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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 12-10-2014, 08:15 PM
Bril Bril is offline
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Radiator Drain Plug only okay?

Hey all,

short & sweet. I have done a ton of searching & just can't locate the coolant drain plug on M52 engine for my e36 98 M3, but the the radiant drain plug is as visible as day.

I am curious to know if there are any risks of flushing the coolant via radiator drain plug only then bleeding it?

Thanks for your help
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  #2  
Old 12-10-2014, 08:42 PM
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hornhospital hornhospital is offline
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No risk other than not getting all the old coolant out. Just be sure the system is bled completely after you fill it, or it will overheat.
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  #3  
Old 12-10-2014, 10:29 PM
Bril Bril is offline
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Haha, horn, youre always there to my rescue. Cool, thanks for the information. I heard that it's it's impossible to get all old coolant out regardless, true?

Also, for the bleeding process, how many gallons over 3 do you think it'll require? Thanks Horn.
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  #4  
Old 12-10-2014, 11:50 PM
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hornhospital hornhospital is offline
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It won't even take 3. The coolant capacity of the M50/M52 is only 2.65 gallons from totally empty to full-up.

Unless you remove the engine and tear it down, no, you can't get all the coolant out....but you don't need to worry about that. Just drain and refill with plain water, run it for 5 minutes or so, drain it again (carefully! it'll be HOT water), then refill with a 50/50 mix of antifreeze and distilled water.

BTW, the name is Ken.
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Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13
buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito) 7pilot

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

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  #5  
Old 12-11-2014, 12:09 AM
Bril Bril is offline
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Very insightful, thanks Ken. Last question, when you say plain water, will a garden hose do or must I go buy more distilled?
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  #6  
Old 12-11-2014, 12:13 AM
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hornhospital hornhospital is offline
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Don't waste distilled on a flush job. Plain old tap water is fine. You're just going to drain it out in 5 minutes anyway.
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Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13
buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito) 7pilot

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

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  #7  
Old 12-11-2014, 12:29 AM
Bril Bril is offline
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Sweet, thanks a bunch Ken, you da cow, I mean man. I couldn't find out how to +1 you, not even sure if this forum supports that or not, but can't say that I didn't try. hehe
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  #8  
Old 12-11-2014, 12:33 AM
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jayjaya29 jayjaya29 is offline
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Might take 2 flushes if you're only using the rad drain plug.
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  #9  
Old 12-11-2014, 12:47 AM
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hornhospital hornhospital is offline
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True. Depends on how rusty/crudded up the system is now. If it comes out all rusty red on the first flush, do it twice.

(Thanks Jay! )
__________________
Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13
buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito) 7pilot

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

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  #10  
Old 12-11-2014, 01:09 AM
Bril Bril is offline
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Jay with the assist. Thanks guys, I am waking up De La Manana PST to do this, this will surely help make everything be that much smoother.

& Jay, I couldn't help but to notice that your tag "Come at ///M" would make a bit more sense if it were "Come at ///M3" or maybe I just don't get it haha, if that's the case please ignore me.
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  #11  
Old 12-11-2014, 10:21 AM
john kaminski john kaminski is offline
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Since you are leaving some fliud in the system by using only the drain plug, you will be leaving some mineral filled tap water in if you flush with tap water. if you are really fussy or concerned you should flush with distilled water. Myself, I just collect the water from my dehumidifier - distilled by chilled - for a free source of "pure" water. Also if you are leaving some plaim water in the system after flushing that will dilute some what the 50/50 antifreeze you refill with. Probably won't make a significant difference but if you live in a real cold climate you might just want to double check the freeze point with a tester. OK so I am a bit obsessive !
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Old 12-11-2014, 11:01 AM
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jayjaya29 jayjaya29 is offline
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Quote:
Originally Posted by Bril View Post
& Jay, I couldn't help but to notice that your tag "Come at ///M" would make a bit more sense if it were "Come at ///M3" or maybe I just don't get it haha, if that's the case please ignore me.
Sharp! Fixed.

@John, seems like Bril has his location listed as San Diego, I don't think he'll have freezing issues.
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Last edited by jayjaya29; 12-11-2014 at 11:02 AM.
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  #13  
Old 12-14-2014, 07:47 PM
john kaminski john kaminski is offline
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Right jayjaya, but some readers nordt of the boarder might.
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