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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E36 (1991 - 1999)

E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #1  
Old 07-28-2010, 11:52 AM
redhead3391 redhead3391 is offline
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Overheating

I have a 1996 318i convertible, it keeps overheating at low speeds but runs fine in normal driving conditions. Where do I start looking in order to fix this problem?
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  #2  
Old 07-28-2010, 12:07 PM
Eight Thirty Eight Thirty is offline
nothing.
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air in your cooling system


Search hwo to bleed it


And for fcuking sake these overheating threads need to end
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  #3  
Old 07-28-2010, 12:11 PM
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i might make one


op it could also be your waterpump...

when is the last time it was replaced?
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  #4  
Old 07-28-2010, 12:12 PM
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  #5  
Old 07-28-2010, 12:17 PM
Theo podges Theo podges is offline
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I will start with the fan. The reason I think so is because there isn't enough air coming through the radiator when you are driving slow, the fan is suppose to make up for the airflow and it doesn't. Hope this will help.
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  #6  
Old 07-28-2010, 12:21 PM
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^ same thing i was about to say. +1 on the fan.


Quote:
Originally Posted by Eight Thirty View Post

And for fcuking sake these overheating threads need to end
As soon as the overheating ends, the threads will too. Which is never.
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Last edited by BimmerBling; 07-28-2010 at 12:22 PM.
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  #7  
Old 07-28-2010, 03:03 PM
Chris S Chris S is offline
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+1 fan
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  #8  
Old 07-28-2010, 03:07 PM
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  #9  
Old 07-28-2010, 03:13 PM
redhead3391 redhead3391 is offline
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Thank you for the suggestions...... cause I was thinking thermostat?
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  #10  
Old 07-28-2010, 04:14 PM
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no, not a typical stat issue. more along the lines of a fan/fan clutch issue.


df



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  #11  
Old 07-29-2010, 06:58 AM
injunmort injunmort is offline
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you guys put too much emphasis on fan/fanclutch. the fan does very little in the way of cooling at slow speeds and actually hinders air flow at driving speeds. if it is turning it is doing what it is supposed to. bleed the system and check for leaks and good coolant flow. leave the fan alone.
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  #12  
Old 07-29-2010, 08:30 AM
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Quote:
Originally Posted by injunmort View Post
you guys put too much emphasis on fan/fanclutch. the fan does very little in the way of cooling at slow speeds and actually hinders air flow at driving speeds. if it is turning it is doing what it is supposed to. bleed the system and check for leaks and good coolant flow. leave the fan alone.
not true.

when the car is hot roll up a newspaper and stick it in the fan. if you can stop it then you probably got a problem with fan clutch/fan. usually you'll have a overheating mostly when stopped or going very slow like in traffic. we just did my friends on his m3, with a newpaper we could stop his fan like nothing, we come over to my car and the fan would nearly eat the newspaper.


if you overheat at low speeds it could be your fan clutch/fan or your system needs to be properly flushed and filled.
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  #13  
Old 07-29-2010, 10:47 AM
injunmort injunmort is offline
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see what i said about the fan turning. it is to provide a small displacement of air thru the radiator where there would normally only be covection, eg a standstill. if the fan is turning it is doing its job. what else did you replace on this m3 that stopped the low speed overheat, because if it took a rolled up newspaper to stop the fan, the fan was not the problem.
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  #14  
Old 07-30-2010, 07:59 PM
diego652 diego652 is offline
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same thing used to happen with my car at low or standstill it got hot, so i checked the auxiliary fan turns out a fuse was blown i think its number 32. anyway once i replaced the fuse the thing is back to normal.
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  #15  
Old 07-30-2010, 08:10 PM
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Quote:
Originally Posted by injunmort View Post
see what i said about the fan turning. it is to provide a small displacement of air thru the radiator where there would normally only be covection, eg a standstill. if the fan is turning it is doing its job. what else did you replace on this m3 that stopped the low speed overheat, because if it took a rolled up newspaper to stop the fan, the fan was not the problem.
Your logic makes no sense.
If a fan can be stopped by a newspaper its not working correctly, meaning it needs to be fixed. Period.
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  #16  
Old 07-30-2010, 10:44 PM
sethum sethum is offline
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Quote:
Originally Posted by BimmerBling View Post
Your logic makes no sense.
If a fan can be stopped by a newspaper its not working correctly, meaning it needs to be fixed. Period.
i can stop my fan with a rag and my hand and i dont overheat.
and its 100 degree weather right now.
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  #17  
Old 07-30-2010, 11:09 PM
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Just because you dont overheat, doesnt mean the fan is working properly.
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  #18  
Old 07-31-2010, 02:41 AM
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Quote:
Originally Posted by injunmort View Post
you guys put too much emphasis on fan/fanclutch. the fan does very little in the way of cooling at slow speeds and actually hinders air flow at driving speeds. if it is turning it is doing what it is supposed to. bleed the system and check for leaks and good coolant flow. leave the fan alone.
Misinformation.

Check your facts. If you don't know them, please take the few seconds to mention that your post is conjecture or speculation.

Quote:
Originally Posted by e36mike View Post
not true.

when the car is hot roll up a newspaper and stick it in the fan. if you can stop it then you probably got a problem with fan clutch/fan. usually you'll have a overheating mostly when stopped or going very slow like in traffic. we just did my friends on his m3, with a newpaper we could stop his fan like nothing, we come over to my car and the fan would nearly eat the newspaper.


if you overheat at low speeds it could be your fan clutch/fan or your system needs to be properly flushed and filled.
Truth.

Quote:
Originally Posted by injunmort View Post
see what i said about the fan turning. it is to provide a small displacement of air thru the radiator where there would normally only be covection, eg a standstill. if the fan is turning it is doing its job. what else did you replace on this m3 that stopped the low speed overheat, because if it took a rolled up newspaper to stop the fan, the fan was not the problem.
Wow. Just wow.

Quote:
Originally Posted by BimmerBling View Post
Your logic makes no sense.
If a fan can be stopped by a newspaper its not working correctly, meaning it needs to be fixed. Period.
Truth.

Quote:
Originally Posted by sethum View Post
i can stop my fan with a rag and my hand and i dont overheat.
and its 100 degree weather right now.
Then you are simply lucky. Your fan isn't working. Period.

Quote:
Originally Posted by BimmerBling View Post
Just because you dont overheat, doesnt mean the fan is working properly.
Thank you Mark. Someone here has a clue what they are talking about.
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  #19  
Old 07-31-2010, 10:05 AM
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  #20  
Old 07-31-2010, 01:40 PM
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BimmerBling BimmerBling is offline
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Quote:
Originally Posted by jonesin View Post
Misinformation.

Check your facts. If you don't know them, please take the few seconds to mention that your post is conjecture or speculation.



Truth.



Wow. Just wow.



Truth.



Then you are simply lucky. Your fan isn't working. Period.



Thank you Mark. Someone here has a clue what they are talking about.
Thanks for backing me up Ed. I really appreciate it.
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  #21  
Old 07-31-2010, 01:51 PM
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wag-zhp wag-zhp is online now
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Quote:
Originally Posted by jonesin View Post
Misinformation.

Check your facts. If you don't know them, please take the few seconds to mention that your post is conjecture or speculation.



Truth.



Wow. Just wow.



Truth.



Then you are simply lucky. Your fan isn't working. Period.



Thank you Mark. Someone here has a clue what they are talking about.
+2

Here are the basics:

Overheating at slow speed only = not enough airflow through the radiator, which = fan clutch or aux fan problem.

Overheating at 20+ mph = bad waterpump or blockage in cooling system (possible bad thermostat, or other obstruction).

Sporadic overheating = air trapped in the cooling system.
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  #22  
Old 07-31-2010, 07:31 PM
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Quote:
Originally Posted by wag-zhp View Post
+2

Here are the basics:

Overheating at slow speed or idle = not enough airflow through the radiator, which = fan clutch or aux fan problem.

Overheating at 20+ mph = bad waterpump or blockage in cooling system (possible bad thermostat, or other obstruction).

Sporadic overheating = air trapped in the cooling system.
Fixed?.
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  #23  
Old 07-31-2010, 07:50 PM
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Quote:
Originally Posted by BimmerBling View Post
Fixed?.
not if it's still overheating......oh, sorry, you, uh,...meant the post.....






df
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  #24  
Old 07-31-2010, 08:48 PM
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Fixed?.
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  #25  
Old 08-01-2010, 12:18 AM
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Quote:
Originally Posted by drivinfaster View Post
not if it's still overheating......oh, sorry, you, uh,...meant the post.....






df
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