So i after i got the pulley, had to get new belts....got it installed..it ran....no gains whatsoever. just metal and shiny. it made my tensioner go bad. replaced the tensioner... 3 days ago i start the car it starts sounding funky....like when u clip a baseball card to the back of ur bicycle. Frustrated as can be "1 injector went bad last week..." I try looking to see whats wrong with it.......lift the car up....take the wheel off....the shields...and i see that my MotherF*****G pulley is cracked! so i ask for advice on what to do....only thing i can do really is replace it. So i found my oem one and got a belt for it....loosened up the idler pulley...turned the tensioner..... finally got 1 belt off.....then after struggling to get teh underdrive pulley bolt off....i got someone to come with an airgun to take it off.....the freaking pulley just fell off! On a worse note...the freaking center part of the pulley is jammed onto my crankshaft....and i cant get it off now...i tried to take a visegrip and then screwdriver behind it to pry it off....didnt work...feels almost as if its welded togehter...no play at all.....i dont know what to do anymore im soo FRUSTRATED!!!

Here is a picture of the pulley....

 

Ouch!!! That sucks. You could try a really micro lubricant to get the middle off.


Who made this one?

 

wow that's really bad. Which Brand was it?

 

20 bucks says made in china no it

 

That is going to be a tough one to take out,can you post the pics so we all can see what can be done hear. I would try to pry the damn thing with something tall and skinny to fit in there so you can try to wrench it out.

 

is the bolt out of it... if so you could try and use some heat to get it off thats if you have access to a torch sometimes we have to use torches to get stuck stuff like that off at the shop i work at..

 

looks like an obx one from ebay....just a guess though

 

WOW, cheap parts FTL.
I ran the UR pulley for years and never had any issues.

 

whatshisname had an orthodox junk his motor. On top of that none of them are a harmonic balancer, so they are all cheap peices of ****.

 

ok so i tried puttin vise grips on it and then prying it off with a screwdriver.....i think im going to have to cut into it........and take it off that way..no other choice...=/ i just need to get it to run bc im going 3.5 in the next month or 2.

 

I would look for a small pulley puller. That might get that chunk off...

 

Same here.

 

I have been running the unorthodox for probably 8 years now. No problems to speak of.

 

I would heat it a little and try to pry it again. That should do the trick!!

 

I am curious, what exactly is a harmonic balancer and how is it integrated into the stock pulley? Are there any serious adverse effects on the engine from not having a harmonic balancer?

 

if your motor aint blue printed and balanced i would have to say so...
Every time the cylinders fire, torque is imparted to the crankshaft. The crankshaft deflects under this torque, which sets up vibrations when the torque is released. At certain engine speeds the torques imparted by the cylinders are in synch with the vibrations in the crankshaft, which results in a phenomenon called resonance. This resonance causes stress beyond what the crankshaft can withstand, resulting in crankshaft failure.

To prevent this vibration, a harmonic balancer is attached to the front part of the crankshaft. The damper is composed of two elements: a mass and an energy dissipating element. The mass resists the acceleration of the vibration and the energy dissipating (rubber/clutch/fluid) element absorbs the vibrations.

 

I BELIEVE THE OEM ONE SAYS THAT IT REQUIRES YOU TO HAVE RUBBER ON THE PULLEY. THE AFTERMARKET ONES DONT....

i just realized that was all in caps lol. sorry i don wna retype it.

but...im gonna figure it out when i get the chance...for now im driving my bucket 4th gen lol


also..for those who say theyve had the pulley...was there a gain? doubt its a noticable one...thats it for now..gonna post up with updates 2m.

 

I would try to hammering on the chuck with a dead blow hammer. The non marking type and see if you can get it to virbate lose. Otherwise you may have to drop the motor to ge it lose.

evo

 

yeah man i would go that far saying underdrive pulleys are bad..i had a obx one and didnt have a problem with it at all..i think u just had sum bad like with that one man..it happens.sorry to hear about it...nothing like a bunch of car trouble lol SOO FRUSTRATING!!!

 

So what brand is it?????????? (repeat q)

 

Here's how to remove the bolt....

http://forums.maxima.org/6692250-post2229.html

 

im honestly not sure. someone sold it to me....all im saying is....DON't BUY THEM THEY DONT MAKE ANY DIFFERENCE AND ITS JUST A HEADACHE TO GET TO IT AND THE WHOLE DEAL........

this is not for the sc'd folks i dont know if it makes a bigger diff for y'all.

 

nope not for use supercharged guys at all...( loose boost )

 

I dont care how many people say theirs have not failed. I have seen enough of threads about these failing and breaking to never ever bother buying one for what tiny gain they provide. The lightweight flywheel will be plenty fine for me.

 

Was it installed correctly? Did you put a new crankshaft oil seal and the correct sized belts upon installation? I've read that you can use a gear puller to remove a crank pulley.

 

I have the UR LIGHTWEIGHT Crank Pulley.. NOT the underdrive. I got it simply because I was installing the MEVI, and thought that the pulley would make up for the slight loss in mid-range power that I was going to suffer with the MEVI. I was NOT impressed. I did not notice ANY sort of gain with it, although I havent had any problems with it either. I definately wouldnt go recommending them if you are looking for an actual gain! Now I'm crossing my fingers!

 

Our cars dont use a harmonic balancer, they use a harmonic damper. There is a difference.
http://www.atiperformanceproducts.co...mper_dinan.htm

This has been discussed many times before in regards to our cars and the pullies.
http://forums.maxima.org/140640-post3.html
http://forums.maxima.org/3515625-post24.html
http://forums.maxima.org/2907485-post10.html
http://forums.maxima.org/4381913-post24.html


However many have run the UR UDP for years without any issues to the crank from torsional vibration.

Im not sure who you were refering to having their UR UDP fail on them, Ive never seen or heard about one doing so. Maybe you can find that thread.
I do know that the issues people have had with the other UDPs were all cheaper knock offs, RVM, Motostorm, etc..

 

Only on some cars,moslty older. A lot of cars now are internally balanced at the crank.

 

right thus i said...if your motor already aint balanced and blue printed..
which some manufactures are doing and some arent,

 

Hey RuSSiAnMax415 try to use some kind of expoxy to glue the pulley back on and than try to pull it out gently .. it might work .. or even weld it just to take it out !!

 

LOL. That will definitely not work. The pulley itself is not needed to remove the bolt....

 

hell, i say just glue it back together and use it.

seriously though, pry the **** off or use a chisel and crack the damn thing. be a man.

 

Russian, did you try my suggestions in the link I provided? Any luck?

 

FleaBay Strikes Again, I would never purchase a mechanical part on that site. Speaking from Past experience. I found this on Unorthodox Racing's website I thought it backs their product with some interesting information. I've been running my UR Pulley for 30,ooo plus miles with no ill effects. Knock on wood!! :
http://www.unorthodoxracing.com/faq.aspx#section2

 

HAHAHAHA!
YES i did, i got the bolt off...then i tapped into what was left....the part that was stilll stuck on the crankshaft...it slid off...everything looked ok...so i got the stock underdrive pulley on....tightened everything.....
and believe it or not it felt like it added power!!! I couldnt believe how much faster the rpms jumped up... anyway...the car is running great again! =]


fleabay...havnt heard that one b4 haha.

 

for alll those wondering my method of solving this was tapping into what was left of the udp.......

 

I didn't mean to take out the nut I meant the for the rest of the udp ..

 

But the remaining piece of the UDP will come off once the nut is removed....

 

All motors are going to be balanced, whether its done internally or externally with a Harmonic balancer is the the thing.

 

it was stuck on the crank shaft! The rest of it was solidly stuck. and i put visegrips and tried pushing it off with a screw driver....nothin worked...so i ended up tappping into it..