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Cooling system help. #1238548
05/23/12 11:36 PM 05/23/12 11:36 PM
Joined: Mar 2010
Posts: 213
Canada
C
Cape Offline OP
enthusiast
Cape  Offline OP
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Canada
Hey this might sound like a stupid question but what's the easiest way to bleed a cooling system. I just got my Hemi back from the dyno and put in my car and was wondering about that. The only way I thought to do it was to run the car with the cap off. Thanks
Re: Cooling system help. [Re: Cape] #1238549
05/23/12 11:44 PM 05/23/12 11:44 PM
Joined: Oct 2003
Posts: 7,506
Az
Crizila Offline
master
Crizila  Offline
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Az
Quote:

Hey this might sound like a stupid question but what's the easiest way to bleed a cooling system. I just got my Hemi back from the dyno and put in my car and was wondering about that. The only way I thought to do it was to run the car with the cap off. Thanks

That usually is enough. You can also jack the car up from both ends to try and get trapped air out. Drilling a couple of 1/8" holes in the stat shell will help - along with "burping" ( squeezing ) the upper hose. Once the coolant gets up to temp and the stat opens, the air should bleed out without any help.

Fastest 300
Re: Cooling system help. [Re: Crizila] #1238550
05/24/12 02:13 AM 05/24/12 02:13 AM
Joined: Mar 2010
Posts: 213
Canada
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Cape Offline OP
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Cape  Offline OP
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Canada
Thanks for the info. Much appreciated. Do you use a thermostat if your just racing?
Re: Cooling system help. [Re: Cape] #1238551
05/24/12 08:31 AM 05/24/12 08:31 AM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
master
Dodgem  Offline
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Ontario, Canada
Yes get a high flow!
Re: Cooling system help. [Re: Cape] #1238552
05/24/12 08:35 AM 05/24/12 08:35 AM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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MR_P_BODY  Offline
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Romeo MI
Quote:

Thanks for the info. Much appreciated. Do you use a thermostat if your just racing?



I dont use a stat... I like to go into the burnout
at 160 so if I leave the burnout and it opens while
sitting on the starting line... I dont want that with
E-85... I like the whole system to be one temp
Re: Cooling system help. [Re: MR_P_BODY] #1238553
05/24/12 09:53 AM 05/24/12 09:53 AM
Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
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MRMOPAR622 Offline
top fuel
MRMOPAR622  Offline
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Posts: 2,008
Sweet Home Alabama
Get a radiator pressure tester(you can borrow one from Autozone)put it on and pump it up to around 25 lbs and let it set over night,I like to let mine set 24 hours it will push all the air out of your system.After I found out how good it worked I went back and brought me a radiator pressure tester to keep in the shop.

"To Be The Man'You Have Got To Beat The Man" "T/D and Pro-Bracket Racer"
Re: Cooling system help. [Re: Cape] #1238554
05/24/12 10:01 AM 05/24/12 10:01 AM
Joined: Jan 2003
Posts: 13,387
Marion, South Carolina [><]
an8sec70cuda Offline
I Live Here
an8sec70cuda  Offline
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Marion, South Carolina [><]
Does your water pump/housing have a temp sending unit on top? If so, just crack it loose and listen for the air coming out. When you see water coming out, tighten it back up and you're done.

You can always drill a few holes in the thermostat if you do run one...that will bleed it out as you fill it up.
If you're not running a thermostat, it won't need to be bled out.

CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Cooling system help. [Re: MRMOPAR622] #1238555
05/24/12 10:01 AM 05/24/12 10:01 AM
Joined: Nov 2004
Posts: 7,274
s.w.fl
B
bonefish Offline
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bonefish  Offline
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s.w.fl
out of the HUNDREDS of cars ive owned and built throughout my life ,never once did i have a prob. with air in the cooling system.just fillem and runem.so i guess its true,"somtimes even a blind dog gets a bone"
Re: Cooling system help. [Re: Cape] #1238556
05/24/12 11:16 AM 05/24/12 11:16 AM
Joined: Oct 2003
Posts: 7,506
Az
Crizila Offline
master
Crizila  Offline
master

Joined: Oct 2003
Posts: 7,506
Az
Quote:

Thanks for the info. Much appreciated. Do you use a thermostat if your just racing?

No. I'm not concerned about a fast warm-up and I want as much flow through the rad as possible ( reads least restriction ).

Fastest 300

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