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

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

20,545

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 out of 2 people think this is helpful.
217,765

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 out of 1 people think this is helpful.
59,175

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 out of 1 people think this is helpful.
Best Answer
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 out of 1 people think this is helpful.
59,175

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

Add photo

Related Questions

  • BMW Mystery??? 2001 BMW 325i 2 answers

    I have a BMW 2001 325i with 210K. The other morning, my Trans warning icon came on when I went into DRIVE. I slowly drove the car to a local mechanic. He said there was a leak in the cooling syst...

    2001 BMW 3 Series 325i

    -

    Maintenance & Repair

  • every morning when i turn on my car there is a tapping noise, once it warms up it stops. what could this be? 15 answers

    ever morning when i go down to start my car their is a tapping noise it last about 5-10 min till the car warms up. why is this? is this serious? how much will it be to fix? car is good condition. ...

    1989 BMW 3 Series 318is

    -

    Maintenance & Repair

  • 2006 325i problems 2 answers

    car will start in the morning or any time it has been sitting. If you drive it, then turn it off, and then try to start it up in the next few minutes, it will not start. You can turn the key, it wil...

    2006 BMW 3 Series 325i

    -

    Maintenance & Repair

  • Cold start problem 5 answers

    Why does my BMW 93/4 320 24 valve refuse to start on really cold mornings but is OK when warm? The immobiliser has been removed so it's not that.

    1993 BMW 3 Series

    -

    Maintenance & Repair

  • Why the fuck does it keep kicking me out of BMW? 5 answers

    Looking for ONLY BMW 3 or 5 series, automatic, year 2008 to 2012, 4-door sedan ONLY

    2012 BMW 3 Series 328i Sedan

    -

    Shopping & Pricing

3 Series

Looking for a Used 3 Series in your area?

CarGurus has 38,829 nationwide 3 Series listings starting at $1,498.

ZIP:

Search BMW 3 Series Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

BMW 3 Series Experts

#1 Tom Demyan
Tom Demyan
Reputation 4,160
#2 Robert Charlson
Robert Charlson
Reputation 1,420
#3 Matt Mankinen
Matt Mankinen
Reputation 1,130
View All

Related Models For Sale

Used BMW 5 Series
610 Great Deals out of 15,344 listings starting at $2,495
Used BMW M3
65 Great Deals out of 2,063 listings starting at $2,650
Used Mercedes-Benz C-Class
617 Great Deals out of 32,179 listings starting at $1,990
Used Audi A4
320 Great Deals out of 12,042 listings starting at $950
Used Ford Mustang
530 Great Deals out of 42,736 listings starting at $1,699
Used Mercedes-Benz E-Class
357 Great Deals out of 22,572 listings starting at $1,450
Used BMW X5
484 Great Deals out of 15,392 listings starting at $2,500
Used BMW 7 Series
174 Great Deals out of 5,685 listings starting at $3,299
Used Honda Accord
996 Great Deals out of 75,204 listings starting at $899
Used BMW 6 Series
112 Great Deals out of 3,271 listings starting at $7,995
Used BMW 1 Series
97 Great Deals out of 1,820 listings starting at $6,800
Used Dodge Charger
465 Great Deals out of 30,103 listings starting at $2,275
Used BMW X3
288 Great Deals out of 12,742 listings starting at $3,776

Used Cars For Sale

2017 BMW 3 Series For Sale
8 Great Deals out of 7,844 listings starting at $29,995
2016 BMW 3 Series For Sale
175 Great Deals out of 5,535 listings starting at $22,175
2015 BMW 3 Series For Sale
26 Great Deals out of 915 listings starting at $17,371
2014 BMW 3 Series For Sale
174 Great Deals out of 3,314 listings starting at $13,799
2013 BMW 3 Series For Sale
341 Great Deals out of 5,224 listings starting at $11,950