How to BURP an 87
12-04-2005, 07:40 PM
#1
Melting Slicks
Thread Starter
How to BURP an 87
Had to use the heater for the first time Saturday night. Worked great for a minute then went cold. Went to eat, came out after an hour and it was fine (plenty of heat all the way home). Asked around and was told I probably have an air bubble in the cooling system and to "burp" it. Did a search and only talk is about bleeding screw on the newer models. Any quick pointers to help get the air out? TIA
12-04-2005, 07:43 PM
#2
Team Owner
They call it "packing". With everything cold, open up the radiator cap and fill it to the top. Start the car, and bring the RPMs up to about 2000-2500. The level in the radiator will drop. Fill it up while holding the RPMs up, and replace the radiator cap before you let off the throttle.
12-04-2005, 08:50 PM
#3
Team Owner
Member Since: May 2002
Location: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Posts: 24,337
Likes: 0
Received 17 Likes
on
16 Posts
You need to let the car idle (with cap off) until it reaches tstat temperature.
Then do the procedure above. You can't fill the system fully unless the tstat is open.
I also run the heater during this. Not sure if that is necessary though.
Then do the procedure above. You can't fill the system fully unless the tstat is open.
I also run the heater during this. Not sure if that is necessary though.
12-05-2005, 04:31 PM
#6
Melting Slicks
Thread Starter
Just back to say thanks again. Burped my baby as per your instructions above. Waited till the thermostat opened, reved it till about 2K and the level sunk like a rock. Filled a 20oz Coke bottle full of new 50/50 mix beforehand to make it easy to top off the radiator and while keeping it reved up, poured about 18oz in to the top and put the cap on before letting off the revs. Hopefully got all the air out...will know the next time I take it out. 
CC: Ran the heater on full while doing the above...don't know if it helped but like Chicken Soup....it can't hurt.
CC: Ran the heater on full while doing the above...don't know if it helped but like Chicken Soup....it can't hurt.
12-05-2005, 04:41 PM
#7
Race Director
Member Since: Sep 2000
Location: The Top of Utah
Posts: 17,298
Likes: 0
Received 23 Likes
on
22 Posts
Originally Posted by CREWZIN
Hopefully got all the air out...will know the next time I take it out.
RACE ON!!!
It's cooling down now so will see if it will take any more when it's safe. Thanks. 
12-06-2005, 01:52 AM
#9
Le Mans Master
Member Since: Aug 2003
Location: Magnolia Mississippi
Posts: 9,884
Likes: 0
Received 3 Likes
on
3 Posts
St. Jude '03-'04-'05-'06-'07
I've had success with this also... Jack the front end up, then do the above procedure, with heater running, and you'll notice you again have more room. Take it for a spin, back home cool off, jack up and reburp... Took me 3 times to get air all out...
12-06-2005, 07:24 AM
#10
Team Owner
Originally Posted by vinnies87
I've had success with this also... Jack the front end up, then do the above procedure, with heater running, and you'll notice you again have more room. Take it for a spin, back home cool off, jack up and reburp... Took me 3 times to get air all out...
3
12-06-2005, 10:24 AM
#11
Team Owner
Member Since: May 2002
Location: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Posts: 24,337
Likes: 0
Received 17 Likes
on
16 Posts
I burp it one good time then overfill the overflow tank and let it do its thing. The car will remove air on its own at some point if you get enough out to allow it to build up to cap pressure.
Once its burped, you should only need to add coolant to the overflow tank, unless you let it run dry, then it'll pull air into the system. It's sort of like a brake hydraulic system in that regard, except it uses vacuum to lift coolant into it, instead of gravity from a reservoir.
Once its burped, you should only need to add coolant to the overflow tank, unless you let it run dry, then it'll pull air into the system. It's sort of like a brake hydraulic system in that regard, except it uses vacuum to lift coolant into it, instead of gravity from a reservoir.
12-06-2005, 11:38 AM
#12
Melting Slicks
Thread Starter
All right. Jacked the front end up and "Burped" it again. Didn't overfill the reserve tank but it's up to the "cold" line so there should be plenty enough in there for the radiator to pull anything it needs. Will wait till it cools down, take the cap off and top it up. That should do it. Thanks.
