bleeding air from cooling sysytem
Super Moderator
Joined: May 2006
Posts: 18,398
From: Wisconsin
Have you found the bleeder screw in the thermostat housing?
It can be done with engine on or off. I've had better luck with it off, but YMMV.
On the 98 4-cyl Accord I used to have, bubbles would hang out in the high spots of both radiator hoses.
Upper hose bubbles can be pushed into the radiator.
Lower hose bubbles can be pushed into the thermostat housing.
It can be done with engine on or off. I've had better luck with it off, but YMMV.
On the 98 4-cyl Accord I used to have, bubbles would hang out in the high spots of both radiator hoses.
Upper hose bubbles can be pushed into the radiator.
Lower hose bubbles can be pushed into the thermostat housing.
Thread Starter
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Junior Member
Joined: Jan 2009
Posts: 73
Have you found the bleeder screw in the thermostat housing?
It can be done with engine on or off. I've had better luck with it off, but YMMV.
On the 98 4-cyl Accord I used to have, bubbles would hang out in the high spots of both radiator hoses.
Upper hose bubbles can be pushed into the radiator.
Lower hose bubbles can be pushed into the thermostat housing.
It can be done with engine on or off. I've had better luck with it off, but YMMV.
On the 98 4-cyl Accord I used to have, bubbles would hang out in the high spots of both radiator hoses.
Upper hose bubbles can be pushed into the radiator.
Lower hose bubbles can be pushed into the thermostat housing.
Super Moderator
Joined: May 2006
Posts: 18,398
From: Wisconsin
Yeah, then after you drive the car for a day or 2, check it again. Couple random air bubbles usually make their way to either the thermostat or to the radiator cap.
I usually squeeze the radiator hoses when the engine is cold. You don't want to hear any sloshing, only the little pin rattling in the thermostat.
I usually squeeze the radiator hoses when the engine is cold. You don't want to hear any sloshing, only the little pin rattling in the thermostat.
Thread Starter
|
Junior Member
Joined: Jan 2009
Posts: 73
Yeah, then after you drive the car for a day or 2, check it again. Couple random air bubbles usually make their way to either the thermostat or to the radiator cap.
I usually squeeze the radiator hoses when the engine is cold. You don't want to hear any sloshing, only the little pin rattling in the thermostat.
I usually squeeze the radiator hoses when the engine is cold. You don't want to hear any sloshing, only the little pin rattling in the thermostat.
thank you!
something thats bothering me; everytime i check the radiator, i have to add fluid, though there are no visible leaks.
no water in the oil thankfully, but where is this fluid going?
Last edited by jackfast; Feb 5, 2009 at 05:37 PM.
Super Moderator
Joined: May 2006
Posts: 18,398
From: Wisconsin
A little bit going out the exhaust (bad headgasket) will not make much noticable steam.
Or...
Get/borrow/rent a cooling system tester. It's a funny little tire-pump thing that attaches where the radiator cap goes. Pressurize the system COLD to find leaks.
Normally, the system pressurizes itself by its temperature. When the fluid leaks out HOT, it can evaporate almost immediately & you have a difficult time finding it.
Or...
Get/borrow/rent a cooling system tester. It's a funny little tire-pump thing that attaches where the radiator cap goes. Pressurize the system COLD to find leaks.
Normally, the system pressurizes itself by its temperature. When the fluid leaks out HOT, it can evaporate almost immediately & you have a difficult time finding it.
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