Ok thanks, Maybe u can help me out ? I have a problem with my duece engine it's LDT 465 1c i have a chattering noise in the front of the motor i am wondering what it could be , i have ruled out the compressor the water pump an the generator, im thinkin it's something under the front cover like one of the nut's for the cam gear has come loose or that little idler gear at the top of the cover , i would like to talk to someone over the phone that was or still is a mechanic in the army that has been thru those motors from top to bottom , If anyone has any info PM me it would be veryy much appreciated thanks