2001 Chevrolet Malibu back flowing through resevoir tank

2001 CHEVROLET MALIBU
250,000 MILES
Avatar
TYLERSDAD1026
  • MEMBER
  • 3 POSTS
i have recently in the last week the thermostat water pump and bled the system and when im driving the car it does good when i stop the car back-flows through the overflow there is no water mixing with the oil and no smoke coming from exhaust
Aug 30, 2013 at 8:06 AM
Avatar
SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
Does the gauge say its over heating when the coolant boils over? If not you might just have a bad radiator cap.
Aug 30, 2013 at 11:53 AM
Avatar
TYLERSDAD1026
  • MEMBER
  • 3 POSTS
it doesnt have radiator cap it just has the expansion tank the only time that it shows its overheating is when water has gotten to low do to backflow
Aug 30, 2013 at 10:06 PM
Avatar
SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
The cap on your expansion tank is your radiator cap sounds like most likely you have a bad cap not holding pressure will do that.There inexpensive I try a new cap.
Aug 31, 2013 at 2:46 AM
Avatar
TYLERSDAD1026
  • MEMBER
  • 3 POSTS
When it boils over it sounds like it has alot of pressure so the cap would do this also
Aug 31, 2013 at 10:52 AM
Avatar
SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
Ether the gauge is wrong you have engine compression going into the cooling system or you have a bad cap. A cap is a cheap easy thing to try before trying other things and testing other things.
Aug 31, 2013 at 11:59 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
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 new question

Frequently Asked Problems for This Vehicle