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#1
05-04-2011, 09:51 PM
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Engine Knock?
Hello... I recently acquired a pretty decent 982 with a 20hp Onan. I've used it a couple of times and it ran fine, then the engine started knocking.. sounded like a rod knock to me so I pulled the motor and dropped the oil pan...well everything looked fine no loose or broken rods just a slight side to side movement where the rods connect to the crank, could this be the source of the knock?
Also pulled the heads to check for carbon buildup which looked ok just a slight deposit on the pistons and minimal on the valves..could that be the source of the knocking? I know it's hard to diagnose a problem like this without having your hands on it but any ideas on any thing else to check while i've apart would be appreciated Thanks 
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#2
05-04-2011, 10:11 PM
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Have you checked the drive shaft for play or looseness? Just a thought, I know they make that kind of a noise on QL's sometimes.
__________________
DWayne 1973: 128, ag tires, 3pt. lift, spring assist, lights, 42" Deck 10" moldboard plow 2016 XT1 42" deck 18HP
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#3
05-05-2011, 07:48 AM
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Quote:
I saw a pretty woman once----well that is off topic, Ha,LOL!
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#4
05-05-2011, 03:59 PM
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no seriously I did check for movement in the connecting rod and could not feel any movement , just that it seemed like a knock as loud as it is you would be able to detect any looseness..guess that's why i'm not a mechanic,lol so i should pull the caps off and and check the clearance? DX3, when I took the drive shaft loose to pull the engine i didn't notice any looseness but i'll check it when putting everything back together.
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