Bleeding Coolant System
Thread Starter
Team Owner
Joined: Dec 2000
Posts: 27,897
Likes: 9
From: I have no tolerence for liberals and fools, but sometimes i repeat myself
CI 3-5-7-8-9 Veteran
St. Jude Donor '08
Bleeding Coolant System
Does the Coolant system have to be burped on an LS1 the same as a C4 with an LT-1?
Is there a procedure for it?
Is there a procedure for it?
Racer
Joined: Jan 2005
Posts: 375
Likes: 0
From: Montreal Drive it like you test it !
Sorry for the late reply, I just scanned the thread with no reply. Here is the proceedure.
Drain and Fill procedure
1. Park the vehicle on a level surface.
2. Follow the steps below to remove the radiator sure tank fill cap :
a. Slowly rotate the cap counterclockwise.
b. Stop and allow the hissing to stop.
c. After all hissing stop, continue turning counterclockwise to remove the cap.
3. Opens the radiator drain ****. (It looks like a white plastic plug below the lower radiator hose. You can see it if your car is jack and you are under it). note. There are two types of drain plugs. On my 97 I can turn it with pliers. But on most recent vettes, there is a square hole in the middle. You need a ¼ ratchet extension to turn it. I found it out on changing the dexcool on my friend 2004 Z06. If this is the case, do not turn more than ¼ of a turn or you will break the plug. When I changed his, I turned for ¼ and the dexcool did not leak. I used a flat bled screw driver to gently pull the plug.
4. Allow the system to drain completely.
5. Inspect the engine coolant:
-Discolored – Follow the flush procedure below
-Normal in appearance –continue the next step
6. Close the radiator drain ****.
7. Fill the system through the radiator surge tank opening up to the base of the neck.
8. Start the engine.
9. Idle engine for 1 minute.
10. Install radiator surge tank cap.
11. Cycle the RPM, idle to 3000 for 30 seconds intervals until engine coolant reaches 210 F.
12. Shut off the engine.
13. Refer to step 3 above to remove the radiator surge tank cap.
14. Start the engine.
15. Idle engine for 1 minute and fill surge tank to ½ above COLD Full mark on the radiator surge tank.
16. Install the radiator surge tank cap.
17. Cycle the RMP, idle to 3000 in 30 seconds intervals until engine coolant reaches 210 F.
18. Shut off the engine.
19. Top off coolant as necessary, to ½ above COLD Full mark on the radiator surge tank.
20. Rinse away any excess coolant from the engine and the compartment.
21. Inspect the concentration of the coolant.
Drain and Fill procedure
1. Park the vehicle on a level surface.
2. Follow the steps below to remove the radiator sure tank fill cap :
a. Slowly rotate the cap counterclockwise.
b. Stop and allow the hissing to stop.
c. After all hissing stop, continue turning counterclockwise to remove the cap.
3. Opens the radiator drain ****. (It looks like a white plastic plug below the lower radiator hose. You can see it if your car is jack and you are under it). note. There are two types of drain plugs. On my 97 I can turn it with pliers. But on most recent vettes, there is a square hole in the middle. You need a ¼ ratchet extension to turn it. I found it out on changing the dexcool on my friend 2004 Z06. If this is the case, do not turn more than ¼ of a turn or you will break the plug. When I changed his, I turned for ¼ and the dexcool did not leak. I used a flat bled screw driver to gently pull the plug.
4. Allow the system to drain completely.
5. Inspect the engine coolant:
-Discolored – Follow the flush procedure below
-Normal in appearance –continue the next step
6. Close the radiator drain ****.
7. Fill the system through the radiator surge tank opening up to the base of the neck.
8. Start the engine.
9. Idle engine for 1 minute.
10. Install radiator surge tank cap.
11. Cycle the RPM, idle to 3000 for 30 seconds intervals until engine coolant reaches 210 F.
12. Shut off the engine.
13. Refer to step 3 above to remove the radiator surge tank cap.
14. Start the engine.
15. Idle engine for 1 minute and fill surge tank to ½ above COLD Full mark on the radiator surge tank.
16. Install the radiator surge tank cap.
17. Cycle the RMP, idle to 3000 in 30 seconds intervals until engine coolant reaches 210 F.
18. Shut off the engine.
19. Top off coolant as necessary, to ½ above COLD Full mark on the radiator surge tank.
20. Rinse away any excess coolant from the engine and the compartment.
21. Inspect the concentration of the coolant.
1st Gear
Joined: Jun 2021
Posts: 1
Likes: 3
This is what I did - see video link - I read about this technique somewhere on the Corvette forums -
Someone else deserves the credit for the idea.
Easy and worked great.
Only a few dozen very tiny bubbles after 15 minutes.
(Necessary after I replaced the original water pump at 150K miles - not for weeping but the bearing was shot and rattling a bit)
2001 C5 LT2 150K miles
C5 Cooling Sys air purge
Someone else deserves the credit for the idea.
Easy and worked great.
Only a few dozen very tiny bubbles after 15 minutes.
(Necessary after I replaced the original water pump at 150K miles - not for weeping but the bearing was shot and rattling a bit)
2001 C5 LT2 150K miles
C5 Cooling Sys air purge
Last edited by markyparky; Apr 24, 2022 at 08:01 PM.
Race Director
Joined: Oct 2004
Posts: 12,738
Likes: 4,587
This is what I did - I read about this technique somewhere on the Corvette forums -
Someone else deserves the credit for the idea.
Easy and worked great.
Only a few dozen very tiny bubbles after 15 minutes.
C5 Corvette Liquid Cooling System Air Purge (Burp)
(Necessary after I replaced the original water pump at 150K miles - not for weeping but the bearing was shot and rattling a bit)
2001 C5 LT2 150K miles
Someone else deserves the credit for the idea.
Easy and worked great.
Only a few dozen very tiny bubbles after 15 minutes.
C5 Corvette Liquid Cooling System Air Purge (Burp)
(Necessary after I replaced the original water pump at 150K miles - not for weeping but the bearing was shot and rattling a bit)
2001 C5 LT2 150K miles
