2003 Chevy Trailblazer water pump

2003 CHEVROLET TRAILBLAZER
92,000 MILES • V8 • 4WD • AUTOMATIC
Avatar
MATTNAVLET
  • MEMBER
  • 4 POSTS
The car was running fine, but the water pump just started to leak. So I replaced the water pump, belts, hoses and the T-stat.
Fired it up and it over heats. So I got a different t-stat. Still over heats.----Put the old t-stat back in (I know, that was reaching) still over heats.

One symptom...it overheats, but no heat from the vents.

I want to try back flushing the cooling system, but I don't know how.
May 2, 2009 at 10:19 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Back flushing the system is just reversing the normal flow of the coolant. Rather than flushing from the upper hose into the engine, do it from the lower. Also, you mentioned you are getting no heat. Did you bleed the system of air?
May 8, 2009 at 1:40 PM
Avatar
MATTNAVLET
  • MEMBER
  • 4 POSTS
I did not bleed the system. How do I go about doing that?
May 8, 2009 at 10:31 PM
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
There should be a bleeder on or near the t-stat housing. You may have an air block.
May 8, 2009 at 10:34 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.