This thing has been bugging me for weeks. I've been burping my cooling system every few days (at first, I probably wasn't doing it right, but now I think I've got it), and it seems to take care of the problem. The next day, I see the bubble in the down-tube of my overflow bottle again! It's smaller now than it was, but it's still there. I'm about to pull my hair out!
The only leak I can find is a few drops of coolant on the underside of the overflow tube where it is attached to the radiator cap neck. Could this leak be letting air into the down-tube? Should I add some hose clamps? Anyone know of anything else that could be keeping me from getting rid of the bubble? Should I keep doing what I'm doing until it finally goes away?
Joined: Aug 2003
Reputation: 0 Garage: 1
The leak could allow air in.
Do you hear the air bubble go through the system when you first turn the truck on? 3 times a year I hear that, I fix it by cracking the radiator cap then adding fluid. It goes away for a while. I also have a leak in the same spot. Ive just been to lazy to fix it
rent or take it to a shop who has a pressure tester and use it. it's a radiator cap with a hose connected to a pump, you put the cap on, pump the thing up then release the air somewhere else high on the motor, like heater bypass (water pump bypass) usually this helps fix the problem
I would clamp the overflow line. When i belled the air out of my system. I start the truck up with the heater wide open and have the radiator cap off. Let it runb for a few minutes and the air bubbles should stop in the radiator. Put the cap on and your done
Well, I clamped my overflow line this evening. I ran it for 10-15 miles to and from the local shopping mall, and when I got home, I checked it, and no bubbles or leaks. I'm going to keep an eye on it for the next few days, and make sure I don't get any more bubbles.
Plus, after days of trying to get rid of the bubble, I'll kick the shshit out of the first guy who opens my radiator cap!!!