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Old 09-03-2002, 10:52 AM   #1 (permalink)
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Bad ass Knock

ive got a knock comin from what sounds to be around the #7cyl area and i was just wonderin what would be the best way of findin out what the problem is, or just a general way to figure this kinda crap out.
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Old 09-03-2002, 01:57 PM   #2 (permalink)
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You can pull the plug wire off one cyl at a time while it is running to find out what cyl is affected. That will tell you if it is a rod bearing vs. a main....I believe, anyone?
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Old 09-03-2002, 02:18 PM   #3 (permalink)
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thanks, ya i just checked the main bearings and theyre all good. But i will try the spark plug thing.
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Old 09-03-2002, 02:22 PM   #4 (permalink)
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If it is an automatic it could be a busted flywheel also sinceit is at the backof the engine usuall if it is a rod it is one of the front ones(usually #3 from the ones I have seen)
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Old 09-03-2002, 02:24 PM   #5 (permalink)
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its an auto...so how could i check for that???
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Old 09-03-2002, 02:39 PM   #6 (permalink)
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could it possibly be my tranny, cuz the noise does seem to be comin for far back in the moto maybe even behind it....And does and tranny always move???, cuz if so then it may be my tranny.
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Old 09-03-2002, 07:30 PM   #7 (permalink)
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Pull the dust cover off of the bell housing then inspect the flywheel with a flahs light..Might be easier to tell if you remove the torque converter bolts.. be careful when you do though they are some times broke all the way out and will fall out when you push the torque converter back.. If it is broke Summitt sells one that is .035 thicker for about $60.00
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Old 09-03-2002, 08:07 PM   #8 (permalink)
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the tranny is moving? independantly of the block? hmm......try tightening the bellhousing bolts and see if your problem goes away......

-Scott
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Old 09-04-2002, 06:07 AM   #9 (permalink)
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Quote:
Originally posted by SCOTTS_4X
the tranny is moving? independantly of the block? hmm......try tightening the bellhousing bolts and see if your problem goes away......

-Scott
I think he is talking about the internals always rotating when the engine is running..(at least that is the way I took it)
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Old 09-04-2002, 10:52 AM   #10 (permalink)
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yup thats what i was talkin about, so the internals are always rotating? And where is the flexplate?
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Old 09-04-2002, 11:17 AM   #11 (permalink)
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Quote:
Originally posted by MOFUGRA
yup thats what i was talkin about, so the internals are always rotating? And where is the flexplate?
IS this question REAL??


Justin case here is the answer..



The "flexplate" AKA flywheel on a SBC is bolted to the crankshaft at the back of the block.. in the bell housing.. Maybe you should take your truck to a mechanic..
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Old 09-04-2002, 01:02 PM   #12 (permalink)
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I once had a flywheel (flex plate) crack because the tranny bolts loosened. Damned thing knocked to beat hell. When I finally tore it apart, there were cracks between the bolt holes and the center hole. I couldn't believe it, I looked up the noise in my Chilton's and was a disbeliever until I crawled beneath it and found the misalignment that later was proven to be the cracks.

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Old 09-04-2002, 09:20 PM   #13 (permalink)
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Quote:
Originally posted by hy_desert_4wheeler


IS this question REAL??


Ive never heard flexplate before always called it flywheel so
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Old 09-05-2002, 04:52 AM   #14 (permalink)
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Quote:
Originally posted by MOFUGRA
Ive never heard flexplate before always called it flywheel so
YOU were the FIRST one in this post to use the term FLEXPLATE.. It had been referred to as a flywheel till that point..
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