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crank pulley chatter

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Old Aug 2, 2004 | 02:18 PM
  #1  
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Default crank pulley chatter

i am having a chattering noise that sounds low like the serpintine crank pulley... when i rev the motor the pulley moves away from the motor about an 1/16 of an inch...
i can also move the pulley with a flat head screw driver about an 1/8th of an inch using the a/c pulley as leverage...
is it supposed to move?

the chattering sounded like a water pump, and i stumbled across the crank pulley movement while looking for the source of the noise.

see pics

in my next post
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Old Aug 2, 2004 | 03:08 PM
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I can't see the pics. I don't really want to register. But you might be the only recorded case of someone that owns a crankwalked civic. The crank is not supposed to move laterally, and that's a sign that the crankshaft thrust bearings are gone. If that is the problem, they can be replaced without disassembling the whole shortblock... just by pulling the #3 crank cap... but if your thrust bearing is worn out, I wouldn't do that unless you just plan to sell it. It needs a full rebuild.

Crankwalk is caused by 1) poor lubrication 2) neglecting maintenance 3) sitting at stop lights idling with the clutch pedal pushed in 4) cold start friction (another kind of oil problem) 5) racing clutches with extremely heavy-duty pressure plates.

Is your car a manual transmission car?
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Old Aug 2, 2004 | 03:09 PM
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Originally Posted by geldingmakr
is it supposed to move?
Absolutely not! Check the crank pulley bolt for proper torque.

The picture page you linked to requires registration. Attach them here.
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Old Aug 2, 2004 | 03:25 PM
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Ya... do what Kai said. I overlooked the fact that it's supposed to be bolted insanely tight to the crankshaft.
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Old Aug 2, 2004 | 04:25 PM
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it is a standard... the guy i bought the car off of a month ago said that it had a center force clutch... but i have already found things he has lied about
so i am no sure about anything on this car... i am tracking down multiple problems that may or may not be linked...
i feel like it is the pulley moving seperatly from the crank.. but i am
not sure... but the bottom gear for the timing belt is not moving out with it
as seen in these pics
Attached Images
File Type: jpg
civic_crank_pulley 004.jpg (417.5 KB, 87 views)
File Type: jpg
civic_crank_pulley 005.jpg (381.0 KB, 77 views)
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Old Aug 2, 2004 | 06:50 PM
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it feels springy
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Old Aug 3, 2004 | 01:06 AM
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Originally Posted by geldingmakr
it feels springy
What is "it?"
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Old Aug 3, 2004 | 05:03 AM
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the "it" was the pulley... when i move with the screw driver it springs back
to it's spot..

i know now it is not crank walk.

the pulley and balancer are loose.... this morning with the AC on got a
battery light on the dash, and only 10 volts on the gauge. so i got out to look at it...

The AC belt, and crank pulley, and alternator were all turning very slow...
but the engine was turning 1400 rpm

the bolt in the middle of the crank pulley was spinning as fast as the motor...


i shut it off, and i could spin the AC belt and in turn the crank pulley and alternator by hand... and timing gear never moved...the belts are tight,
and not slipping all the pulleys were turning.


how is this possible? that bolt should never come loose... and the harmonic balancer must have lost it's key...and now the crank-snout may be ruined...

i am at a loss on this car! i may have to just give up on it and learn the expensive lesson... i can't afford to do major engine work (swap) for about 15 months...

maybe i should store it until then.
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Old Aug 3, 2004 | 05:59 AM
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Originally Posted by Jafro
I can't see the pics. I don't really want to register. But you might be the only recorded case of someone that owns a crankwalked civic. The crank is not supposed to move laterally, and that's a sign that the crankshaft thrust bearings are gone. If that is the problem, they can be replaced without disassembling the whole shortblock... just by pulling the #3 crank cap... but if your thrust bearing is worn out, I wouldn't do that unless you just plan to sell it. It needs a full rebuild.

Crankwalk is caused by 1) poor lubrication 2) neglecting maintenance 3) sitting at stop lights idling with the clutch pedal pushed in 4) cold start friction (another kind of oil problem) 5) racing clutches with extremely heavy-duty pressure plates.

Is your car a manual transmission car?
why the heck is idling with the clutch pedal pushed in bad? I mean, how long are we talking about? there are times that i'll stop and leave the clutch in, because i think the light is about to turn green.
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Old Aug 3, 2004 | 06:02 AM
  #10  
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and what are the symptoms of this? drivablility wise, if it was crankwalk?
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