Best Method to Burp Cooling System - Chevelle Tech
Heating & Cooling Heating, cooling and air conditioning

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post #1 of 11 (permalink) Old Jul 4th, 20, 12:49 PM Thread Starter
 
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Best Method to Burp Cooling System

I'm firing up my new 454 motor for the first time and want to make sure ALL the air is out of the cooling system, especially the block. Any tried and true methods? The car is a '71 w/ AC.
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post #2 of 11 (permalink) Old Jul 4th, 20, 1:23 PM
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Re: Best Method to Burp Cooling System

1/8 inch hole or 2 drilled in thermostat.
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post #3 of 11 (permalink) Old Jul 4th, 20, 1:24 PM
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Re: Best Method to Burp Cooling System

Fill it with the heater hose removed from the intake or the thermostat housing and thermostat removed and you will have most if not all air out of the system.
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post #4 of 11 (permalink) Old Jul 4th, 20, 4:06 PM
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Re: Best Method to Burp Cooling System

I don't worry about it during breakin unless the temp gauge goes whacky with wild swings in temp. Once the breakin is done, I monitor the temp gauge, if its not going nuts all is good. If it is then I just stuff a water hose into the waterneck after the thermostat opens and force the air out. If the temp gauge is rock steady there is no air in the system.

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post #5 of 11 (permalink) Old Jul 4th, 20, 10:33 PM
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Re: Best Method to Burp Cooling System

I simply run the engine til it gets up to temp with the radiator cap off. Do you have a reservoir on the system and a proper recovery cap??
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post #6 of 11 (permalink) Old Jul 4th, 20, 10:48 PM
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Re: Best Method to Burp Cooling System

Quote:
Originally Posted by LeoP View Post
I simply run the engine til it gets up to temp with the radiator cap off. Do you have a reservoir on the system and a proper recovery cap??
You can't idle for a long period of time before breakin. The object is to get the rpms up right away.

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post #7 of 11 (permalink) Old Jul 4th, 20, 11:35 PM
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Re: Best Method to Burp Cooling System

This may sound a little crude, but what I've done in the past is to fill the system up to to the radiator cap opening and/or the thermostat opening like Marcus said, and then raise the front end of the car 18" to 2 feet up in the air with a floor jack, and then top it off again with more coolant. Then after bringing it to operating temperature and running it for awhile, I let it cool down for a good 4 hours, and then raise the front end up in the air and top off the radiator again, and it's good to go. This ensures that your radiator neck is the highest point of the system. Or if you happen to have a driveway that's on a hill, you can just do the same with it parked there.
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post #8 of 11 (permalink) Old Jul 5th, 20, 9:45 AM
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Re: Best Method to Burp Cooling System

I have a small Kioti tractor with a small 3cyl. deisel that I use for snow removal that I installed a block heater in for easier starts during the winter (Gets pretty cold in Upper Mi.) I knew it would be a long process to get the air out of the cooling system with the slow warm up of the deisel but the dealer that I got the unit from let me borrow a vacuum tool for refilling the system. I was not familiar with these but if I was still working at the Chevy store(retired) I'd definetely have one. I've always used the thermostat removal method in the past but this method works the fastest and easiest as far as I'm concerned,all you need is compressed air and your coolant mixture and when your done the only place you'll be adding coolant wil be topping off the recovery tank if you have one.
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post #9 of 11 (permalink) Old Jul 5th, 20, 1:04 PM
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Re: Best Method to Burp Cooling System

Quote:
Originally Posted by Don B View Post
I have a small Kioti tractor with a small 3cyl. deisel that I use for snow removal that I installed a block heater in for easier starts during the winter (Gets pretty cold in Upper Mi.) I knew it would be a long process to get the air out of the cooling system with the slow warm up of the deisel but the dealer that I got the unit from let me borrow a vacuum tool for refilling the system. I was not familiar with these but if I was still working at the Chevy store(retired) I'd definetely have one. I've always used the thermostat removal method in the past but this method works the fastest and easiest as far as I'm concerned,all you need is compressed air and your coolant mixture and when your done the only place you'll be adding coolant wil be topping off the recovery tank if you have one.
If your not familiar with this tool use the Google machine and check it out.
Good tip!

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post #10 of 11 (permalink) Old Jul 5th, 20, 10:00 PM
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Re: Best Method to Burp Cooling System

Quote:
Originally Posted by oldcutlass View Post
You can't idle for a long period of time before breakin. The object is to get the rpms up right away.



My system still works even during initial break-in!!

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post #11 of 11 (permalink) Old Jul 5th, 20, 10:03 PM
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Re: Best Method to Burp Cooling System

I drill a 1/8” hole in the T-stat

Tighten it till it strips and back it off a quarter turn.
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