07 cobalt LS 2.2 overheating problems

20

Asked by K9tool Feb 13, 2018 at 11:03 PM about the 2007 Chevrolet Cobalt LS Coupe FWD

Question type: Maintenance & Repair

07 cobalt LS 2.2 overheats, replaced thermostat ,
radiator ( twice) drilled 2 holes in thermostat,
replaced head gasket ( coolant in oil , which is when
all this started ) I had a 50/50 ( yea right !! Because
it froze right after I did head gasket) from there on
out it gets 230 at 55 mph and anything above that
will send it over 250 .. please anyone that can help
???

2 Answers

20

Problem found .. after removing the water pump I was amazed that at first appearance nothing was wrong .. wasn’t leaking , making noise , no rattiling , no broken or missing impeller.. I spun the sprocket side and impeller spun .. my heart sank .. then ( for reasons unknown to me still) I stuck my thumb in the impeller and held impeller while I spun the sprocket side.. it held and the shaft was able to spin without the impeller moving .. quite freely.. I put new water pump in and got on 75 nb today for bout 45 miles it never got over 160* .. problem solved !! Something I should’ve mentioned in original post is when I said it froze it got slushy so it wasn’t froze completely solid and that was -5* f out without windchill in northern Michigan.. thanks for the responses and the help !!!

2 people found this helpful.
10

K9tool I think I have the same problem with the 06 colbolt 22 I just bought it starts and I hear like a tapping on the back of the motor all most likely its coming from the headers but all most to the side now the guy I got it off of said that it's running hot and It needs a waterpump I just hope that is all it needs cuz I wasn't sure if it would need a new exhaust system to get it to Quite it up and I was just hoping any one would help me out with what they think

1 people found this helpful.

Your Answer:

Cobalt

Looking for a Used Cobalt in your area?

CarGurus has 22 nationwide Cobalt listings starting at $3,500.

Postal Code:

CarGurus Experts

  • #1
    munron
    Reputation
    8,130
  • #2
    John Carson
    Reputation
    2,270
  • #3
    MoGo
    Reputation
    1,980
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Malibu
48 Great Deals out of 1,130 listings starting at $2,995
Used Chevrolet Corvette
21 Great Deals out of 605 listings starting at $10,989
Used Chevrolet Impala
9 Great Deals out of 138 listings starting at $3,990
Used Ford Mustang
54 Great Deals out of 1,606 listings starting at $6,200
Used Ford Focus
19 Great Deals out of 547 listings starting at $2,499
Used Honda Civic
186 Great Deals out of 4,226 listings starting at $2,499
Used Toyota Camry
45 Great Deals out of 1,150 listings starting at $3,900
Used Chevrolet Colorado
29 Great Deals out of 1,136 listings starting at $9,950
Used Lexus IS
29 Great Deals out of 400 listings starting at $5,400
Used Pontiac G6
15 listings starting at $7,999
Used Nissan Sentra
56 Great Deals out of 1,895 listings starting at $2,288
Used Chevrolet Equinox
93 Great Deals out of 3,623 listings starting at $1,995
Used Chevrolet Silverado 1500
213 Great Deals out of 9,034 listings starting at $2,900

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.