Bleeding coolant system.
23 July 2007, 11:23 PM
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Bleeding coolant system.
What's the correct way to bleed the coolant system? The radiator side tank on my MY99 has a nice crack in it and I've taken it off to get it replaced/fixed..
Is there a way to bleed them correctly?
Also what coolant or antifreeze is reccommended.
I know the procedure for bleeding cars in general but this is the first turbo car I've owned and as cooling plays a big part on turbo/engine life I don't want to **** i up stupidly.
Damien
Is there a way to bleed them correctly?
Also what coolant or antifreeze is reccommended.
I know the procedure for bleeding cars in general but this is the first turbo car I've owned and as cooling plays a big part on turbo/engine life I don't want to **** i up stupidly.
Damien
23 July 2007, 11:35 PM
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aren't they self bleeding?
Do you have the hand book. Might say in that. I'll wake the wife up if i start rummaging about the bedroom for mine.! NOT GOOD IDEA
Do you have the hand book. Might say in that. I'll wake the wife up if i start rummaging about the bedroom for mine.! NOT GOOD IDEA
23 July 2007, 11:42 PM
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i'm getting worried... You keep the manual for your Impreza in your bedroom??
Under the matress or what, for when she's got the painters round and has fallen asleep!
LOL. Will have a hoak through it tomorrow. Can't be arsed going outside now.
Damien
Under the matress or what, for when she's got the painters round and has fallen asleep!
LOL. Will have a hoak through it tomorrow. Can't be arsed going outside now.
Damien
24 July 2007, 01:07 AM
#4
Just replaced my coolant this afternoon...
Fill the system until the coolant level, in the header tank, no longer goes down.
Take the pipe, that goes from header tank to the radiator, off at the header tank end [not the expansion pipe].
Squeeze and hold top hose.
put finger over the pipe from rad. to header tank that you've removed.
Release hold on top hose.
Repeat the three steps above until coolant level in the header tank stops dropping and/or coolant flows from rad to header tank pipe, when the top hose is squeezed.
re-connect header tank to rad. pipe.
Check/top up coolant level.
start the engine.
switch interior heater on hot.
Allow engine to get up to temp. making sure the heater gets hot and rad. fans operate.
Jobs a good un, Bob's your aunty
Fill the system until the coolant level, in the header tank, no longer goes down.
Take the pipe, that goes from header tank to the radiator, off at the header tank end [not the expansion pipe].
Squeeze and hold top hose.
put finger over the pipe from rad. to header tank that you've removed.
Release hold on top hose.
Repeat the three steps above until coolant level in the header tank stops dropping and/or coolant flows from rad to header tank pipe, when the top hose is squeezed.
re-connect header tank to rad. pipe.
Check/top up coolant level.
start the engine.
switch interior heater on hot.
Allow engine to get up to temp. making sure the heater gets hot and rad. fans operate.
Jobs a good un, Bob's your aunty
24 July 2007, 11:31 PM
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Personally, I do the squeeze pipe method as above, but only half/three quarter fill the header tank (tank on top of engine) and run the engine up without the cap fitted, heater on full heat, fan on 1 and a/c off. Holding 2000rpm for a few seconds every now and again. Any air in the system then finds its way out though the open filler. If the level drops below half, top back up.
When it starts to overflow switch off and replace cap, don't worry, bit of spilt coolant never did any harm...better that than trapped air. If it doesn't overflow (unlikely) and the fans kick in, just top it up to the brim and put the cap back on.
After that your good to go.
Make sure expansion tank is topped up (the little tank by the battery), so when the engine cools, it "should" syphon coolant back into the header tank. Doesn't always work so you'll need to recheck coolant levels in the header tank again (one on the engine) when the engine is stone cold.
When it starts to overflow switch off and replace cap, don't worry, bit of spilt coolant never did any harm...better that than trapped air. If it doesn't overflow (unlikely) and the fans kick in, just top it up to the brim and put the cap back on.
After that your good to go.Make sure expansion tank is topped up (the little tank by the battery), so when the engine cools, it "should" syphon coolant back into the header tank. Doesn't always work so you'll need to recheck coolant levels in the header tank again (one on the engine) when the engine is stone cold.
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