Back again. Air in coolant systems persists. Advice needed
#12
![Default](https://www.s2ki.com/forums/images/icons/icon1.gif)
Mine doesn't do it immediately. Takes about a week. Went back to the shop and they say air may have been still in the lines even after they and I bled it... They flushed out everything, heater hose, rad and all hoses. Re bled and filled. No problems yet but like I said it always takes about a week. It very well could have still had air in the lines but I know when I bled it it didn't. Idk. We'll see what happens. Do you have any other symptoms of a bad hg? Did they test for exhaust in the coolant? Leak down?
#14
![Default](https://www.s2ki.com/forums/images/icons/icon1.gif)
For anyone who stumbles across this thread, my problem ended up being a bad water pump. It was failing under pressure/high load causing coolant to boil in the system which in turn cause air in the system. So, water pumps on our cars do go bad. Just not very often.
#17
Registered User
Join Date: Jan 2014
Location: Gloucester UK
Posts: 19
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.s2ki.com/forums/images/icons/icon1.gif)
Ok. This will be a rather lengthy post, but I need to give all the details so bare with me please. I've had over heating/air in coolant system plonked for like 2 months now. In the past 3 weeks I have replaced my thermostat (oem) intake manifold gasket and bottom radiator hose. After I installed these I bled the system following Billmans advice (always use his method). Maybe a week later the car over heats again and this time I break down and take the car to a reputable shop. The guy really knows what he's doing from all I know, and he's a good guy. Anyways, he discovers that my cap isn't holding pressure despite it having no visible signs of being faulty. So, replaced that, new coolant, bled the system, pressure tested the system and it didn't lose any pressure over something like a 5 hour period or so, he also tested for exhaust gases in the coolant as I was worried I may have a faulty head gasket. No exhaust gases in coolant. So, I'm happy, yay my car is fixed and it was all along a simple, inexpensive rad cap!.. Or so I believed. It's been a little over a week since I had this done and just a day or so ago, heat starts getting weak like it has before. It will only blow hot while I'm drive (60+) and blows cold as slow speeds or idle. I checked my bottom rad hose after letting the car warm up this morning and it was cold... Bingo! We have air in the lines I'm thinking. So the story now is. I'm not getting heat unless going fast, bottom hose is cold but my car is NOT over heating. Still should be air in the lines. My question is, how in the world am I getting air in my lines so slowly. It takes a week or more to accumulate these problems again. I'm so frustrated. There are no leaks or anything. Any advice is welcome since I'm at my ropes end with this problem. Sorry for the enormous post
#18
Moderator
![](https://www.s2ki.com/forums/images/s2ki/ranks/moderator.png)
![](https://staticssl.ibsrv.net/autocomm/Content/S2Ki/milestonestars-10yr.png)
#20
![Default](https://www.s2ki.com/forums/images/icons/icon1.gif)
https://www.s2ki.com/s2000/topic/719...ctures-inside/
i guess this guy was one of the few.