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      07-19-2014, 04:32 AM   #1
Grinchxvx
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Low coolant sign then coolant splatter near expansion tank.

Yesterday I had the low coolant sign pop up so I topped off my fluid in the expansion tank and it was fine, and then today when I started the car it said low again so I turned it off and topped it off again thinking wtf. It was fine the rest of the day with no low coolant signs but when I got home my girlfriend said my car smelled weird so popped the hood and found this. Idk what to think of it. Is there a spot at the bottom of the tank that expels extra fluid out or something? It looks like it could have maybe leaked from the bleeder screw or cap but they're both tight and It wasn't doing this before. Any idea? I let the car idle and checked around with a flashlight and didn't see any spots where it was spilling out so I think it just randomly squirts out idk
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      07-19-2014, 09:34 AM   #2
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There is a drain around the lip of the filler that allows coolant to drain out the side/bottom.

Your expansion tank may have a small crack in it. A pressure check with a hand pump style tester would likely show where the issue is. This would be the first thing to check other than making sure the cap is sealing properly tightened fully.
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      07-19-2014, 12:38 PM   #3
Grinchxvx
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I think that may be what's going on because I had my girlfriend rev it while I checked around and it's not squirting out from anywhere. It looks like it just does it once then stops
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JB4 G5 W/ Intakes, VRSF DP, Custom Muffler Delete, BMS Oil Cooler Valve, Cowl Filters, Clutch Stop, B&M Short Shifter, Spec Stg 2+ Clutch W/ Oem dmfw, Vmr V710, H&R Super Sport Springs, 1M Front Bumper And Performance Side Skirts.]
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      07-19-2014, 12:39 PM   #4
Grinchxvx
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I'll try to get my hands on a pressure checker, how many psi should it hold?
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2008 Aw/Coral Red Manual 135i Coupe-
JB4 G5 W/ Intakes, VRSF DP, Custom Muffler Delete, BMS Oil Cooler Valve, Cowl Filters, Clutch Stop, B&M Short Shifter, Spec Stg 2+ Clutch W/ Oem dmfw, Vmr V710, H&R Super Sport Springs, 1M Front Bumper And Performance Side Skirts.]
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      07-20-2014, 04:47 PM   #5
Konakona
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This exact same thing happened to me a few weeks ago. Its probably a crack in your reservoir tank, warranty took care of it.
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      07-20-2014, 09:35 PM   #6
codean
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You shouldn't have to push it past 15 psi to find where the leak is.
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      07-20-2014, 10:54 PM   #7
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Similar thing happened to me. The bleed screw had perished.
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      07-21-2014, 12:02 AM   #8
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I got a new cap from the dealer since it was so cheap and It may have fixed it since I haven't had a low coolant sign today but we will see. Also I'm throwing code 2EF4 which Is something about the thermostat? Maybe this has something to do with it. My car has new thermostat and waterpump tho
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JB4 G5 W/ Intakes, VRSF DP, Custom Muffler Delete, BMS Oil Cooler Valve, Cowl Filters, Clutch Stop, B&M Short Shifter, Spec Stg 2+ Clutch W/ Oem dmfw, Vmr V710, H&R Super Sport Springs, 1M Front Bumper And Performance Side Skirts.]
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      07-21-2014, 03:33 AM   #9
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Quote:
Originally Posted by Grinchxvx View Post
I got a new cap from the dealer since it was so cheap and It may have fixed it since I haven't had a low coolant sign today but we will see. Also I'm throwing code 2EF4 which Is something about the thermostat? Maybe this has something to do with it. My car has new thermostat and waterpump tho
Sounds like a bad thermostat. Just because it's a new part doesn't mean it is a GOOD part! Drive the car and see if that code come back.

You might want to read this thread...
http://www.e90post.com/forums/showthread.php?t=647001


I hope that cap fixed your leak. But I also suspect a bad expansion tank or loose/damaged bleed screw.
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      07-21-2014, 08:49 AM   #10
Grinchxvx
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That is a possibility but wouldn't my heater not work if the thermostat was stuck open? I checked today and it worked fine.
I'll keep updating but so far no more leak
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      07-21-2014, 09:04 AM   #11
Grinchxvx
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Btw already read that thread but thanks and also the Code is still present.
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JB4 G5 W/ Intakes, VRSF DP, Custom Muffler Delete, BMS Oil Cooler Valve, Cowl Filters, Clutch Stop, B&M Short Shifter, Spec Stg 2+ Clutch W/ Oem dmfw, Vmr V710, H&R Super Sport Springs, 1M Front Bumper And Performance Side Skirts.]
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      07-22-2014, 04:55 PM   #12
Grinchxvx
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Leak came back looks like the expansion tank is next, question about bleeding system. Do I HAVE to have a battery charger when i bleed or can I do it with no charger and turn everything off?
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JB4 G5 W/ Intakes, VRSF DP, Custom Muffler Delete, BMS Oil Cooler Valve, Cowl Filters, Clutch Stop, B&M Short Shifter, Spec Stg 2+ Clutch W/ Oem dmfw, Vmr V710, H&R Super Sport Springs, 1M Front Bumper And Performance Side Skirts.]
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      07-22-2014, 05:53 PM   #13
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Quote:
Originally Posted by Grinchxvx View Post
Leak came back looks like the expansion tank is next, question about bleeding system. Do I HAVE to have a battery charger when i bleed or can I do it with no charger and turn everything off?
It would be better to use a battery charger, but you probably could bleed the system without one. A leaking expansion tank still doesn't explain that thermostat code. ?
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      07-22-2014, 08:45 PM   #14
Grinchxvx
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Quote:
Originally Posted by Dackelone
Quote:
Originally Posted by Grinchxvx View Post
Leak came back looks like the expansion tank is next, question about bleeding system. Do I HAVE to have a battery charger when i bleed or can I do it with no charger and turn everything off?
It would be better to use a battery charger, but you probably could bleed the system without one. A leaking expansion tank still doesn't explain that thermostat code. ?
Yeah I know I talked to my tech who does the warranty work and he said to take care of the leak first and to reset the code because maybe air got into the system? I'm going to try that and if it doesn't work then I'll take it in.
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