Easiest way to drain coolant from block/heads?
Thread Starter
Senior Member
Joined: Jul 1999
Posts: 784
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From: Sacramento, CA
Car: 89 Iroc
Engine: 383
Transmission: 700R4
Axle/Gears: 3.45
Easiest way to drain coolant from block/heads?
I'm fixing an intake leak and did not drain the coolant ahead of time.
Everything is off except for the manifold but it's full of coolant. I'm afraid it will spill into the motor once I remove the manifold, is that true? (sorry dumb question)
If so how can I get around this? Thanks.
Danny T
Everything is off except for the manifold but it's full of coolant. I'm afraid it will spill into the motor once I remove the manifold, is that true? (sorry dumb question)
If so how can I get around this? Thanks.
Danny T
Supreme Member
Joined: Sep 1999
Posts: 3,197
Likes: 10
From: Manassas VA
Car: 04 GTO
Engine: LS1
Transmission: M12 T56
The block does have drain plugs. About halfway between the front and back, just above the pan rail you'll see some bolts sticking out. Actually, the knock sensor will be in one of them.
Thread Starter
Senior Member
Joined: Jul 1999
Posts: 784
Likes: 0
From: Sacramento, CA
Car: 89 Iroc
Engine: 383
Transmission: 700R4
Axle/Gears: 3.45
Thanks Ed. I didn't jack the car up though so I don't think I can get to them. I forgot about the fan switch in the block on the passenger side since it's accessible from above.
Danny T
Danny T
Member
Joined: Aug 2002
Posts: 162
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From: Blaine WA
Car: 84 Z28
Engine: 355/460hp
Transmission: glide\ford 9"
If you pulled the lower rad hose it is just a good thermo holding you up. Just loosen the heater hose fitting that is on the engine side of the thermo and your water should nicely dump out. That is unless I am reading another page from what you are saying.
Bob
Bob
Joined: Aug 1999
Posts: 858
Likes: 6
From: Elkton MD, USA
Car: 1985 Camaro Z28, VIN F
Engine: 427 sbc, HSR
Transmission: T-56, self rebuilt 700+ hp
Axle/Gears: Moser 12bolt, 3.42 trutrac
Re: Easiest way to drain coolant from block/heads?
Originally posted by DannyT
I'm fixing an intake leak and did not drain the coolant ahead of time.
Everything is off except for the manifold but it's full of coolant. I'm afraid it will spill into the motor once I remove the manifold, is that true? (sorry dumb question)
If so how can I get around this? Thanks.
Danny T
I'm fixing an intake leak and did not drain the coolant ahead of time.
Everything is off except for the manifold but it's full of coolant. I'm afraid it will spill into the motor once I remove the manifold, is that true? (sorry dumb question)
If so how can I get around this? Thanks.
Danny T
method I've found (4th-gen crowd figured it out) is to:
1) carefully remove top rad hose from rad and catch
small amount of dribble
2) wet-vac down the rad hose and you can get a pint thru the stat
3) remove the rad hose & stat and continue the wet-vac'ing until you have 1 gallon.
(takes about 30 seconds.. 8-)
It's amazing how well it works after dumping coolant
down into my motor so many times..
mike
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