Over Heating and Radiator questions

20

Asked by Jan 31, 2014 at 02:16 PM about the 2003 Chevrolet Blazer 4 Door LS

Question type: Maintenance & Repair

My car is overheating really quickly, I've seen no signs of a leak but I do have no heat for my air conditioning. Can these two things be related? the radiator fluid is just dumping into the overfill and looks boiled off inside the radiator. Do I need to flush it now too?

6 Answers

42,435

Have you changed out your thermostat yet? Do that first. Probably your problem and the cheapest part to start with.......

1 of 1 people found this helpful.
20

I replaced the thermostat 2 weeks ago, I also flushed the radiator out at that time too

2 of 2 people found this helpful.
42,435

The only other component that will usually cause a vehicle to overheat is the water pump. If your air conditioner is not putting out cool air, your compressor is probably bad. In your description you said, "no heat for my air conditioning". Did you mean to say that when you turn on your blower fan for heat you have no heat? If so, that would mean that your heater core is plugged. Have you dumped a ton of stop leak into your radiator before? I did that once, and it all settled in my heater core and plugged it solid.......

1 of 1 people found this helpful.
20

The blower fan, however I've never put any stop leak in it

20,685

You have air in the system or blown head gasket. Go to advance or autozone and buy a air bleed kit for the cooling system. This will get all the air out with no mess. If it still overheats you probably have a blown head gasket.

1 of 1 people found this helpful.
10

or he might have a plugged radiator or heater core, how many miles are on it? last time the water pump was replaced? could have no fins left on it. how did you flush the cooling system? how is the fans working? are they electric? do they have two speeds if they're electric or if its mechanical, turn the car off and gently shake the fan, if it moves around easily the clutch went bad, also a good time to replace the water pump. usually on those cars the blend door gets stuck on the cool position and won't go down for the heat does your ac work well and the heat suck? hhmmm theres so much to know when your working on cars.

1 of 1 people found this helpful.

Your Answer

Blazer

Looking for a Used Blazer in your area?

CarGurus has 923 nationwide Blazer listings starting at $950.

ZIP:

Chevrolet Blazer Experts

  • #1
    Andrew Olsen
    Reputation
    2,090
  • #2
    yetilikesbeer
    Reputation
    1,400
  • #3
    Rowefast
    Reputation
    1,070
View All

Related Models For Sale

Used Chevrolet Tahoe
852 Great Deals out of 44,859 listings starting at $1,980
Used Chevrolet TrailBlazer
66 Great Deals out of 4,372 listings starting at $1,400
Used Chevrolet S-10
16 Great Deals out of 1,209 listings starting at $1,550
Used Chevrolet Silverado 1500
2,715 Great Deals out of 196,363 listings starting at $699
Used GMC Jimmy
198 listings starting at $1,994
Used Chevrolet Camaro
503 Great Deals out of 33,525 listings starting at $1,450
Used Chevrolet Colorado
347 Great Deals out of 41,211 listings starting at $1,995
Used Ford F-150
3,205 Great Deals out of 239,355 listings starting at $1,300
Used Ford Explorer
1,184 Great Deals out of 77,013 listings starting at $2,100
Used GMC Yukon
624 Great Deals out of 23,445 listings starting at $1,200
Used Jeep Grand Cherokee
1,048 Great Deals out of 84,369 listings starting at $1,200
Used Chevrolet Impala
563 Great Deals out of 36,779 listings starting at $990

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.