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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 09-15-2014, 12:01 PM   #1
xsxpxhx
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AC Over Heating Issue (I already checked this topic on forums with no help)

Hello Guys,

I need help from anyone please! I'll give you a quick run down. When the AC is on, my car over heats, only in hot weather only. I noticed this happens when its 85 degrees and up.

Things I have replaced to combat this issue.

Radiator
Fan Clutch
Thermostat
Coolant Flush
Radiator Flush
Air Filter

This problem still persists,however I did notice a small improvement. The car still reaches temps past the 3/4 mark and continues to climb unless i turn off the AC. This problem is just draining my pockets The Next thing I was told is to replace the Water Pump....but damn that is another arm and leg. Does anyone else have any suggestions what it can be or if this has happen to you and continues to give you a problem and how did you fix it? Thank you all!
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Old 09-16-2014, 01:45 PM   #2
xsxpxhx
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damn..no one? BUMP
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Old 09-16-2014, 02:12 PM   #3
ExcuseM3Plz
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Stupid question but did you bleed the cooling system? I'm assuming yes but I know my e36 would slightly over heat if I didn't properly bleed the system. If not waterpump sounds about right.
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Old 09-16-2014, 04:34 PM   #4
xsxpxhx
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Quote:
Originally Posted by ExcuseM3Plz View Post
Stupid question but did you bleed the cooling system? I'm assuming yes but I know my e36 would slightly over heat if I didn't properly bleed the system. If not waterpump sounds about right.
I did bleed the system. I think it is going to be the water pump. smh. I mean its the last thing right? smh
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Old 09-16-2014, 06:12 PM   #5
bobm3
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i think i can help you a little bit

I had this problem once the weather started to get in the ninties with no air flow I did these things and it help a lot
put in a
55 deg thermostat 11531417215
sport fan clutch 3 hole 11521719269s
also I put in my block engine ice it it what the guys use on the track it is like a anti-freeze but it lowers the temp of the block look on line for it name is
engine ice
put it in your block once a year it really works the other 2 things I put I got it from aa in florida speak to v he will hook you up
I think these things should solve your problem
bob
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Old 09-16-2014, 07:52 PM   #6
Teslazerok
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If your engine is still stock and it's overheating like that then something is wrong, you shouldn't need anything bob suggested unless you're modded and need higher cooling capacity.

Have you replaced the temperature sensors in the rad hose and block? They are relatively cheap.
Is the aux fan working?
Is the AC system full of refrigerant/properly working/leaking?
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Your TL is an eminently replaceable mass production inaninimate object that doesn't give a sh*t about you.

Last edited by Teslazerok; 09-16-2014 at 07:56 PM.
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Old 09-16-2014, 10:52 PM   #7
xsxpxhx
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Quote:
Originally Posted by Teslazerok View Post
If your engine is still stock and it's overheating like that then something is wrong, you shouldn't need anything bob suggested unless you're modded and need higher cooling capacity.

Have you replaced the temperature sensors in the rad hose and block? They are relatively cheap.
Is the aux fan working?
Is the AC system full of refrigerant/properly working/leaking?
my engine is stock, no mods, the aux fan is working, ill have to double check to see if anything is leaking.
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Old 09-20-2014, 10:40 PM   #8
$ilent ///M
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Have you replaced the radiator cap
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Old 09-07-2015, 05:13 PM   #9
M3HG
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What was the fix ?

Im have the same issue --- what did you end up doing and what was the fix ---cost ?
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Old 09-07-2015, 06:38 PM   #10
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I've seen someone with this issue fix it by having the a/c refrigerant refilled.

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Old 09-10-2015, 07:31 PM   #11
mzeed
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[Have you replaced the temperature sensors in the rad hose and block? They are relatively cheap.
Is the aux fan working?
[/QUOTE]


Please recheck this!!! And Rebleed the System!!!
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Old 09-10-2015, 07:42 PM   #12
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You sure your hoses aren't cracked? Mine was and it caused it to overheat.
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