Over heating

Asked by Lirpa17 Sep 22, 2018 at 04:07 PM about the 2002 Chevrolet Blazer LS 4-Door 4WD

Question type: Maintenance & Repair

My 2002 Chevy Blazer is over
heating when going up mountain.
New water pump and new intake
gasket,flushed system. ???

2 Answers

Did you purge air out of the system? If all else fails you may be due for a new radiator.

300

Drain the engine block at the bottom to fully get rid of all the crap. Also need to put in a new radiator with peacock plug so you can flush and drain easier in the future. The radiators are terribly and clog easily. That will fix our heating issues. Also their heater core if neglected are notorious for clogging as well. That is a lot of work though so you probably want to avoid that altogether. Just flush the hell out of the system and drain and reverse flush the heater core to unclog the heater core. You can pour coolant flush into the heater core and let it sit inside the heater core with the heater core hoses plug up so the chemical stays only inside the heater core to work it's magic and unclog all the gunk inside. Then after a few days or at least 24-48 hrs flush the heater core by itself and let it drain into a catch container. That should bust lose all the gunk in there. Then put in new radiator. Also should check that your clutch fan is operating good. If it is failing it could cause your car to overheat. You can google online how to test. It's cheap I would just go ahead and replace it if it is original even if it passes the test. Since you already have everything out and easy to get to why not.

Your Answer:

CarGurus Experts

  • #1
    Andrew Olsen
    Reputation
    4,240
  • #2
    Rowefast
    Reputation
    3,540
  • #3
    yetilikesbeer
    Reputation
    2,410
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Trailblazer
17 Great Deals out of 1,350 listings starting at $21,800
Used Jeep Grand Cherokee
121 Great Deals out of 3,487 listings starting at $4,950
Used Chevrolet Tahoe
18 Great Deals out of 859 listings starting at $9,980
Used Chevrolet Silverado 1500
222 Great Deals out of 9,112 listings starting at $2,900
Used Ford Explorer
53 Great Deals out of 2,231 listings starting at $7,990
Used Toyota RAV4
111 Great Deals out of 2,857 listings starting at $2,949
Used Chevrolet Camaro
25 Great Deals out of 511 listings starting at $11,500
Used Dodge Durango
65 Great Deals out of 1,994 listings starting at $7,999
Used Honda CR-V
157 Great Deals out of 4,953 listings starting at $440

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. Content will be removed if CarGurus becomes aware that it violates our policies.