Post Reply 
 
Thread Rating:
  • 1 Votes - 5 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Question about car reservoir
12-22-2012, 06:30 PM
Post: #1
Question about car reservoir
Hi I own a 2000 Chevy Cavalier 4 cyl 2.2 liter, and a couple of months ago I noticed it trying to overheat. So I checked for any leaks and found none, had a pressure test done on it also no problems, So I flushed the system and changed the thermostat, and noticed it ran much cooler. Well today I noticed the water level was lower than usual so I looked found that one of the clamps was loose on the reservoir, and seen a where the water was leaking a little bit. So I fixed it. My question is when it was trying to overheat I would loosen the reservoir cap and their was a lot of pressure when the car would run for awhile even when it was in no danger of overheating, and I would noticed the water would steady stream into the reservoir from the overflow hose. Now that I have changed the thermostat I have noticed their is no steady stream from the hose and even after the car has been running for a hour straight I can take the cap off and hear no pressure. Also after the thermostat was changed the upper and lower radiator hose were under extreme pressure, now their is pressure in the hoses but no where near as much as before. The car is running nice and cool. Is their supposed to be water streaming into the reservoir all the time. Sorry for the long question I just have no idea how the reservoir system works. Thanks in advance
Find all posts by this user
Quote this message in a reply
12-22-2012, 10:00 PM
Post: #2
RE: Question about car reservoir
I can't remember all of the details from all cars but if that reservoir has a pressure cap and no cap on the radiator then any time you get a pressure change (like removing the cap) you will get some flow one way or the other. Obviously more pressure will make from more flow / exchange between the radiator and the reservoir. The fact that the temp is not running to the max will make a big difference.

As for how the system is supposed to work, the basic idea is to have no air in the radiator itself so no air bubbles get circulated within the system. (read: within the engine) The reservoir holds enough for the expansion / contraction of the coolant plus a little extra for reserve. No air in the system makes for better heat exchanging and less rust within the system. If you remember the old days of rusty coolant every few years, that's why. Back in those days we always left an inch of space in the top of the radiator when we filled it up.
Find all posts by this user
Quote this message in a reply
Post Reply 


Forum Jump:


User(s) browsing this thread: 1 Guest(s)