Overheating

Asked by May 15, 2017 at 11:55 AM about the 1999 BMW 3 Series 318i

Question type: General


my bmw318i overheats and water comes out
through the water bottle lid. i cant possibly see any
leaks on radiator or any horse. thermostat was
changed recently. I have a new  raditor .can
someone help on this one.

8 Answers

1,525

The cooling system probably has an air bubble stuck in it and it needs to be bled. Look up the bleeding procedure for your car on Bimmerfest or Bimmerforums.

I checked the cooling system but it is not that. the fan is working, there is a new water bottle added in as well. The thermostat is now removed and it only heats up in traffic.

1,525

Well, if it's overheating and there is coolant coming out of the reservoir, it's definitely the cooling system. When you replaced the bottle, did you bleed it properly? Like I said, there is probably an air bubble or some type of blockage preventing coolant flow.

2 of 2 people found this helpful.

yes, Silverton radiators fitted it on and they bleed the system and checked the water flow.

1,525

Had the car been overheating for more than a minute or two at some point? How does the oil look? And the coolant too for that matter?

1,525

It could be a bad head gasket causing the excess coolant pressure.

Yes it would overheat in traffic then I had to switch it off or usually when it heats up in traffic I try to get onto a open road where i drive it at 60km/h n then the heat gauge drops back to half

1,525

Yeah, this could be a head gasket issue. Your engine has an aluminum cylinder head, and being much softer than iron, it tends to warp when it is overheated for a long period of time, which in this case could be as little as 5-10 minutes. What does your oil look like? Any chocolate milk color?

Your Answer

3 Series

Looking for a Used 3 Series in your area?

CarGurus has 31,251 nationwide 3 Series listings starting at $1,000.

ZIP:

BMW 3 Series Experts

  • #1
    Tom Demyan
    Reputation
    4,920
  • #2
    Robert Charlson
    Reputation
    1,610
  • #3
    Matt Mankinen
    Reputation
    1,240
View All

Related Models For Sale

Used BMW 5 Series
458 Great Deals out of 16,489 listings starting at $2,000
Used BMW M3
49 Great Deals out of 1,459 listings starting at $4,990
Used Mercedes-Benz C-Class
605 Great Deals out of 23,219 listings starting at $1,995
Used Audi A4
309 Great Deals out of 10,683 listings starting at $1,049
Used Ford Mustang
748 Great Deals out of 42,144 listings starting at $1,300
Used Honda Accord
1,030 Great Deals out of 61,438 listings starting at $999
Used Mercedes-Benz E-Class
444 Great Deals out of 19,512 listings starting at $1,500
Used BMW X5
403 Great Deals out of 12,940 listings starting at $2,495
Used Chevrolet Camaro
415 Great Deals out of 31,585 listings starting at $2,395
Used BMW 7 Series
164 Great Deals out of 6,003 listings starting at $2,500

Used Cars For Sale

2017 BMW 3 Series For Sale
160 Great Deals out of 8,637 listings starting at $25,429
2016 BMW 3 Series For Sale
51 Great Deals out of 1,853 listings starting at $19,500
2015 BMW 3 Series For Sale
32 Great Deals out of 1,160 listings starting at $15,995
2014 BMW 3 Series For Sale
221 Great Deals out of 5,115 listings starting at $13,315
2013 BMW 3 Series For Sale
49 Great Deals out of 1,606 listings starting at $10,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.