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#1
11-03-2001, 07:47 AM
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350 SDL engine noise
My '91 350 SDL with 145K miles runs great and doesn't seem to burn very much oil. But recently I noticed a sharp knocking or cracking sound (almost like a snapping sound) coming from around the timing chain area in the front of the motor. The sound is intermittent and seems to be more prevalent with the airco on. Additionally, the sound disappears when the RPM's are increased from idle.
Is this likely the timing chain? Is this motor getting ready to let go?
__________________
'91 350SDL 165K miles Lovin' her until she blows... '01 Dodge Ram Cummins 4X4 DWR Stump pullin' beast... 
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