what could be causing the back of the engine to smoke after a flush.

Asked by Dec 18, 2015 at 09:38 AM about the 2007 Pontiac Grand Prix Base

Question type: Maintenance & Repair

I flush my  system because my heat stop working every since i flush my
heatcore system my engine had been burning at the back of it everytime i
crank it The back of my engine is running hot now so i was trynna see if its
my oil bowls or another repair

2 Answers


What is burning? Oil or coolant? If it's coolant, check the heater core hoses near the back of the engine/firewall, the clamps might be loose or the hoses need replacing.


The plastic elbows that go to the heater are prone to leaking. It's possible that the flushing process has caused them to fail. They are cheap to fix and will leave you stranded if they fail.

Your Answer

Pontiac Grand Prix Experts

  • #1
  • #2
    Tom Demyan
  • #3
View All

Related Models For Sale

Used Chevrolet Impala
397 Great Deals out of 25,595 listings starting at $799
Used Dodge Charger
242 Great Deals out of 32,689 listings starting at $1,800
Used Pontiac G8
4 Great Deals out of 317 listings starting at $4,688
Used Chevrolet Monte Carlo
3 Great Deals out of 937 listings starting at $3,900
Used Pontiac GTO
358 listings starting at $2,950
Used Pontiac G6
27 Great Deals out of 2,876 listings starting at $699
Used Ford Mustang
270 Great Deals out of 37,081 listings starting at $2,150
Used Pontiac Grand Am
723 listings starting at $1,700
Used Chevrolet Malibu
480 Great Deals out of 49,315 listings starting at $2,000
Used Chrysler 300
313 Great Deals out of 19,328 listings starting at $1,899
Used Dodge Challenger
111 Great Deals out of 25,139 listings starting at $7,995
Used Nissan Maxima
200 Great Deals out of 17,499 listings starting at $1,900

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.