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93 Posts
Discussion Starter #1
hope i might find an answer to my knock/thunk here... my truck makes the the noise while idleing and while driving but with no consistancy some time it does it other times nothing and the sound does not have a pattern it may very from time as in time between thunks 30sec. to 2 min. apart. it sound like its coming from the drivers rear end of the motor. i opened the hood when i herd it and it sounded like it came from the passanger front of the motor. my desciption of this might be confusing but that is how confused i am.
 

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harley master
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496 Posts
If you can have one of the guys pull an oasis on your truck so you can see the history on it. In the meantime try to isolate it, and see if it is coming from the middle rear of the motor when it happens(I know not the easiest thing to do), but if it will do it at idle you can use a screwdriver as a stethascope to try and find it too. The longer the better in this case.
 
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