Why my 2006 BMW only overheats in the morning?

10

Asked by Jul 20, 2014 at 09:18 AM about the 2006 BMW 3 Series 325i Sedan RWD

Question type: Maintenance & Repair

I'm in southern California and  every
morning I drive to work.  And about 15
minutes on the freeway, the car shows
overheating and will not let me accelerate.  I
pull over and  waited for about 5 minutes
and it would drive fine after that.  It doesnt
do this any other time of the day.

Recently, the coolant symbol shows its low.
I checked the reservoir tank and filled it up
with non bmw coolant  I also noticed theres
residue of coolant around the tank where
the cap is. This morning it does it again, but
it took multiple times before it drives
normal again.

I appreciate if anyone can help me with this
issue.

5 Answers

25,645

Yes, it is an issue- if you overheat your engine you can damage it severely and that BMW engine is expensive- please try to fix whatever is wrong before this happens- check your cooling system for leaks- it also could be a bad thermostat or sensor- or, or, or , or- if you do not feel competent to maintain your BMW find a good, honest, mechanic who can do it for you- if you don't have the money to pay a good BMW mechanic, find a way to get it- or trade it in on a Toyota-

2 people found this helpful.
292,905

Jamn is right. From your post, it sounds like the expansion tank is leaking. Time for a new one. But you might have already done some damage as BMW's don't like to be overheated....http://www.e46fanatics.com/forum/showthread.php? t=878931

1 people found this helpful.
79,125

Also check for a sticking thermostat. Sounds like the thermostat is not opening fast enough when you start off cold. But after that it's fine because the engine is warm enough that the thermostat doesn't close all the way again until it sits overnight. HTH. -Jim

1 people found this helpful.
Best Answer Mark helpful
10

I appreciate the quick response everyone!! The expansion tank does show some leak at the cap area. And From all the suggestions received, could it be where the thermostat is not opening fast enough and causing the pressure to build up and the cap at the expansion tank is the weakest point causing it to leak out. Doesn't BMW have an automatic shut off so it will not allow the vehicle to accelerate? My wife has been driving like this for awhile and it shows no sign of damages. Not that I want to continue doing this but do you think further damages could occurred even if it's drive able and damages are not noticeable?

1 people found this helpful.
79,125

I wouldn't keep driving and heating it up. You run the risk of warping or cracking the head. BMWs don't like being overheated. HTH. -Jim

Your Answer:

3 Series

Looking for a Used 3 Series in your area?

CarGurus has 31,269 nationwide 3 Series listings starting at $1,250.

ZIP:

BMW 3 Series Experts

  • #1
    Tom Demyan
    Reputation
    5,840
  • #2
    Robert Charlson
    Reputation
    1,790
  • #3
    Matt Mankinen
    Reputation
    1,410
View All

Related Models For Sale

Used BMW 5 Series
404 Great Deals out of 16,465 listings starting at $2,099
Used BMW M3
21 Great Deals out of 1,484 listings starting at $6,399
Used Mercedes-Benz C-Class
669 Great Deals out of 26,273 listings starting at $1,812
Used Audi A4
232 Great Deals out of 11,098 listings starting at $500
Used Ford Mustang
262 Great Deals out of 37,615 listings starting at $1,350
Used Honda Accord
563 Great Deals out of 103,267 listings starting at $950
Used BMW 7 Series
98 Great Deals out of 4,739 listings starting at $2,399
Used BMW 6 Series
55 Great Deals out of 2,588 listings starting at $5,999
Used Mercedes-Benz E-Class
436 Great Deals out of 19,871 listings starting at $1,995
Used Dodge Charger
266 Great Deals out of 32,048 listings starting at $1,850
Used BMW X5
309 Great Deals out of 18,313 listings starting at $2,799
Used BMW 1 Series
24 Great Deals out of 884 listings starting at $4,991
Used BMW X3
180 Great Deals out of 11,764 listings starting at $1,900

Used Cars For Sale

2018 BMW 3 Series For Sale
80 Great Deals out of 8,362 listings starting at $26,276
2017 BMW 3 Series For Sale
68 Great Deals out of 1,918 listings starting at $22,876
2016 BMW 3 Series For Sale
20 Great Deals out of 933 listings starting at $15,498
2015 BMW 3 Series For Sale
213 Great Deals out of 5,068 listings starting at $11,995
2014 BMW 3 Series For Sale
91 Great Deals out of 2,028 listings starting at $9,995

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.