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E34 (1989 - 1995)

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  #1  
Old 04-24-2013, 09:34 AM
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Coolant leak

Since my grandmother and her boyfriend have been in town from Germany these past few weeks, my mother has been using my car to drive to work and she lets them use hers. She came home yesterday and said that the coolant level light came on. I checked it out while they went out to eat. There was literally no antifreeze! I poured more in and saw that it was leaking . It was getting dark so I couldn't see exactly where it was coming from. All I saw what looked like the coolant splattered all over the engine. I'm assuming there may be a crack in one of the hoses. But while I'm in school right now, my grandmother's boyfriend will be checking it out. I'll update you guys when I get home.
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  #2  
Old 04-24-2013, 10:21 AM
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BMR_LVR BMR_LVR is offline
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Ouch!

I hope it is something easy to fix and I hope that she didn't let the engine overheat
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  #3  
Old 04-24-2013, 12:41 PM
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This could be a cracked hose or a fitting let go. It would have to be some sort of main vein for it to splatter over the motor.

I agree with Steve, DO NOT let it over heat. Especially those M30s (big dino motors) need to keep their cool.

I dont know about the M30s, but M50s were fitted with plastic tstat housings that would age and crack after a time (i replaced mine with aluminum premptively) which could be your issue, if it is indeed plastic. My M20, which i've found is more similar to the M30, did not have a plastic housing, so i would wager you dont, worth a check though.

Check all lines, theres way more coolant lines that just radiator to pump keep in mind. 203k mi. will take their toll on 20+ year old rubbers
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  #4  
Old 04-24-2013, 04:49 PM
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M30s have metal fittings, no crap plastic to be seen, the way it should be
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  #5  
Old 04-24-2013, 05:53 PM
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It's raining but my grandma's boyfriend checked it out and told me that the water pump needs to be replaced. Good thing they're not that expensive. Still a little skeptical about the hoses though, still going to get those checked out.
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  #6  
Old 04-24-2013, 07:33 PM
Larrick Larrick is offline
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How old is your Grand Mother?
The expression "My Grandmother's boyfriend" is just too much.
I love the idea but it just so "Modern".
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  #7  
Old 04-24-2013, 08:15 PM
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Quote:
Originally Posted by Dionte View Post
It's raining but my grandma's boyfriend checked it out and told me that the water pump needs to be replaced. Good thing they're not that expensive. Still a little skeptical about the hoses though, still going to get those checked out.
They need to come off to do the WP so ou might as well inspect them

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  #8  
Old 04-24-2013, 08:43 PM
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Quote:
Originally Posted by Larrick View Post
How old is your Grand Mother?
The expression "My Grandmother's boyfriend" is just too much.
I love the idea but it just so "Modern".
Pictures please ! (and not of the car lol).
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  #9  
Old 04-24-2013, 08:44 PM
allenbee allenbee is offline
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Quote:
Originally Posted by monsignor View Post

i dont know about the m30s, but m50s were fitted with plastic tstat housings that would age and crack after a time (i replaced mine with aluminum premptively) which could be your issue, if it is indeed plastic. My m20, which i've found is more similar to the m30, did not have a plastic housing, so i would wager you dont, worth a check though.

+1000. Plastic housing came apart in my hands last week when I replaced the tsat. Had a deep crack that would have snapped through at some point. Had been losing coolant for months slowly without knowing why. Rad pressure test was good. That's totally stopped now.

Last edited by allenbee; 04-24-2013 at 08:47 PM.
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  #10  
Old 04-25-2013, 06:57 AM
snowsled7 snowsled7 is offline
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Replace the pump, the belts and hoses, maybe the t-stat. Flush the cooling system, clean the radiator and condersor while you have the fan shroud out. This is a good opportunity to establish a baseline on your cooling system. Do as much of this as you can afford now, it will save on labor later. Cooling systems and suspension systems are the two maintenance intensive areas on these cars. A thorough service while you are in there will give you peace of mind through the summer months. As mentioned, you do NOT want to overheat it.
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  #11  
Old 04-26-2013, 12:35 AM
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Quote:
Originally Posted by Larrick View Post
How old is your Grand Mother?
The expression "My Grandmother's boyfriend" is just too much.
I love the idea but it just so "Modern".
my Great Grandmother (my moms grandmother) is still around and has a boyfriend too
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  #12  
Old 04-26-2013, 05:06 AM
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Re: Coolant leak

Quote:
Originally Posted by _Ethrty-Andy_ View Post
my Great Grandmother (my moms grandmother) is still around and has a boyfriend too
Nice :beer:

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  #13  
Old 04-26-2013, 10:20 AM
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Quote:
Originally Posted by _Ethrty-Andy_ View Post
my Great Grandmother (my moms grandmother) is still around and has a boyfriend too
crazy kiwis
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  #14  
Old 04-27-2013, 09:43 AM
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What do you guys feel is the difficulty of installing a new water pump? I cant imagine it being that difficult with the right tools & i also have the Bentley repair manual. My mother doesn't want me to mess around with it. I just wanted you guys' opinion because i feel that I'm capable of changing the water pump.
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  #15  
Old 04-27-2013, 12:18 PM
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Re: Coolant leak

You can do it , just don't let the job intimidate you . Read the Bentley and you tube + google is your friend . Note the nut for Tue fan is reverse thread

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  #16  
Old 04-28-2013, 11:01 AM
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I'm getting the water pump replaced, what brand do you guys recommend? I don't want to buy anything that wont last. Did Bosh make BMWs' water pumps as well?
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  #17  
Old 04-28-2013, 11:43 AM
allenbee allenbee is offline
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  #18  
Old 04-29-2013, 04:07 AM
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Febi Bilstein i have used in the past, always been happy with them.

If the M30 waterpump is the same setup as M10/M20/M40/M50 then its a piece of cake, only tricky bit is removing the fan clutch from the hub, and of course do that before doing anything else. you shouldnt need to remove the radiator, but seeing as you will be replacing coolant, you might as well, makes access a bit easier. rememeber to drain the block of coolant too. not sure where the plug is on an M30, I'm not overly familiar with it, but i think its under the exhaust manifold towards the firewall end
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Last edited by _Ethrty-Andy_; 04-29-2013 at 04:08 AM.
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  #19  
Old 04-29-2013, 05:44 AM
allenbee allenbee is offline
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Use the crack method to loosen the fan clutch's nut.
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  #20  
Old 04-29-2013, 09:05 AM
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Thanks, anybody else have any good/decent brands that they recommend? What should I expect to spend? I've been researching but I'm not sure what to buy.
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  #21  
Old 04-29-2013, 02:37 PM
MySatinDoll MySatinDoll is offline
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Quote:
Originally Posted by Dionte View Post
Thanks, anybody else have any good/decent brands that they recommend? What should I expect to spend? I've been researching but I'm not sure what to buy.
Go OEM or Febi. My Febi had Alpina on it.
Made me feel all warm and fuzzy to actually have a Alpina engine part.
Then I came back to earth and realized they are for all M30s. Fun while it lasted.
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  #22  
Old 05-01-2013, 06:10 AM
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Re: Coolant leak

I went on febi's website but I can't buy anything. They just give me item numbers, do you know where to buy the febi water pump?

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  #23  
Old 05-01-2013, 08:13 AM
allenbee allenbee is offline
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Use this oem supplier, composite impeller :

http://www.pelicanparts.com/More_Inf...2D%39%32%29%20
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  #24  
Old 05-01-2013, 04:33 PM
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Re: Coolant leak

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  #25  
Old 05-01-2013, 04:35 PM
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Re: Coolant leak

Few pics of the engine, not sure if you can see where some of the anti-freeze splashed over but here you go

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