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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 01-28-2013, 02:36 PM
daytradeoil daytradeoil is offline
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Coolant bleeding

So ive been reading the diy and watching videos on how to bleed the coolant.

2001 525i

My heater is now only blowing hot air when set above 85.

So in the am i turned my car to the on position and both settings at 90 and the fan at the lowest setting.

Pop the hood. Unscrew the filler on exp tank and both bleeder screws.

The tstat bleeder hole shoots out (like 4inches high) coolant every 5-10secs.

Not sure what im doing wrong or what additional steps im missing...

Anyone have this problem?

Thank you
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  #2  
Old 01-28-2013, 02:38 PM
daytradeoil daytradeoil is offline
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My temp guage on the dash hasnt gone above 12 oclock.

When the problem first started my obc ambient temp was stuck at 121 degrees. And has since gone normal.

Only symptom left is no real heat at lower temps
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  #3  
Old 01-28-2013, 03:25 PM
Steve530 Steve530 is offline
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Do you hear the electric water pump running?
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  #4  
Old 01-28-2013, 04:24 PM
daytradeoil daytradeoil is offline
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Yea i hear something running. And assuming thats what was spitting out the coolant.

Cooling system overhaul 40k miles ago or so. Just hit 160k woot woot
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  #5  
Old 01-28-2013, 05:03 PM
Steve530 Steve530 is offline
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When I refilled the system after replacing the reservoir, I switched the ignition to the run position and set the heater to high. This kept the electric pump running as I topped up the coolant in the reservoir.

Maybe I just got lucky.
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  #6  
Old 01-28-2013, 05:20 PM
daytradeoil daytradeoil is offline
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Ya i did the same and opened both bleeders but i get coolant shooting out of the tstat bleeder every 5 secs even if i dont add coolant to it....

Is there that much air stuck in my system that it continuously shoots out?

Ughh

Engine is cold right now if anyone has advice
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  #7  
Old 01-28-2013, 05:26 PM
daytradeoil daytradeoil is offline
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Tried again. As soon i turned the car to the on position it shot like a fountain from the tstat bleeder
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  #8  
Old 01-28-2013, 05:49 PM
Steve530 Steve530 is offline
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Quote:
Originally Posted by daytradeoil View Post
Tried again. As soon i turned the car to the on position it shot like a fountain from the tstat bleeder
without starting the car?
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2001 530i/5 S+P CDV delete/Akebono ceramic pads
M5 SSK/RedLine MTL/M5 rear sway bar/Bilstein HD
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  #9  
Old 01-28-2013, 05:55 PM
daytradeoil daytradeoil is offline
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Correct
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  #10  
Old 01-28-2013, 06:11 PM
Steve530 Steve530 is offline
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Hmm. Never seen the coolant shoot out of the bleeder. Sounds like something is blocked.

If you close the bleeders and look into the reservoir, do you see a constant flow from the hose at the top of the reservoir?
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M5 SSK/RedLine MTL/M5 rear sway bar/Bilstein HD
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  #11  
Old 01-28-2013, 06:13 PM
daytradeoil daytradeoil is offline
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Im reading up on a bad head gasket being a possible culprit?

Ughhh. I havent overheated since ive had the car. And have done most preventative and maint work that needed to be done. I mainly neglect suspension work until it is actually needed but try to take care of the engine

Im finding other comments here and there About the coolant shooting out but to answers to it.
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  #12  
Old 01-28-2013, 06:14 PM
daytradeoil daytradeoil is offline
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Yea the piss stream at the top is streaming of the resv tsnk is a pissin
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  #13  
Old 01-28-2013, 06:26 PM
Steve530 Steve530 is offline
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Seems as though your auxiliary water pump is working. That should be pumping water to the heater core.

That leaves the heater core and the heat control valves, unless there really is a big bubble in there.

Did this problem start after you worked on the cooling system?
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  #14  
Old 01-28-2013, 06:36 PM
daytradeoil daytradeoil is offline
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No this problem started when i let my mom use my car for two days while i worked on hers.

It did have a cel p0155 when i got it back from her as well. Cleared it and it hasnt come back.

My o2 sensors have less then 30k on them.

This part of the problem? Forgot to mention it as i thought it was just o2 related
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  #15  
Old 01-28-2013, 07:03 PM
Steve530 Steve530 is offline
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No, I doubt the oxygen sensor is the problem.

The reason I asked if the problem started after a cooling system repair, is that is how air would enter the system. If you have not drained the system or had low coolant levels since the heater worked correctly, then it less likely that there is air trapped in the system.
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2001 530i/5 S+P CDV delete/Akebono ceramic pads
M5 SSK/RedLine MTL/M5 rear sway bar/Bilstein HD
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  #16  
Old 01-28-2013, 07:08 PM
daytradeoil daytradeoil is offline
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Only thing i can think of is my mechanic adding fluid when i got my oil change. He usually tops everything off.

So thats the only time it would have been touched/fluid added. And i think he did add some because he said my "coolant was low"

Outside of that overhaul was done 3+ yrs ago
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  #17  
Old 01-28-2013, 07:25 PM
Steve530 Steve530 is offline
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Yea, that sounds like you don't need to bleed the cooling system. Must be something else.

Is the temperature gauge reading normal? If it's reading cooler than normal, maybe the thermostat is stuck open and the water is just not getting hot. Are the radiator hoses hot?

Could also be the heater valve or the HVAC control panel. I don't know how you would decide which of those is a problem.
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2001 530i/5 S+P CDV delete/Akebono ceramic pads
M5 SSK/RedLine MTL/M5 rear sway bar/Bilstein HD
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  #18  
Old 01-28-2013, 07:30 PM
daytradeoil daytradeoil is offline
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Temp gauge has been normal. Always at 12 oclock. once im warmed up. I havent touched the hoses once its warmed up. So ill do that when i get home later tonight.

Well i can live with cranking up the heat a higher then before and leaving this "air pocket" alone if it poses no other issues.

I really didnt think much of the heater not being as hot. Then i came on here and read i should bleed my system. And one thing led to another.

I prefer colder temperatures. My gf on the other hand was the one that brought the temp issue to light. She uses the heater more then i do.
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  #19  
Old 01-28-2013, 07:31 PM
daytradeoil daytradeoil is offline
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Thank you by the way steve. Much appreciated
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  #20  
Old 01-28-2013, 07:37 PM
Steve530 Steve530 is offline
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You're welcome. Sorry I couldn't be more help.
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2001 530i/5 S+P CDV delete/Akebono ceramic pads
M5 SSK/RedLine MTL/M5 rear sway bar/Bilstein HD
OSRAM CBI

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  #21  
Old 01-28-2013, 07:47 PM
daytradeoil daytradeoil is offline
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Your shoulder to cry on was all i needed.

Im going to try jacking the front end up as high as possible trying it this weekend.

If that doesnt work and no one else chimes in i may start taking things apart if i have free time.
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  #22  
Old 01-28-2013, 08:01 PM
Steve530 Steve530 is offline
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Let us know when you figure it out.
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2001 530i/5 S+P CDV delete/Akebono ceramic pads
M5 SSK/RedLine MTL/M5 rear sway bar/Bilstein HD
OSRAM CBI

BMWCCA Member #337964
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  #23  
Old 01-28-2013, 10:06 PM
daytradeoil daytradeoil is offline
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Top hose is hot.

Needle never went past 12.

I tried to leave bleeder screws in but loosened and let out air bubbles that way. I then took off the screws completely and it didnt shoot out until i started to add water. So i just screwed them back in.

After doing that my heater was warm at lower temps like before.

Soooo i dunno. Its working again. May just give up and be happy with it the way she is
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