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E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #1  
Old 08-22-2014, 01:13 AM
muzz90 muzz90 is offline
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Bmw e36 m52b28 engine rattle.

Hey guys. I'm new to this and have read through heaps of topics already. Real interesting things

Right, my new bmw I got last week has just started making a rattle. It sounds like it's coming from the front of the engine. When I first got the car, I didnt even know the car was idling. Now I can hear it from inside the car, not overly loud but it's noticeable.

What could it be?

Thanks guys.


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  #2  
Old 08-22-2014, 02:50 AM
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sixpot_simon sixpot_simon is offline
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At a blind guess, I'd say VANOS.

But there are many other possibilities, so it'd be worth buying a mechanics stethoscope and poking around.
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  #3  
Old 08-22-2014, 08:56 AM
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tim330i tim330i is offline
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Welcome to Bimmerfest! I've moved your question over to the E36 3 series forum, you'll get more help in here.

Good luck,
Tim
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  #4  
Old 08-22-2014, 02:17 PM
muzz90 muzz90 is offline
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Cool
Hopefully some of the guys from there can help. I took a video but wouldn't let me upload it. I'll post it through YouTube and upload a link.


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  #5  
Old 08-22-2014, 03:12 PM
muzz90 muzz90 is offline
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this is my engine and the noise. May help out.


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  #6  
Old 08-22-2014, 09:46 PM
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hornhospital hornhospital is offline
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Sure sounds like a VANOS rattle to me.
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  #7  
Old 08-23-2014, 01:06 AM
deSwede deSwede is offline
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You need to rev it a bit higher to about 2000-2500 rpm for vanos rattle to be prominent,
dosen`t sound to bad att idle,i would disconnect the accessory belt and also ac belt
and listen if the noise disappears, don`t run the engine more than a few seconds without
the belt.
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  #8  
Old 08-23-2014, 08:30 AM
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ZeGerman ZeGerman is online now
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While you don't always have to rev the engine to hear a tired VANOS rattle (if it's bad enough), I'm not convinced that this is a VANOS issue. It could be, but more investigation is needed. Purchase a mechanic's stethoscope to help you pinpoint where the noise is coming from.
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  #9  
Old 08-23-2014, 09:04 AM
deSwede deSwede is offline
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It dosen't sound like vanos rattle to me either, but may be easier to determine
if put some rev to it,might be a bad bearing in the waterpump or something else
in the belt driven accessories like power steering pump or ac clutch.
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  #10  
Old 08-23-2014, 01:33 PM
muzz90 muzz90 is offline
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I used a big screwdriver and listened to different points on the engine. Over each cylinder it's normal but over the VANOS cover it is much louder. The video made it sound much worse that it actually is. The car only has 151000km on the clock, all original too. So it's still a fresh engine by all means.
If it is the VANOS, is there a chance that it could wreck the engine if it got worse? Or what's the possibility of it being a timing chain?

Thanks
Murray




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  #11  
Old 08-24-2014, 01:17 AM
deSwede deSwede is offline
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Did you put the screwdriver on the waterpump also? m52b28 have the diaphragm
spring on the intake cam sprockets and are less prone to make VANOS rattle
than models before 1995, but i guess it's possible if very worn, the timing
chain could make some noises if tensioners and gliders is worn but not my first guess.

Maybe it's time to do the VANOS seals anyway at that milage if not done and also
the anti rattle kit from beisans at the same time.

Last edited by deSwede; 08-24-2014 at 02:41 AM.
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  #12  
Old Yesterday, 07:51 PM
muzz90 muzz90 is offline
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Bmw e36 m52b28 engine rattle.

Hey guys.
So I've nene driving carefully and not revving it high at all. And the noise from the video universe has gradually disappeared. However now when I let it idle after I give it a slight rev it settles at about 700rpm but goes down to about 500rmp over 10-15 seconds. And seems to idle pretty rough after it gets to around 500rpm.

What could be lowering those revs? Or what could be making it idle rough?

It's got a mind of it's own this engine.


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Last edited by muzz90; Yesterday at 07:59 PM.
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