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  #1  
Old 05-14-2012, 07:49 PM
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Default cavalier knocking noise, anyone help me?

Chevy Cavalier 2.4L, Weird Noise, timing chain, water pump, tensioner pully?!? - YouTube

video explains itself... it kinda just showed up one day and got real loud real fast... no warning at all, it dont go away with higher engine rpm's... idk what to do...
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Old 05-14-2012, 07:52 PM
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Do any of the pullys wiggle? If it was tensioner, It would probably wiggle, as usually there is a bearing of some sort in there. Water pump pully can do the same thing.
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Old 05-14-2012, 07:54 PM
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well i hear a vacuum leak. how does it run compared to before? does it smoke? could very well be the timing chain hitting the cover. but it seems like i can hear a bad vacuum leak. hissing sound. does it get louder with higher rpms?
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Old 05-14-2012, 08:08 PM
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2003 Cavalier Timing Chain Tick Repair - YouTube
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  #5  
Old 05-14-2012, 08:15 PM
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Quote:
Originally Posted by loudcivic View Post
well i hear a vacuum leak. how does it run compared to before? does it smoke? could very well be the timing chain hitting the cover. but it seems like i can hear a bad vacuum leak. hissing sound. does it get louder with higher rpms?
the air leak noise could be from the ram air intake

but anton does the knock get faster n louder when accelerating, i dont think our cars have rev limiters, but if u over revved for too long of a period then maybe a cracked rod?, i did it with my neon, revved to 6 grand (on accident) as i was revving to 2 grand n leaned back to check something not knowing i was revving to the moon, when cruising or idling the knock was there, while accelerating somewhat fast the knock was quieter to almost not there, then at a set speed it was back with vengence, im not trying to scare u about a rod knock, but i would rather cancel that out first, ive heard timing chain knocks on youtube n they sounded like ticks as urs is an actual knock, no oil leak or coolant leak?, my waterpump went bad n was making a little bit of noise n was leaking from the inside of the pulley, so use a pry bar or strong flat head n push on pulleys, look for wet spots
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Old 05-14-2012, 08:17 PM
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Pop the belt off and start it for a few seconds to see if its the actual motor making the noise or if its the accessories causing your issue.
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Old 05-14-2012, 08:18 PM
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Quote:
Originally Posted by loudcivic View Post
well i hear a vacuum leak. how does it run compared to before? does it smoke? could very well be the timing chain hitting the cover. but it seems like i can hear a bad vacuum leak. hissing sound. does it get louder with higher rpms?
yea, very bad vacuum leak, i cant find it... but then again i know nothing about motors... no smoke no nothing i dont lose power or anything... runs perfect IMO... just very loud noise leads me to the water pump bearing... but idk sooo sad..

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Originally Posted by Winter_C View Post
Do any of the pullys wiggle? If it was tensioner, It would probably wiggle, as usually there is a bearing of some sort in there. Water pump pully can do the same thing.
no pullys wiggle goign to take the belt off and see if it makes the noise without...
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Old 05-14-2012, 08:19 PM
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Quote:
Originally Posted by iamsonic View Post
anton if it is ur timing chain n u want a set of extra hands just let me know, if u can wait till next friday, rather than that far of a trip over night, but the 25th i can go into work at 4am n get off at 12:30pm then get up by u by around 8pm n we can get to work on it
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Old 05-14-2012, 08:21 PM
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Quote:
Originally Posted by Anton Miller View Post
yea, very bad vacuum leak, i cant find it... but then again i know nothing about motors... no smoke no nothing i dont lose power or anything... runs perfect IMO... just very loud noise leads me to the water pump bearing... but idk sooo sad..



no pullys wiggle goign to take the belt off and see if it makes the noise without...
fyi, when u pop the belt off, pry on that waterpump pulley, i know u say it doesnt wiggle, but they dont wiggle easily, mine didnt, my waterpump was only $13, so thats worth a shot to pry on n c if u can get any movement from it, just no hulk strength
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  #10  
Old 05-14-2012, 08:24 PM
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after watching ur vid again anton, i hear light grinding or screaching, heres a video that someone posted n some people have useful info when they arent bashing

Whats this grinding/rattle noise? - YouTube
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