cooling problem

[microgalant]

problem again with my 7g, all the coolant in the radiator goes in the reservoir tank, the one by the radiator. what would be the problem?

[frag_daddy_2007]

it could be a lot of things.
run the car until it gets hot and then touch the lower radiator hose, if it is cold, you need a new t-stat
if it is still hot, it could be a faulty water pump, or a bubble in the pump.

[DOHCstunr]

ever replaced the radiator cap?
they wear out over time.

one thing that you shoudl check...
take off the radiator cap, examine the ridge where the radiator cap seats.
shoudl be one nice smooth lip all the way around.
if its brittle or damaged anywhere on that seat then your radiator cap will not seal the radiator.

this happened to my radiator. on my old 94 es, and my current raditor from my GS.
don't know why, just fatigue i suppose. my coolant has never been anything other than perfect in both cars. i change it once a year.

[RedGalant2k1]

Well, when your car gets hot more coolant will be pushed into the resevoir. Is there any other issues you've noticed? Does your temp gauge run hot or cold? Is the coolant excessively dirty?

There really isn't enough information to tell you anything useful.

[DOHCstunr]

when your vehicle is to temp(like after a hard run)
caustiously squeeze the upper radiator hose.

if its firm then yoru coolant pushing is most likely normal. if your hose is soft, and you can compress it with yoru hand... most likely yoru radiator cap is shot.