Cannot remove steering wheel after removing steering wheel nut om 1990 bmw 525i

STOP what you are doing before you damage something!! Whatever you are trying to remove is not the water pump. Neither the sparkplugs nor the "timing belt" cover needs to come off. Remove the fan belt. Remove the fan (the nut is LH thread- means it turns left to tighten and right to loosen). You will need a large wrench (32mm) availible at sears.The water pump is directly behind the fan and is held in by 4 10mm bolts.

There's trapped air in the cooling system.

• You need to remove the bleeder screw on top of the radiator when adding water to the expansion tank.
• With the engine running, pour water into the expansion tank till you see air go out through the bleeder screw's hole.
• Just keep adding water until no more air bubbles come out then just put the screw back in place.
• Then fill the expansion tank to it's normal level/line.

Have you found the fuse box, under the bonnet on LHS of vehicle?
In the lid of the fuse box it will outline which fuse controls the function.

On the 1990 model 525i (which should be similar), there is a float switch located at the bottom driver side of the radiator in the integrated overflow/fill tank just above the radiator drain. This float switch is what triggers the 'Low Coolant' indication on the dash. The electrical connector faces towards the rear of the radiator and has a rubber boot that protects it. To replace it, pull boot back, remove electrical connector, loosen and unscrew the retaining nut (accessible from underneath the car) and slide the old level switch out and install the new one in reverse.

There will be screws/bolts around the outside(under some kind of covers), holding the center section on. after you get that off there will be one nut right in the center(remove that and pull the steering wheel(most of the time you need a steering wheel puller)

You need to take the cover off in the middle. Once you do that you will see where the wheel is attatched to the column on a spline held on with a nut. Once the nut is removed you should be able to yank it off the column. If the wheel wont come off you will need a steering wheel puller. Many auto parts stores rent tools like that out for very cheap. Try Napa. Good luck!

Sorry I have not done a BMW but steering wheels usually require a puller to remove from the spline.
I have mostly worked on *** cars and the steering lock and key are removed without the steering wheel removed. The lock assembly attaches around the steering column, and is held on by some tamperproof bolts which break the hex off on installation, so you are left with round heads that look like rivets, I use a small chisel or punch to get them turning, it may be possible to drill the heads off as well, Sorry again if my info only relates to japanese cars, but hopfully I helped with the steering wheel removal.

first you need to remove the horn button use a flat screwdriver to pop it out then get the right size socket and remove the large nut you see after the horn button is removed be careful this nut will be pretty tight easier to keep the sterring wheel locked when breaking this nut loose .after you get the nut removed insert the key into the ignition and turn the key to unlock the steering wheel you will not be able to pull the steering wheel off if it is locked now you have to be careful not to hit yourself as the wheel will suddenly just come loose sometimes it will take some muscle other time will come right out but you will have to try to rock it with both hands gripping it on 2 sides rocking it back and forth and should come out

they sell steering wheel pullers at any auto parts store that simplify the task. they cost about 40.00 but also come with instructions that tell you how to do it

remove steering wheel (17mm hex nut)
remove screws from dash cluster(3 on bottom. 2 on top)
Unplug connections to cluster
Tilt towards you and pull up, and that it!
Trust me , you want to take the steering wheel off , makes the job much easier!