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Old 08-15-2011, 03:55 PM   #1
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Coolant air bleed valve question

There is a coolant air bleed valve on the neck of the radiator hose inlet on the intake and another in what appears to be a 5/8 inch heater hose. Is this second one absolutely necessary or can you successfully bleed the system using only the one on the large radiator hose inlet? I ask because I am having to replace the 5/8 inch hose.
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Old 08-15-2011, 04:17 PM   #2
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Re: Coolant air bleed valve question

There is one on the thermostat housing,and one on a coolant hose that goes to the w/p..Having both bleeders makes it easier to get the air out faster.
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Old 08-15-2011, 05:52 PM   #3
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Re: Coolant air bleed valve question

So you're saying you just don't want to hassle with it by fitting the section with the bleed screw back on? My opinion would be to go ahead and keep it, wouldn't take much more time fitting then what it would be to take it off...
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Old 08-15-2011, 07:34 PM   #4
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Re: Coolant air bleed valve question

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So you're saying you just don't want to hassle with it by fitting the section with the bleed screw back on? My opinion would be to go ahead and keep it, wouldn't take much more time fitting then what it would be to take it off...
No, that is not what I am saying! The hose in question has a leak right at the junction of the rubber hose and the metal fitting containing the bleed valve. I have already checked on getting a new replacement and the local GM dealer said that this hose is showing as being discontinued but that he could possiblity get it for around $200.00. Now as far as dealing with the "hassle", I can replace a section of the hose and fab up a bleed valve--my question was simply will the one bleed valve in the thermostat housing be sufficient or is this second one absolutely necessary. Any time I have bled the coolant system, I have always gotten a lot more air out of the thermostat housing bleed valve than the other one.
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Last edited by David94TA; 08-15-2011 at 07:40 PM.
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Old 08-15-2011, 08:50 PM   #5
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Re: Coolant air bleed valve question

Read this....
Coolant Fill and Bleeding Experts Needed
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Old 08-15-2011, 10:13 PM   #6
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Re: Coolant air bleed valve question

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No, that is not what I am saying! The hose in question has a leak right at the junction of the rubber hose and the metal fitting containing the bleed valve. I have already checked on getting a new replacement and the local GM dealer said that this hose is showing as being discontinued but that he could possiblity get it for around $200.00. Now as far as dealing with the "hassle", I can replace a section of the hose and fab up a bleed valve--my question was simply will the one bleed valve in the thermostat housing be sufficient or is this second one absolutely necessary. Any time I have bled the coolant system, I have always gotten a lot more air out of the thermostat housing bleed valve than the other one.
If the hose piece with the hole is #7 in this diagram (piece between bleeder and w/p), it is GM PART # 10215999 . You can carefully slit and peel off the swaged collar holding the hose to the bleeder assy and put the new little hose on with a normal hose clamp.

$200 would be for the complete heater hose assy, that is both hoses and metal pipe from w/p to heater core.
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Old 08-16-2011, 06:59 AM   #7
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Re: Coolant air bleed valve question

OK, thanks.
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Old 08-16-2011, 11:47 AM   #8
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Re: Coolant air bleed valve question

I have a heater hose complete for 50 shipped.
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Old 08-16-2011, 07:10 PM   #9
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Re: Coolant air bleed valve question

PM sent
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Old 08-16-2011, 11:21 PM   #10
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Re: Coolant air bleed valve question

In reference to post #6, here is how you can replace individual hoses.
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Old 11-17-2011, 07:24 PM   #11
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Re: Coolant air bleed valve question

There is an easier way to bleed the system and not run coolant down the front of the motor.

Click the image to open in full size.
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Old 11-18-2011, 05:24 PM   #12
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Re: Coolant air bleed valve question

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I have a heater hose complete for 50 shipped.
Please handle parts for sale with a "PM", not in the tech forums.
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Old 11-20-2011, 10:21 AM   #13
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Re: Coolant air bleed valve question

bigblackbeasst -- where did you get that bleed valve? That is always my least favorite part of the coolant process; messing up the newly cleaned engine. Much better than a rag which becomes one with the power steering pump pulley...not that that has happened to me twice.
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Old 11-20-2011, 08:39 PM   #14
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Re: Coolant air bleed valve question

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bigblackbeasst -- where did you get that bleed valve? That is always my least favorite part of the coolant process; messing up the newly cleaned engine. Much better than a rag which becomes one with the power steering pump pulley...not that that has happened to me twice.
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