need help with my 325i - BMW Forum

325i_man · 02-04-2009, 03:14 PM

i just bought a 325i about two weeks ago and fairly new to the bimmer scene. for some odd reason my heat doesnt work. when i turn the heater on for the front windsheild it seems to work fine but when i switch to any other mode the heater dosent work but it just blows air. what can the cause be for this?

Also i have another problem. does my car have automatic locks. where is the button at to open the door locks. when i use the key outside all the doors lock and unlock. when i use the trunk the doors also lock and unlock. where are the buttons to lock and unlock at in the car if there is a button. any help would be greatly appreciated.

witeshark · 02-04-2009, 03:20 PM

I'm thinking you have central locking. Without separate buttons, locking from in the car would be by using the door push-pull "button". As to the heat, one guess would be a bad heater core.

325i_man · 02-04-2009, 03:36 PM

Quote:

Originally Posted by witeshark

I'm thinking you have central locking. Without separate buttons, locking from in the car would be by using the door push-pull "button". As to the heat, one guess would be a bad heater core.

where exactly is the heating core located in the engine bay??

witeshark · 02-04-2009, 03:39 PM

I think it's generally behind the firewall in the lower dash, passenger side.

325i_man · 02-04-2009, 03:42 PM

in the lower dash of the passenger side or driver.? how would i get to it and take it off and replace with a new one.?

witeshark · 02-04-2009, 04:00 PM

Passenger side. AFAIK you need to unbolt and lift the dash and then you'll see it in what looks like a black cover or box.

martyyyn · 02-04-2009, 04:19 PM

Might be worth bleeding the system air locks are a common problem, & easy to do

regards Martin

325i_man · 02-04-2009, 04:40 PM

Quote:

Originally Posted by martyyyn

Might be worth bleeding the system air locks are a common problem, & easy to do

regards Martin

how would i bleed the system air locks??

olds72 · 02-04-2009, 07:26 PM

Quote:

Originally Posted by 325i_man

how would i bleed the system air locks??

he's not saying "system air locks" He is saying the "system can get air locks"

325i_man · 02-05-2009, 01:40 AM

Quote:

Originally Posted by olds72

he's not saying "system air locks" He is saying the "system can get air locks"

What In the world!! So how can I unlock the system then? Please anyone if you can help that would be greatly appreciated!! Even though California isn't that cold this year but i'd like to get my heat working for the early mornings when I drive to work

martyyyn · 02-05-2009, 04:25 AM

I'm guessing you have air in your cooling system, you need to properly bleed your system.

remove the cap from the expansion tank, and remove the bleeder screw which is a plastic screw to the right of the expansion tank cap. the bleeder screw looks like a plus sign and is plastic. it's maybe 1/2 inch long when removed and maybe 1/2 inch wide. just look for a screw with the cross mark or plus sign and unscrew and remove it.

turn your key on, but don't start the engine, and turn your heater temperature all the way to hot, this will open up the valve to your heater core, and also turn the fan on.

now slowly start filling your expansion tank. coolant will bubble out of the bleeder screw, keep filling the expansion tank until only coolant comes out of the bleeder screw hole, no bubbles. you will spill some coolant doing this, so put a towel under the car to minimize the mess. you can also massage your coolant hoses, trying to get all the air out of your system when doing this.

close everything up, drive the car to temperature, and repeat this process until you cannot get any more coolant into the system. some people say you can raise the front end of your car to make the job easier, but I never had to do that with my car.

Good Luck Martin

olds72 · 02-05-2009, 05:38 PM

Thanks martyyn for clearing that up!!