My car is up on jack stands right now. I am trying to change my diff fluid for the first time and my fill bolt is really tight. I tried pulling on the wrench with both hands, pushing with my foot, tapping with a hammer. HOW CAN I LOOSEN IT? Thanks

 

Tap it with a bigger hammer. Don't hurt yourself.

 

Get a longer wrench or put a pipe over the handle to extend it. You need more leverage.

 

Did you make sure you're turning it the right way, it could be that you're tightening them instead of loosening them? Hope that helps.

-Johnny

 

Make sure you have the proper sized wrench (23mm) and better to have a closed end type (with lots of points to bite). The bolt is most likely stuck on by metal to metal adhesion (or corrosion). Make sure your car is solid. You will need to use a powerful and sudden SNAPPING force to break it free so the extension will help. A gradual and increasing kind of force will increase your chances of rounding off that bolt head. Wear gloves to save the knuckles. Once it snaps, you will be able to unscrew it by hand. REMEMBER - counterclockwise to unscrew.
Next time, do this job after the diff is heated up from driving around for a while. You should do this anyway to help the fluid fall out more completely.

 

[QUOTE]Originally posted by xviper
[B]Make sure you have the proper sized wrench (23mm) and better to have a closed end type (with lots of points to bite).

 

Sorry to hear that this is so problematic. Your dealer tech may also have to do it manually as I don't think an air tool will fit in there. Who did the fluid last time? Or is this the first time? The last person may have neglected to install the plug with the washer. This washer can fall off unnoticed and the person doing the job may never know that there ever was one. This would make the bolt seize up even worse.

 

This is my first time. I am nowhere near the reccomended milage/timeframe for changing the diff fluid (I have 15k) , but I have autocrossed a few times, so I decided to be nice to my car and change it.

 

Xviper

Do you think something like Liquid Wrench would help?

 

You know, it wouldn't hurt. Squirt an ample amount all over that bolt and wait till morning to see if it penetrates to some degree. Wipe off the bolt head so the wrench won't slip and try again. I have never had a bolt or screw that was so troublesome as what has been described here.