X over heating

[poppy400_0]

Today while driving my x the antifreeze bottle crack antifreeze went all over the place , what could of cause this? Anyway I went out and brought another bottle, I had it installed S0 far so good.now while driving I notice that my temp gauge starting rising toward the red so I quickly pull over for awhile.what could of cause this ? As I drive off the gauge is in the middle so I quickly accelerated to get home it stay cool as long as I was moving,as soon as I stop , it started to rise again. Do I tried something I turn on the heat and to my surprise the gauge went back to the middle .Can anyone help me with this problem.

[diyanich]

Probably an air in the system..I had a 3 series and the cooling system wasn't bled properly and it would go hot....as the temp sensor on the radiator was located on the top,so air would gather there and cause sensors readings to be off,so aux fan wasn't starting,never happened while moving ,but few times idling in the traffic jam.

[m5james]

Goto ww.e38.org and educate yourself on how to bleed the cooling system. You CANNOT use tapwater to top off the cooling system, only distilled water and either BMW or Zerex G05 coolant only.

Since this is happening, I can almost guarantee the rest of your cooling system components are going to start breaking as well since they're all the same plastic that your expansion tank is made out of. You'd be far better off to just replace everything in the cooling system, but it's up to you with winter coming up right around the corner.

[diyanich]

Originally Posted by m5james

Goto ww.e38.org and educate yourself on how to bleed the cooling system. You CANNOT use tapwater to top off the cooling system, only distilled water and either BMW or Zerex G05 coolant only.

Since this is happening, I can almost guarantee the rest of your cooling system components are going to start breaking as well since they're all the same plastic that your expansion tank is made out of. You'd be far better off to just replace everything in the cooling system, but it's up to you with winter coming up right around the corner.

It's a good point,I would definitely listen to m5james and go ahead with the cooling overhaul.It's gonna be less expensive than any engine involved repairs.

[poppy400_0]

Where do I bleed it from? Is it the plastic screw on the holes?also what's the procedure. Please explain

[m5james]

Hey Poppy, what part of my post didn't you understand? Did you even goto the site I suggested?

[diyanich]

Originally Posted by poppy400_0

Where do I bleed it from? Is it the plastic screw on the holes?also what's the procedure. Please explain

Yeah,there's a plastic phillips alike screw,I've never done it myself,but I think I read a couple of threads describing it.Didn't seem to be anything too complicated.Bled with the running engine until there's no bubbles(don't use as the reference,read more detailed DIY)
Good luck.

[amacman]

you want to bleed the cooling system.
top up at tank
leave filler cap off
start engine
put driver and passenger heating to highest temperature , indicated at 32 c with dual zone climate control .this fully opens heater valves , some folks just hit the max button .

rev engine to around 2500 rpm to circulate coolant , only at this rpm will you see coolant flowing across the tank fill hole .

a few minutes of this should have the system bled .

any more questions , purchase and refer to the bentley manual or take car to a mechanic .

[poppy400_0]

went to the shop today they found the problem,the auxiliary fan in the front not working. that fan cost money i price it with the dealer $629 with tax >now where is the aux fan switch located? i want to check that before i spend my money<also the fuse for that fan Thanks!!

[Naz24]

aux fan is right in front of the radiator.. i think..