Best way to primarily fill and bleed air out of coolant on new engine?
Disconnect the upper throttle body coolant line at the throttle body, that's the highest point in the system. Fill slowly until coolant comes out the pulled line, then reattach the line and warm up the motor. This works for me everytime and I never have to add more than a few cups afterwards.
Originally posted by DamonB
Disconnect the upper throttle body coolant line at the throttle body, that's the highest point in the system. Fill slowly until coolant comes out the pulled line, then reattach the line and warm up the motor. This works for me everytime and I never have to add more than a few cups afterwards.
Disconnect the upper throttle body coolant line at the throttle body, that's the highest point in the system. Fill slowly until coolant comes out the pulled line, then reattach the line and warm up the motor. This works for me everytime and I never have to add more than a few cups afterwards.
Last edited by johnchabin; Jul 11, 2003 at 11:33 AM.
hmmm, ok, I have that one going directly to the rear of the engine as I have elimanted the coolant going through the throttle body... Should do the same thing though... Thanks I will try that.
Originally posted by DamonB
Disconnect the upper throttle body coolant line at the throttle body, that's the highest point in the system. Fill slowly until coolant comes out the pulled line, then reattach the line and warm up the motor. This works for me everytime and I never have to add more than a few cups afterwards.
Disconnect the upper throttle body coolant line at the throttle body, that's the highest point in the system. Fill slowly until coolant comes out the pulled line, then reattach the line and warm up the motor. This works for me everytime and I never have to add more than a few cups afterwards.
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Originally posted by ejmack1
wait... the picture shows the hose that should be pulled should be on the rear of the engine, does it really matter which side of it is pulled?
wait... the picture shows the hose that should be pulled should be on the rear of the engine, does it really matter which side of it is pulled?
If you have an AST it does a pretty good job of getting the air out. I just fill, put caps on, squeeze upper radiator line a few times, remove caps and top off. Do this 2 or 3 times then run the car until it warms up. Let it cool off and top it off again. After that you probably shouldnt have to add anything.
Originally posted by ejmack1
wait... the picture shows the hose that should be pulled should be on the rear of the engine, does it really matter which side of it is pulled?
wait... the picture shows the hose that should be pulled should be on the rear of the engine, does it really matter which side of it is pulled?
Ok seeing that is not the highest point in my system, seeing i dont have a throttle body coolant line or an AST should i just pull the line off the back of the water pump, or the back of the engine?
Yeah, the arrow is right. Disconnect it at the tb itself for the reason adam c explained.
Tom93R1, the ast does it's job but when the coolant is completely drained the system tends to trap air. For me even squeezing the rad lines doesn't get as much as opening the tb line. If I had my tb bypassed, I would imagine squeezing the rad lines is the best thing you could do. By doing it as described here you can get the far majority of air out before you even start the car though.
Tom93R1, the ast does it's job but when the coolant is completely drained the system tends to trap air. For me even squeezing the rad lines doesn't get as much as opening the tb line. If I had my tb bypassed, I would imagine squeezing the rad lines is the best thing you could do. By doing it as described here you can get the far majority of air out before you even start the car though.
Originally posted by ejmack1
Ok seeing that is not the highest point in my system, seeing i dont have a throttle body coolant line or an AST should i just pull the line off the back of the water pump, or the back of the engine?
Ok seeing that is not the highest point in my system, seeing i dont have a throttle body coolant line or an AST should i just pull the line off the back of the water pump, or the back of the engine?
That's the correct hose. Just be careful to put it back on when you start burping the system. I made that mistake .... whoops ... there's goes a couple quarts of coolant all over the engine bay and onto the ground.
And I still burp the system about 3-4 times whenever I flush the coolant.
And I still burp the system about 3-4 times whenever I flush the coolant.
Originally posted by DamonB
Disconnect the upper throttle body coolant line at the throttle body, that's the highest point in the system. Fill slowly until coolant comes out the pulled line, then reattach the line and warm up the motor. This works for me everytime and I never have to add more than a few cups afterwards.
Disconnect the upper throttle body coolant line at the throttle body, that's the highest point in the system. Fill slowly until coolant comes out the pulled line, then reattach the line and warm up the motor. This works for me everytime and I never have to add more than a few cups afterwards.
To burp my car after using the disconnected TB coolant line technique, I parked my car and ran it on an incline (about 15-20 degrees) with the nose up and my coolant buzzer went off immediately. I shut the car off and refilled and the coolant buzzer didn't come on again. Also, be sure your overflow tank and AST are filled as well before burping.
Full Member
Joined: Sep 2002
Posts: 190
Likes: 0
From: Edwards AFB, CA
Here's the way the tech's do it. Go buy a coolant system funnel. It is a funnel with a speacial adapter to attach right on to your filler neck. It also comes with a long handled stopper (plug).
Take of your filler cap attach the funnel and then fill it half full of coolant mixture. Start your car and watch the funnel. Your t-stat will open as your car warms and you will see frothing bubble come up in the funnel and the half full funnel will empty some. This is how it removes the air without making a mess. Don't let your car warm up to much or the coolant will boil since the system can not pressurize. Shut off the engine let the car cool for a minute or two and then put the stopper in the funnel. and disconnect it from the car. Put the filler cap back on and you are good to go. FYI no matter what method you choose you will have to check your coolant by removing the filler cap the next morning for a few days and topping it of. (only a few table spoons worth for a few days) good luck any questions just ask.
I will try to find a link to that coolant funnel so you can see it.
Take of your filler cap attach the funnel and then fill it half full of coolant mixture. Start your car and watch the funnel. Your t-stat will open as your car warms and you will see frothing bubble come up in the funnel and the half full funnel will empty some. This is how it removes the air without making a mess. Don't let your car warm up to much or the coolant will boil since the system can not pressurize. Shut off the engine let the car cool for a minute or two and then put the stopper in the funnel. and disconnect it from the car. Put the filler cap back on and you are good to go. FYI no matter what method you choose you will have to check your coolant by removing the filler cap the next morning for a few days and topping it of. (only a few table spoons worth for a few days) good luck any questions just ask.
I will try to find a link to that coolant funnel so you can see it.
Full Member
Joined: Sep 2002
Posts: 190
Likes: 0
From: Edwards AFB, CA
http://www.matcotools.com/ProductImages/SFF2.jpg
here is a matco version. Mine is snap-on but it is the same.
here is a matco version. Mine is snap-on but it is the same.
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yes it is the highest point but there might still be some air traped in the radiator line so a win win situation...

