Weird sound when I shut the car off...
Thread Starter
TECH Fanatic
Joined: Feb 2002
Posts: 1,640
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From: Austin, Tx.
Weird sound when I shut the car off... Ok, I changed my coolant 2 weeks ago. I ran it with the hose off of the throttle body untill all the air was out as I was filling it back up.
Now, when I shut the car off, you can hear what sounds like air gurgling near the radiator cap. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> So, it sounds like there is some air in it, but, I let it run for a good while with the hose off so that all the air would be able to escape. It does seem to run a tad warmer now, but with the idiot gauge on there, it could just be a perception. What gives?? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
Now, when I shut the car off, you can hear what sounds like air gurgling near the radiator cap. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> So, it sounds like there is some air in it, but, I let it run for a good while with the hose off so that all the air would be able to escape. It does seem to run a tad warmer now, but with the idiot gauge on there, it could just be a perception. What gives?? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
Re: Weird sound when I shut the car off... That sounds like air (less likely, steam)
being forced out the coolant recovery
(when the coolant stops circulating, the
hottest parts of the engine temporarily
make some steam and elevate coolant
pressure, blowing off some coolant and/or
trapped air into the recovery tank).
In a properly purged system you wouldn't
hear anything, because pure liquid flow
is quiet.
If the system is closed then eventually
all of the air will be purged. If you have
a leak in the water jacket anywhere, then
air will keep on being pulled in. Just have
to let this go on for a while and see if it
quits, or not.
being forced out the coolant recovery
(when the coolant stops circulating, the
hottest parts of the engine temporarily
make some steam and elevate coolant
pressure, blowing off some coolant and/or
trapped air into the recovery tank).
In a properly purged system you wouldn't
hear anything, because pure liquid flow
is quiet.
If the system is closed then eventually
all of the air will be purged. If you have
a leak in the water jacket anywhere, then
air will keep on being pulled in. Just have
to let this go on for a while and see if it
quits, or not.
Thread Starter
TECH Fanatic
Joined: Feb 2002
Posts: 1,640
Likes: 0
From: Austin, Tx.
Re: Weird sound when I shut the car off... that's kinda what I was thinking... that eventually it will purge itself. If it's not running hot, then it should be just a small amount of air. I'm keeping my eye on the fluid level for the time being. thanx for the info <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
