Burping the LT-1?
Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
What year LT-1? 92-93 (have 2 bleed screws).....I think they went to only 1 in 94 .....Anyway, It helps to get it jacked up in the front so the radiator is a little higher than the engine. Fill with bleed screw(s) open and close (lower one first) each when a steady stream of coolant comes out. Be sure to put rags under the screws to protect the opti.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
The LT1 has a huge advantage - at least in the Vette - and that is the surge tank on the firewall.
Fill the tank, start the car and keep filling the tank until it stops sucking coolant.
As the t-stat opens, the engine will draw more coolant (this is assuming the system is nearly bone dry), and keep adding it.
Once the flow seems to be established, then burp it, but it should be ok.
On 1992/93 LT1s, there are burp screws on the throttle body and the top of the t-stat housing. I always used the t-stat housing burp only. This is especially true if the TB bypass has been performed.
Fill the tank, start the car and keep filling the tank until it stops sucking coolant.
As the t-stat opens, the engine will draw more coolant (this is assuming the system is nearly bone dry), and keep adding it.
Once the flow seems to be established, then burp it, but it should be ok.
On 1992/93 LT1s, there are burp screws on the throttle body and the top of the t-stat housing. I always used the t-stat housing burp only. This is especially true if the TB bypass has been performed.
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
Originally Posted by bogus
The LT1 has a huge advantage - at least in the Vette - and that is the surge tank on the firewall.
Fill the tank, start the car and keep filling the tank until it stops sucking coolant.
As the t-stat opens, the engine will draw more coolant (this is assuming the system is nearly bone dry), and keep adding it.
Once the flow seems to be established, then burp it, but it should be ok.
On 1992/93 LT1s, there are burp screws on the throttle body and the top of the t-stat housing. I always used the t-stat housing burp only. This is especially true if the TB bypass has been performed.
Fill the tank, start the car and keep filling the tank until it stops sucking coolant.
As the t-stat opens, the engine will draw more coolant (this is assuming the system is nearly bone dry), and keep adding it.
Once the flow seems to be established, then burp it, but it should be ok.
On 1992/93 LT1s, there are burp screws on the throttle body and the top of the t-stat housing. I always used the t-stat housing burp only. This is especially true if the TB bypass has been performed.
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
Originally Posted by bogus
The LT1 has a huge advantage - at least in the Vette - and that is the surge tank on the firewall.
Fill the tank, start the car and keep filling the tank until it stops sucking coolant.
As the t-stat opens, the engine will draw more coolant (this is assuming the system is nearly bone dry), and keep adding it.
Once the flow seems to be established, then burp it, but it should be ok.
On 1992/93 LT1s, there are burp screws on the throttle body and the top of the t-stat housing. I always used the t-stat housing burp only. This is especially true if the TB bypass has been performed.
Fill the tank, start the car and keep filling the tank until it stops sucking coolant.
As the t-stat opens, the engine will draw more coolant (this is assuming the system is nearly bone dry), and keep adding it.
Once the flow seems to be established, then burp it, but it should be ok.
On 1992/93 LT1s, there are burp screws on the throttle body and the top of the t-stat housing. I always used the t-stat housing burp only. This is especially true if the TB bypass has been performed.
With one difference I ensure the overflow is filled at least to the cold level and shut it down and let it cool. Then I check the expansion tank and overflow and fill if necessary.Mike
The flush is done and the car uphill a little. There are two bleeder screws. I will get to it! 
