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Rod Knock

Old 31-Oct-2005, 11:01 PM
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Rod Knock

well i just recently swapped the ZC from my old hatch into my sedan, was running fine for awhile lastnight after the swap then on the way home my one plug wire came off slightly, so dennis and i stopped and put it back on then i heard a slight dreaded *knock knock knock*

i just drove it alot easier for the night, drove it to work and back in the morning, then ran to dennis's house, on my way home about 10 seconds from my house, it shuts off, restart it and the knock was considerably worse,

now, is there a way to fix rod knock as long as nothings damaged? maybe the rod cap is loose? i dunno, any ideas people?

its going in my garage tommorow night and the oil pans coming off
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Old 31-Oct-2005, 11:09 PM
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spun a bearing im assuming, beating on it??? ask blair same thing happened to him lol
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Old 31-Oct-2005, 11:11 PM
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if it is a spun bearing, how would i fix it?

i did beat on it when it was in my hatchback alot, like did about 9 - 10 passes down the track in one night, accelerate quick onto the highway etc etc,

and i did beat on it a bit lastnight, but that was just on on ramps
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Old 31-Oct-2005, 11:13 PM
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rebuild it.....in other words, not worth it. Invest in a better motor
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Old 31-Oct-2005, 11:13 PM
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i already rebuilt it last year
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Old 31-Oct-2005, 11:19 PM
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Originally posted by 1PhatCX
i already rebuilt it last year
^^that sucks.
Chances are the crank may be badly scored/gouged. It may not be re-usable again.
Time for a new motor.
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Old 31-Oct-2005, 11:24 PM
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well i know people who have spare zc's lying around and what not, grab new bearings and crank and put her together, basically all i can do at this point, i have no money for a new motor and i'm 4 grand in debt
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Old 31-Oct-2005, 11:43 PM
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Originally posted by 1PhatCX
well i know people who have spare zc's lying around and what not, grab new bearings and crank and put her together, basically all i can do at this point, i have no money for a new motor and i'm 4 grand in debt

well im not gunna lecture u but u shouldnt beat on ur car if ur poor
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Old 01-Nov-2005, 12:07 AM
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ah man....all that work and its already messed.
I would say if it was just a rod bearing you might be able to get away with re-using that engine. But if the main bearing spun the engine would need some serious machine work. And even if it was just a rod bearing the rod may have been damaged and might need to be replaced. Which sucks because that means the heads gotta come off and the pistons/rods gotta come out.
But if its not that bad you could probably find another ZC crank and get some new bearings and replace the crank with the engine in the car....although i wouldn't want to be the one doing the work it is possible.
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Old 01-Nov-2005, 08:25 AM
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yea I think that might be my only option andrew, i need this car to get back and forth to work.
i may just slap some new bearings in it, and if it cures it for awhile thats good and i can rebuild my single cam and find out why that cylinder went dead, fix it, slap on the mpfi manifold and drive that while i fix the zc properly
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Old 01-Nov-2005, 09:57 AM
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have you had a pro listen to it? maybe you should? this is something that needs to be heard to correctly diagnose.
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Old 01-Nov-2005, 10:47 AM
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but you're so far away from us steve
Derek, does it sound like all hell is breaking loose inside of your engine when you rev it from like 2500-5000rpm? Is there any metal flakes or chunks in your oil?
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Old 01-Nov-2005, 11:28 AM
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I agree with Steve, you should have a pro listen to the noise. Your problem might be simpler then you think. If it is a spun rod or crank bearing, then it is highly likely you will have severe scoring and you don't want to get into that.
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Old 01-Nov-2005, 08:21 PM
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I can tell you right away weather or not its a spun bearing, I learned from how to check when I spun a bearing in my ZC. PM me if you need anything Derek.
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Old 01-Nov-2005, 08:46 PM
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Originally posted by zeeman
but you're so far away from us steve
Derek, does it sound like all hell is breaking loose inside of your engine when you rev it from like 2500-5000rpm? Is there any metal flakes or chunks in your oil?

no metal chunks that i've seen, i'll look close when i drain the oil, but it didnt sound that bad untill lastnight when it quit then i restarted it, and i only drove it down the street the rest of the way to my house, but when its cold, you cant hear it knocking, only when it warms up when the oil gets thinner
(running 10w30)
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Old 02-Nov-2005, 12:27 AM
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lmao...look at ur own signature picture on this message board..no wonder ur engine is fuxored.....lol
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Old 02-Nov-2005, 06:51 AM
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most likly its a spun bearing if it is it isnt worth driving on it cuz your going to fu<k your crank its okay if it ware's down a little cuz you can always machine it and over size the bearings but if its over 30 tho your going to have to replace the crank
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Old 02-Nov-2005, 09:09 AM
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Originally posted by Fug
lmao...look at ur own signature picture on this message board..no wonder ur engine is fuxored.....lol
that was my old stock 1.5....
i JUST swapped my zc last weekend
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Old 02-Nov-2005, 09:12 AM
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Originally posted by dubz01si
most likly its a spun bearing if it is it isnt worth driving on it cuz your going to fu<k your crank its okay if it ware's down a little cuz you can always machine it and over size the bearings but if its over 30 tho your going to have to replace the crank
i only drove on it for a day an a half, just to mississauga and back had no problems till i got back and thats when it acted up, i just drove it to work and back the next day then had to run to 89hatchsi? 's place, but now its in my garage waiting to be worked on,

my brothers friend said it might be because i was using synthetic in it for a long time then when i did the swap into the sedan i put regular oil in, he said same thing happened to his audi, dealership put regular in and they bought him a new motor lol
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Old 02-Nov-2005, 11:13 AM
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switching oils wouldn't do it
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