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bought a motor that has a knock..need help?

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Old 09-25-2008, 01:21 AM
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blk89lx
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Default bought a motor that has a knock..need help?

ok i i just picked up a complete 306 eagle crank forged pistons windsor jr heads rockers the whole 9 for 150 bucks. guy said motor ran mint but had a noise like a rocker noise or a rod. i know my way around motors well but never took a bottom end apart. what should i do to see if the bottem end is in good shape? what should i look for when i disassemble?
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Old 09-25-2008, 02:29 AM
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mattdel
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ask for more details about the knock.
when it happens, what kind of throttle, etc..
my motor has a bad wristpin that sounds like a wicked crank knock, but you know its a wristpin because it only makes the knock during constant speed.
accel and decel, its gone.
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Old 09-25-2008, 02:44 AM
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blk89lx
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yeah idk all he said was it started to make a noise he dosent know if its a rocker noise or a rod.
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Old 09-25-2008, 03:01 AM
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mstngsule68
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rocker wont make a lound bang noise fyi, best thing to do is take a video and put it up
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Old 09-25-2008, 03:03 AM
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blk89lx
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im not gunna go through the process of dropping the motor in my car to start it and listen for a noise then pull it back out again. id rather take it apart and see if there is anything wrong by looking at it
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Old 09-25-2008, 03:08 AM
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blk89lx
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the motor came with windsor jr heads. are they worth keeping or should i sell them for afr or tw's?
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Old 09-25-2008, 03:41 AM
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crusin92red5.0
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take the motor a part and look for any worn bearings and such. if you don't visable see anything you might want to take the rods and pistons to a shop so they can "shop ping" them. i think thats whats it called. its been a long night of drinking FTW
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Old 09-25-2008, 06:42 AM
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mjr46
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simply put pull the pan and remove main bearing caps and rod bearing caps and inspect all bearings you need not worry about any preexisting info, a knock is a knock, when it occured or how is a mute point now, what's done is done, so inspect the bearings first and go from there
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