springs|B&B Tri-Flow Exhaust|Shadowline|S/D Rotors|KYB Struts
Big, Big Time Poster
Yeah, a loose heat shield can make a very similar noise.
Easy way to find out is to, ah.. 'kick the cat'
If it makes a sort of grinding, ceramic-on-metal noise, the insides have fallen apart. Metal clanging noise? Heat shield.
I know on my car, the heat shield around the pipes that come off the manifold is barely secured and rattles a good bit.
5-10 Grand Master
I had my mechanic take raise the entire vehicle. He took me under it and as he tapped on the drivers side cat, I heard the dreaded rattling noise that I hear when accelerating. I know with the 530's the OEM price for each cat is around $1200, straight from dealer, however, I did find a much more reasonable price, around $350 for a 530i, and $300 for 540i.
Here's a link for a replacement for your model. I'm jealous that yours is cheaper than mine!
Good Luck!
Magnaflow aftermarket Cat is $80 for each, i got two for my custom exhaust on 525. Each has a 4.2L filter capacity. DONT BUY OEM!
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