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TCMdocs944's Avatar
 
Join Date: Dec 2002
Location: St. Petersburg, Florida
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Lightbulb Speed bleeder for Coolant?

Hey, anyone tried using a brake speedbleeding screw for the coolant bleed screw? Seems like it could save us all alot of trouble.

Anyone think it wouldn't work?

Which bleeder model to order?

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83 944 white w/Boxster wheels
Planned mods- custom leather interior, 968 antenna, soundsystem, 968 style rockers, clear sidemarkers
Old 12-01-2003, 09:53 AM
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83 944 white w/Boxster wheels
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Old 12-02-2003, 11:10 AM
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Ok, I think I will answer my own question....

Speed bleeder screw takes a significant amount of pressure to move the "check ball" and allow the fluid to bleed
...................Probably too much pressure for the cooling system

Regular bleed screw might do the trick. Insert where coolant bleed screw normally goes.

Get the system running.

Attach peice of hose to bleed screw for run-off.

Open screw until steam starts to escape.

Top off with coolant

Repeat until only coolant flows.

Close screw.


I for one think it will work. I am going to check tonight if my front caliper screw will work...I have them left over from the speed bleeder screw change.

Come on guys! Where's your sense of adventure....

I am sure many of you are tired of those pesky bubbles in your system after a coolant change, not to mention the mix coming out of the bleeder getting all into #1cylinder plug area..
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83 944 white w/Boxster wheels
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Old 12-05-2003, 01:55 PM
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Will not work. The brake bleeders seat on the bottom taper. The cooling bleeder seats on the gasket just under the head.
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Hugh - So Cal 83 944 Driver Person
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Old 12-05-2003, 02:21 PM
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Old 12-05-2003, 02:34 PM
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BUT!

You could find a small ball and seat fitting for high temp high pressure water/steam and use a coupling to fit it.

OR!

A barrel valve with a bit of copper tubing that will run down the side of the engine toward the ground.
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 12-05-2003, 02:48 PM
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I think reinventing this will be more problem than it's worth.

Buy a coolant system pressure tester. It is the most effective (and easiest) way to bleed the air out of the coolant.

Also, be careful with blowing coolant over a running engine. After all it is glycol (alcohol) and it could cause a nice fire.

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Old 12-06-2003, 08:14 AM
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