Do I need to replace my thermostat in the car?

Asked by Apr 19, 2014 at 09:36 AM about the 2003 Audi A4 1.8T Quattro

Question type: Maintenance & Repair

I have a 2003 Audi A4 Quattro 1.8L turbo.  Recently I had the water pump replaced due to
coolant leaking out.  Now while driving, the temperature gauge shows normal but after 15
to 20 minutes the temperature rises then returns to normal.  This happens continuously
while the car is running.  It shows no sign of overheating.  I don't see coolant leaking out
and when I turn on the heater it blows cold air.

4 Answers

2,505

I would suspect a Thermostat. It either stays open or shut. It is keeps open it never gets that warm and cold air is always blowing. Although, if it is stuck close it will overheat. I would replace it.

7 of 7 people found this helpful.
9,345

this would probably be due to the coolant has not been bled probley which is a comman occurrence when you get some one who does not know what there doing when refilling the antifreeze. There should be a bleed valve on the cooling lines under the hood in some cases 2 here is a link that should help you out. http://www.ehow.com/how_7675042_bleed-cooling-system-audi-18t.html . Alot of people don't realize the anti freeze cooling system in an audi is a closed pressurized cooling system and the reason you get the thermostat going up and down is the air pockets going threw your system are stuck in certain places and randomly the coolant gets threw those locations to spike your sensors. As for the heating system it will only work when your foot is pretty much half way to the floor due to the air bubbles in it as well. If you had AUDI do this work take it back and ask them to bleed your system properly and complain about them not bleeding the system properly which caused you more issues. you can do the same at where ever else you had it done but it would be best to take it to a vw or audi dealership to get it done, since they can do it properly

5 of 5 people found this helpful.
20

I have a 2005 a4 Audi Quattto that was given to me it over heat when trying to put coola t in the reserve tank had a crack in it now thats replaced its another spot where the coolant seems to be clogged or a house something is missing

2 of 2 people found this helpful.
9,345

is there any coolant flow? if there is zero heat coming out of the heater then you likely have a blocked or broken water pump. your going to need a flush to find out exactly whats going on here.

Your Answer

Add photo

Related Questions

A4

Looking for a Used A4 in your area?

CarGurus has 10,877 nationwide A4 listings starting at $1,899.

ZIP:

Search Audi A4 Questions

Audi A4 Experts

#1 Deathjam4
Deathjam4
Reputation 3,220
#2 lukeyramone
lukeyramone
Reputation 520
#3 Tom Demyan
Tom Demyan
Reputation 390
View All

Related Models For Sale

Used BMW 3 Series
971 Great Deals out of 31,729 listings starting at $1,000
Used Audi A6
159 Great Deals out of 6,470 listings starting at $2,495
Used Mercedes-Benz C-Class
443 Great Deals out of 26,582 listings starting at $2,000
Used Audi S4
43 Great Deals out of 1,604 listings starting at $4,500
Used Audi A3
69 Great Deals out of 6,351 listings starting at $3,700
Used BMW 5 Series
460 Great Deals out of 15,987 listings starting at $1,700
Used Honda Accord
812 Great Deals out of 84,287 listings starting at $1,050
Used Ford Mustang
474 Great Deals out of 45,735 listings starting at $1,999
Used Audi A8
38 Great Deals out of 2,024 listings starting at $3,490
Used Chevrolet Camaro
226 Great Deals out of 30,943 listings starting at $1,217
Used Mercedes-Benz E-Class
417 Great Deals out of 19,905 listings starting at $699
Used Honda Civic
654 Great Deals out of 88,603 listings starting at $995

Used Cars For Sale

2017 Audi A4 For Sale
33 Great Deals out of 4,837 listings starting at $27,999
2016 Audi A4 For Sale
9 Great Deals out of 210 listings starting at $23,577
2015 Audi A4 For Sale
10 Great Deals out of 332 listings starting at $18,800
2014 Audi A4 For Sale
44 Great Deals out of 1,273 listings starting at $14,996
2013 Audi A4 For Sale
17 Great Deals out of 467 listings starting at $11,250

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.