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Old 06-24-2012, 02:04 PM   #1
jazminnicole88

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Unhappy overheating!!!!!

Helllllpppp! I just put a new radiator in my 96 328i. And now its overheating , I drove to work and put it in park, turned the car off and my radiator house popped off with a big boom! Coolant was everywhere! Please help
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Old 06-24-2012, 06:23 PM   #2
DEATH2000
 
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When you put in the new rad did you bleed the coolant thoroughly?

Is the rest of the coolant system still original? Make sure you check your thermostat and thermostat housing, water pump, and coolant expansion tank. Its possible that your thermostat has failed, or your water pump has failed. Pre 97 E36's had plastic impeller water pumps that were prone to failure.
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Old 06-24-2012, 08:40 PM   #3
jazminnicole88

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I don't think so, does anyone have a picture of where to bleed it from? Or how to make sure I do it right, pleaseeeeee
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Old 06-24-2012, 09:32 PM   #4
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The bleed screw is located right next to the rad cap.

1) Using ramps or a jack get the front of the car 1' or more higher than
the rear. That will make the radiator and bleed screw the highest point
on the engine and facilitate removal of air.

2) With the bleed screw open, add coolant until no more air comes out of
the bleed.

3) Leave the filler cap off, or at least loose, and set the heat for max
temp and fan speed. Leaving the cap loose will prevent air that's still
in the system from causing a "coolant fountain" once the engine heats
up. Start the engine and allow it to warm up to operating temp. As it
warms up occasionally crack the bleed screw to release any air and top
up the coolant as necessary.

4) Once the engine is at temp bring it up to 2000-2500 for a few seconds
several times. Then crack the bleed until no more air is released. At
this point the heater should be throwing lots of hot air, which
indicates that the heater core is filled with coolant. You may have to
repeat this a few times to get all the air out.

5) Drive the car a bit, allow it to cool back down, and recheck the
bleed for air. Over the next few days you may get very small amounts (a
few bubbles) of air out of the bleed screw.
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Old 06-26-2012, 10:10 AM   #5
jazminnicole88

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I was bleeding it for like two hours.air was still coming out I decided to call it a night the heat didn't get real hot so I'm assuming I just need to keep bleeding it I think their may be an air pockets somewhere?....
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Old 06-26-2012, 11:00 AM   #6
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Two hours? And their was still noticeable air bubbles coming out? Feel the coolant hoses. The bottom one should be cool as it goes to the engine and the top one will be warm. You'll also be able to feel if theirs coolant in the hoses.
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Old 06-26-2012, 01:33 PM   #7
jazminnicole88

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I just went to tale a look today and the coolant reservoir was empty so I filled did everything right drove it around the block and it started overheating again..... Im taking it to a shop I have to leave it overnight ..... I don't get it uhhh maybe if I bled it right the first time...thanks for all your help I hope its not too much to fix whatever is wrong. :/ I love the wayit drives, it may be time to get another plus the side passenger is in pretty bad condition from a wipe outof the previous owners..
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Old 06-26-2012, 01:44 PM   #8
DEATH2000
 
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Overheating issues are usually pretty easy to fix. But since you said the reservoir was empty you should check your oil. Check the color and make sure it actually looks like oil. Of it looks milky brown like coffee with cream in it then that is an indicator of a blown headgasket. When you first noticed it overheating did the temp climb into the red? And if so for how long?
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Old 06-26-2012, 01:50 PM   #9
jazminnicole88

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Yes it did and for about 5-10 minutes..... We thought it may have been been a broken temp reading because it happened so fast but I guess not....
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Old 06-26-2012, 02:43 PM   #10
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Well the reason it's over heatig may not be because of bleeding it. These engines, although very well built have an aluminum alloy head that doesn't like heat very much. It's very possible that you blew your headgasket. As I previously mentioned check your oil. When coolant and oil mix it turns milky brown. It's quiet noticeable.

A headgasket itself is $75. It's the labour involved that makes it expensive. Most places will har the head sent out to be inspected for cracks and machined if nessecary. it's DIY-able but you need to rent the BMW camshaft tool.
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Old 06-26-2012, 03:26 PM   #11
jazminnicole88

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I see, I never really understood what a head gasket is, I just had the car picked up and I bet that's what it is... How do you know so much?! Thank you for everythingnpw I just gotta wait it out....
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Old 06-26-2012, 08:52 PM   #12
DEATH2000
 
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The "head" is the part on top of where the pistons are. Their is a gasket between the two. Too much heat and it can blow. The head contains the valves, camshafts, spark plugs. It's we're the air fuel mixture goes into the engine.

I've owned my E36 since May 2005. After a while you learn a few things
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Old 06-26-2012, 09:28 PM   #13
jazminnicole88

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What year is it?
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Old 06-27-2012, 02:26 AM   #14
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Mine is a 1998. Production date of 1998/02/02.
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