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Old 12-21-2004, 05:13 PM   #1
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Bleeding Lt1 cooling system
do i bleed the system with the car running or do i bleed the system with the car off
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92 firebird 305 lo3 16.00 1/4 mile 2.5 60 foot before any mods mods.
Mods so far:10" by 3" open flat base air cleaner hooker 3in cat back catco highflo cat adjustible fuel pressure regulator ultimate TBI mods edelbrock TES headers and y pipe 2 inch eibach drop kit richmond 3.73 gears slp 4th gen take off posi spohn adjustable panhard bar CGS Subframe connectors, home made wonder bar. currently gaining parts for LT1 intake swap

95'trans am LT1 Blue just got as a trade for my old 85'. looking for interior door panels and center console and radio bezel for anyone who can help.
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Old 12-21-2004, 05:17 PM   #2
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Put coolant in. Start car. Unscrew the bleeder screw near the thermostat housing. Wait ti'll fluid shoots out, close bleeder screw. Done.
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Best time (with stock cam on the old 350): 60' 2.396 - 13.733 @ 107.48 MPH
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Old 12-21-2004, 08:59 PM   #3
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one important thing, wait till the coolant is up to temperature so the thermostat is open
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Old 12-21-2004, 09:12 PM   #4
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Don't you have to bleed both screws? Or is one acceptable?
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Old 12-21-2004, 09:14 PM   #5
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Should be only one screw...... Never heard of a second bleeder screw.
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91 RS Camaro | 383 LT1/T-56
Stage III ported heads | CC306 Cam | Electric Waterpump
1.6:1 Rocker Arms | SLP headers | 3" Exhaust
Forged Rotating assembly | Whole lot of *** woopin!
Best time (with stock cam on the old 350): 60' 2.396 - 13.733 @ 107.48 MPH
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Old 12-22-2004, 10:06 AM   #6
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Quote:
Originally posted by pasky
Should be only one screw...... Never heard of a second bleeder screw.
My '95 has two bleeder screws and have read some posts about bleeding both screws on CZ28.
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Old 12-22-2004, 10:52 AM   #7
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It is best to get one of these: http://www.geocities.com/cplca/FreaseBleeder.html

For that low of a price it does an excellent job of of not getting any coolant on the opti.
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Old 12-22-2004, 04:03 PM   #8
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Quote:
Originally posted by ShiftyCapone
My '95 has two bleeder screws and have read some posts about bleeding both screws on CZ28.
Weird! Where is the second screw? I only have one near my thermostat housing. I have a 95.
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91 RS Camaro | 383 LT1/T-56
Stage III ported heads | CC306 Cam | Electric Waterpump
1.6:1 Rocker Arms | SLP headers | 3" Exhaust
Forged Rotating assembly | Whole lot of *** woopin!
Best time (with stock cam on the old 350): 60' 2.396 - 13.733 @ 107.48 MPH
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Old 12-22-2004, 05:12 PM   #9
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Quote:
Originally posted by pasky
Weird! Where is the second screw? I only have one near my thermostat housing. I have a 95.
I will have to dig up a pic. The car is in storage so I can't get to it easily. I only noticed that there were two screws when I bled the system a summer ago. There were two bleeder valves around the thermostat (been while and can't even remember where they are) that are about a few inches apart from each other. Apparently you can bleed one effectivly or tyou can do a two step process. I didn't really look into it much past that but I can see I need to now
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Old 12-22-2004, 05:25 PM   #10
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Here is a pic. You can see the one bleeder screw in the line there. I am not sure if people include this in their swaps. If they do then they have 2 bleeders.
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File Type: jpg p1010043a.jpg (92.6 KB, 111 views)
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Old 12-22-2004, 05:40 PM   #11
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Ahhhhhhhhhhhhhhhhhhhh, yea, that crap ain't on my car. The waterpump itself has a bleeder, only one I use.
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91 RS Camaro | 383 LT1/T-56
Stage III ported heads | CC306 Cam | Electric Waterpump
1.6:1 Rocker Arms | SLP headers | 3" Exhaust
Forged Rotating assembly | Whole lot of *** woopin!
Best time (with stock cam on the old 350): 60' 2.396 - 13.733 @ 107.48 MPH
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Old 10-14-2011, 09:54 PM   #12
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Re: Bleeding Lt1 cooling system
I only found one bleeder by thermostat( is there One are Two bleeders ?) Help
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Old 10-14-2011, 09:54 PM
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