im trying to change my crank pulley and i cant get the bolt off . me and my buddy used a breaker bar with a pipe trying to get it off and actually cracked the impact socket trying to get it off. tryed the starter bump trick didnt work. any suggestions? also need a good way to lock up the crank so its dosent move while trying to get the bolt off . please help lol

 

That bolt can be tricky. The easiest and safest route would be an impact wrench. I've used a big *** Snap-On gun that barely got it off so you might want to have a shop loosen the bolt for you. If you want to keep trying:

Is your car an auto or manual trans?

If its a 5spd, put it in gear, have someone hold the brakes. Then you can go nuts with a good socket, breaker bar, and cheater pipe for leverage.

Autos will need the flywheel locked with a tool, not a screw driver or something rigged. You'll want it bolted and held firmly. You can get to the teeth of the flywheel from the access hole in the lower oil pan, or from removing the starter.

 

I have an auto. We got the New pulley from a junkyard (I know bad idea) but it was cheap. In the junkyard we took off the oil pan and stuck a screw driver up into the crankshaft to stop it from rotating and the pulley blot came off with out to Mich effort. Is that safe to do to my car?

 

I wonder if this would work for you?
http://www.summitracing.com/parts/li...FVKUfgodqKEA1g

I've jammed big objects in there in the past, but didn't feel too good about it. I plan to buy this tool for the next time I have to replace a crank pulley on an auto.

 

Have you seen this thread? Take a look at my posts and comments about the starter trick and a slight bit of clearance. Its not for the faint of heart -- but it has worked multiple times for me on different types of Nissan engines.

https://maxima.org/forums/4th-genera...ken-apart.html

 

A good impact gun is your best friend.

 

Thanks guys I appreciate the help. I'll let you know if it works or not

 

I like this idea.
I am about to tackle this on an auto and a manual.
Anyone confirm that this tool will work on ours?

 

Yea let me know to. Iv heard a bunch of horror story's about getting this as Damn bolt off.

 

I had trouble removing the pulley bolt as well. The trick is to give the breaker bar some room to spin, and a nice, solid socket. You need some momentum from the engine (turned by the starter, of course) to break that bolt loose. Don't forget to unplug the fuel pump fuse (relay?) and burn out the fuel before doing this!


Here's a gif of my success:


Video:
http://tinypic.com/player.php?v=dtqbm&s=8

 

Yeah, that's what CS AR was explaining in post #5.
IMO, I would have just blipped the starter, just enough to bust the nut loose. It seems you actually started the vehicle in your gif.

 

I would suggest getting as close to the frame as possible so you don't come off the bolt or break your breaker bar! It will still break it loose without a Big WHACK!!!!!!

 

This makes no sense to me...

 

Hopefully giving it a crack today. Got a New impact socket. I'm gonna try locking of the fly wheel and getting it off that way first. If that dosnt work I'm just gonna set the car on fire and call my insurance company lol jk

 

Hey guys where exactly is that access hole to get to the clutch

 

So I got the pulley locked up and goto to cranking on it with the breaker bar and this was the result

 

This bolt is the ****ing devil lol

 

Yeah, that can happen. It's best to not use an adapter.

Breaker bar-->socket. That's it.

On jobs like these, I use my Craftsman tools, so if it breaks, I can get a new one for free. I suppose Harbor Freight tools would work the same as I believe they have a lifetime warranty on hand tools as well.

 

For $12.99 at Harbor Freight you can get the following breaker bar.

I've removed crankshaft pulleys on Nissan V8s and V6s roughly 5 times total..

 

Sorry it doesn't! All it needs to do is rotate the dampner, upon bumping the starter! I've actually held the breaker bar against the frame and squeezed the remote starter trigger myself....it's less impact on your tool...that's all I'm saying! Less impact...less mishaps...less damage...too manage!!!!

 

Thank you to all. I finally conquered the devil bolt lol bought the rite impact socket to go on the end of the breaker bar,clamped vice grip pliers to the rim of the pulley and with my full body weight pulling on it I finally herd that magical pop lol. Now to get the stripped nut of the tensioner pulley and I can have my car back

 

I used a cheater bar and had a buddy lock flywheel with a crowbar. Broke the first ratchet n it swing back n punctured oil filter

 

Damn lol that sucks. I think what got it loose the most was I proped the breaker bar against the concrete floor while it was on the bolt. And slowly lowered the car with my Jack. Put a lot of the cars weight on it

 

So got crank pulley torqued on belts back on drove around the block and now when I turn the wheel a good amount either way the power steering Belt I believe starts chirping- _-

 

Fixed it. Thanks everybody for the help

 

Just a tensioner adjustment?

 

try a strap wrench. worked for me

 

Yea it wasn't adjusted rite . Took a little tweaking but it's running solid now