Don't know why the car overheats, please help.


Asked by Jan 26, 2015 at 04:24 AM about the 2001 Volvo S40 Turbo

Question type: Maintenance & Repair

Hi. I have a Volvo S40 2.0T 2001 model. One day as I was driving the car lost power around the bend away from home and I was able to get it back there quickly. It had blown the radiator and the water pump was also worn out so I had them both replaced. the car was still overheating after that so I had the thermostat replaced but the car is still overheating. What could be the cause of that?

8 Answers


assuming that the coolant level is full, and the system has been bled properly, then it is possible that you have a bad head gasket. Have a combustion leak test done. or if you want to do it yourself, you can buy a test kit for about 40 bucks and there are lots of youtube vids on how to do it.

1 of 1 people found this helpful.

Be careful, overheating is serious trouble. First of all, check the fluid levels in the cooling system. Does the liquid disappear? if yes, then there is a leak in the system. It might be a simple hose leak or it can be other leaks in the system. If there is liquid in the system, then it does not circulate. Which is another problem. Can you verify the liquid levels.


Thanks for the response. The liquid levels are normal and I've checked all the hoses. I noticed it doesn't circulate and I can't figure out why.

1 of 1 people found this helpful.

It circulates when the Thermostat opens up. This happens if the engine temperature exceeds optimal operational levels. So if it is hot, and the liquid doesn't circulate then surely it is the thermostat. But you can't check that for yourself as the liquid temperature is fatal when the car is hot. Please don't try to check circulation at that level. The wise thing to do is to remove the thermostat. Get some water and boil it. Then throw the device in it. It should open up if it is work. If it doesn't, then its malfunctioning and you need to change it.

Just realized you already changed the thermostat. I do not know what else might be the problem. did you check the fan wiring?


Thanks for all your response, you've been very helpful. I am now convinced it is the head gasket. Anybody with tips on changing that would be very helpful right now. Could it be as simple as just replacing it or is there anything else I should look out for?

2 of 2 people found this helpful.

Not sure about all years, but a 2000 s40 / v40 has an air bleeder valve (red circle on hose from radiator on driver side).

4 of 4 people found this helpful.

Not sure about other years but a 2000 v40 / s40 has an air bleeder valve on the radiator hose on the driver side going into the engine. Looks like a small red plastic thumb screw.

4 of 4 people found this helpful.

Your Answer

Add photo

Related Questions


Looking for a Used S40 in your area?

CarGurus has 1,083 nationwide S40 listings starting at $750.


Search Volvo S40 Questions

Volvo S40 Experts

#1 venom5150
Reputation 720
#2 Tom Demyan
Tom Demyan
Reputation 390
#3 tenspeed
Reputation 350
View All

Related Models For Sale

Used Volvo S60
138 Great Deals out of 8,142 listings starting at $1,970
Used Volvo S80
36 Great Deals out of 984 listings starting at $995
Used BMW 3 Series
1,001 Great Deals out of 31,467 listings starting at $1,000
Used Honda Accord
1,054 Great Deals out of 66,814 listings starting at $1,000
Used Audi A4
300 Great Deals out of 10,524 listings starting at $1,000
Used Volkswagen Jetta
541 Great Deals out of 43,961 listings starting at $800
Used Volvo C70
24 Great Deals out of 488 listings starting at $2,300
Used Nissan Altima
1,300 Great Deals out of 74,568 listings starting at $1,000
Used Toyota Camry
1,204 Great Deals out of 82,539 listings starting at $750
Used Toyota Corolla
956 Great Deals out of 68,723 listings starting at $1,800
Used Honda Civic
844 Great Deals out of 83,686 listings starting at $1,200

Used Cars For Sale

2011 Volvo S40 For Sale
40 listings starting at $5,000
2010 Volvo S40 For Sale
6 Great Deals out of 70 listings starting at $4,500
2009 Volvo S40 For Sale
3 Great Deals out of 66 listings starting at $4,500
2008 Volvo S40 For Sale
4 Great Deals out of 148 listings starting at $1,800
2007 Volvo S40 For Sale
4 Great Deals out of 188 listings starting at $2,795

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.