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#1
11-25-2007, 07:51 PM
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Knocking noise at start up.
I have a 1990 300SE and experiencing some wierd nosie while starting it up.
The moment the key is turned and the car starts to crank there is a horrible knoking sound comeing from where I think is the center console or passenger floor area. The nosie continues about 5 seconds and then just fades away. Is there a problem with the drive shaft? Transmission mounts? or something just loose? 
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#2
11-25-2007, 08:09 PM
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if it goes away as soon as the oil pressure built up i would be really concerned. otherwise it might be something hitting underneath due to a bad mount or something. you can take apart the oil filter to see if there is any metal in it but check underneath first.
george
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#3
11-27-2007, 06:39 PM
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check your smog/air pump
__________________
 91 MBZ 300SE 88 JAG XJS V12 Coupe 76 LANCIA Scorpion
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