Coolant bleeder pipe
TECH Apprentice
Joined: Feb 2011
Posts: 316
Likes: 0
From: Central Florida
How about this:
"GM's pink colored Dex Cool coolant has been used since the late 90s. It is sensitive to air pockets and has been known to congeal or turn gelatinous if the cooling system runs low on antifreeze/coolant. The LS1 designers knew these engines would be sensitive to air in the coolant system, so they devised a way to evacuate air from the block with the 1/4 inch steam ports or vents. There are four, two at the back of the block and two at the front. Because these engines are almost always installed at an angle, the rear two are often sealed or blocked, but the front two go to a high point in the cooling system, NOT to an unpressurized reservoir."
How 'bout dem apples!
"GM's pink colored Dex Cool coolant has been used since the late 90s. It is sensitive to air pockets and has been known to congeal or turn gelatinous if the cooling system runs low on antifreeze/coolant. The LS1 designers knew these engines would be sensitive to air in the coolant system, so they devised a way to evacuate air from the block with the 1/4 inch steam ports or vents. There are four, two at the back of the block and two at the front. Because these engines are almost always installed at an angle, the rear two are often sealed or blocked, but the front two go to a high point in the cooling system, NOT to an unpressurized reservoir."
How 'bout dem apples!
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
I don't have a pic of mine right now, but the Champion aluminum radiator I installed in my 73 Camaro had two additional threaded bungs in the passenger side tank (no, not the trans cooler ports). Anyway, one was near the top very close to where the steam port line would attach to the radiator on an LS1 F-body set up. So I replaced the plug with a barbed hose fitting and routed the steam vent line to it. Looks like it was purpose built for this swap.
TECH Apprentice
Joined: Feb 2011
Posts: 316
Likes: 0
From: Central Florida
Same here - the new radiator I got had an extra hole near the upper hose - looks like it is purposely made for steam ports. I hammererd a short little piece of brake line into some plastic and then epoxyed the piece into the hole.
My concern with the water pump fix is that the steam doesn't rise "down".
My concern with the water pump fix is that the steam doesn't rise "down".
I don't have a pic of mine right now, but the Champion aluminum radiator I installed in my 73 Camaro had two additional threaded bungs in the passenger side tank (no, not the trans cooler ports). Anyway, one was near the top very close to where the steam port line would attach to the radiator on an LS1 F-body set up. So I replaced the plug with a barbed hose fitting and routed the steam vent line to it. Looks like it was purpose built for this swap.
Here was my solution.
And a very detailed post about it. Part came from Jags that Run.
https://ls1tech.com/forums/14148663-post97.html
And a very detailed post about it. Part came from Jags that Run.
https://ls1tech.com/forums/14148663-post97.html
TECH Regular
iTrader: (5)
Joined: Jan 2008
Posts: 452
Likes: 2
From: Sparta, Mo. in southwest Missouri
*1970camaroRS* has a good solution. I think both Jegs and Summit also sell a similar piece with different size NPT bungs. These also work well for an after market temp gauge sender. If you're handy ,you can easily make one yourself, as in "free" LOL.
TECH Resident
Joined: Sep 2009
Posts: 859
Likes: 2
From: Frozen Tundra, WI
How about this:
"GM's pink colored Dex Cool coolant has been used since the late 90s. It is sensitive to air pockets and has been known to congeal or turn gelatinous if the cooling system runs low on antifreeze/coolant. The LS1 designers knew these engines would be sensitive to air in the coolant system, so they devised a way to evacuate air from the block with the 1/4 inch steam ports or vents. There are four, two at the back of the block and two at the front. Because these engines are almost always installed at an angle, the rear two are often sealed or blocked, but the front two go to a high point in the cooling system, NOT to an unpressurized reservoir."
How 'bout dem apples!
"GM's pink colored Dex Cool coolant has been used since the late 90s. It is sensitive to air pockets and has been known to congeal or turn gelatinous if the cooling system runs low on antifreeze/coolant. The LS1 designers knew these engines would be sensitive to air in the coolant system, so they devised a way to evacuate air from the block with the 1/4 inch steam ports or vents. There are four, two at the back of the block and two at the front. Because these engines are almost always installed at an angle, the rear two are often sealed or blocked, but the front two go to a high point in the cooling system, NOT to an unpressurized reservoir."
How 'bout dem apples!
They never had problems at this level in a traditional SBC.