I put an aftermarket crankshaft pulley on my car and it seems to wobble at idle is this normal ? However when i open the throttle a bit it levels out. Is it not tight enough ? Is it the belt ? I had this pulley on my last motor before i did the DE-k engine swap and i dont remember this happening. Im 100% positive the pulley works on this motor. Im just curious as to why its wobbling a bit at idle. I think it may be the belt, maybe too tight ?

well i put a movie up for you guys i dont know if it will help you can kinda see it wobble a bit.

http://media.putfile.com/wobbling-crank-pulley

 

It absolutely should not wobble.
It only appears like that, it is still wobbling just as much.

 

Wobbling anything under the hood is never a good thing...

Make sure it's bolted down correctly, and you torqued it down properly. Everyone on here seems to just 'snug things down', I've yet to see anyone use a torque wrench on anything. A good $50 investment, IMHO.

 

you dont need a torque wrench for this.tighten it diwn till it doent move with a average size wrench.mark it and turn 60 degrees and ya finished

 

If something as simple as the trans pan bolts have a recommended torque spec, I highly doubt the the crankshaft pulley doesn't have one.

 

i believe the torque spec is 140. ANd i dont think its any where near that. I think its at maybe 70~80 at best ill give it a crank with my torque wrench hopefully that will fix it.

 

BUMP . What should i do about this ?

 

Check your other accessories, AC, ALT, PS, make sure they are aligned.

 

you know, a while back I remember reading about a similar situation, but his pulley was a stock one and definitely wobbled. It turned out that it was his water pump. The shaft on it was bent. I'm guessing maybe your previous pulley wobbled too, and you didn't notice it until now? Just a guess, but worth consideration.

 

The proper tightening procedure is torquing it to 29-36 lb-ft, then tightening an additional 60-66 degrees.

 

i searched a bunch of threads that all say 120~ 140 but only go up to 120 because the material is different.

 

I got that from the Factory Service Manual.

 

http://www.greghome.com/Greg's%20Garage/1999%20Nissan%20Maxima%20SE/Underdrive%20Pulley.htm

Is that just wrong? (140ft/lbs) It is from the stickies.

 

FSM > stickies.

 

That is WAY off. Agreed FSM > me.

 

any help??? I just replaced the RVM with the motostorm pulley and its still wobbling what can cause this ? Would a misfire cause the pulley to spin unevenly ?

 

I would imagine you would be throwing codes.

Did you check the waterpump alignment?

 

i have like 10 billion codes lol. Which include


0303
0201
0905
0201

 

bump to the top....

 

so figure out what they are and fix them?

 

Nothing that would cause a crank pulley vibration is likely to throw a code (unless it's REALLY off -- in which case you'll have some SERIOUS trouble).

Are you getting any coolant leaks? A bad water pump can cause a moving crank pulley. I should know....

Other than that, it might be a timing chain tensioner or tensioner guide.

 

well the motor only has 9,000 miles on it so id be surprised.. If it was anything like that. Nope theres not one leak. Oil or coolant

 

bump no one knows what it could be ?

 

Like I said... might be a timing chain tensioner or tensioner guide.

 

bump any other sugegstions

 

do u have a digi cam where u can take a 5 sec vid clip or something? i'de like to see how much its moving laterally, mine looks a tad wobbly too

 

yea i will try

 

On my 87 cavalier the pulley would wobble, i just left as is and drove of it for a couple years. Didn't seem to hurt anything.

 

somethin else came to mind, can u feel the vibration throughout the whole motor? feel like its missing or anything?

 

did you install ur belts b4 you tighten the crank pulley bolt down?

 

yes my car is misfiring... badly

 

well i put a movie up for you guys i dont know if it will help you can kinda see it wobble a bit.

http://media.putfile.com/wobbling-crank-pulley

 

Wow, that has a good bit of play.

 

Well that would be considered crankshaft runout. The specification for that according to the 2001 FSM is "< .1mm".

 

He is missing a tooth on the signal plate too.

 

so what do i do ? I dont think im missing a tooth on the signal plate i think i just chipped it :P

 

That accounts for the slight misfire, not the crank runout.

 

The only way to bring crank runout back into spec is to replace the main bearings. If that doesn't do it, the thrust bearings need to be replaced. I wouldn't worry about it too much though.