Replaced stat is there a bleeder valve or hose for air bleed. - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 5.3L V8 Engine and Drivetrain > OEM Issues

OEM Issues Original Equipment Repairs and/or Problems

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  #1  
Old 03-13-2012, 10:19 AM
chasmanz28's Avatar
chasmanz28 chasmanz28 is offline
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2008 SAAB 9-7x
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Replaced stat is there a bleeder valve or hose for air bleed.

Is there a certain way to get the air out of the system on the 5.3, from what im reading on alldata it doesnt mention anything about bleeder valves or hoses? i dont want to overheat the engine thanks.
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  #2  
Old 03-13-2012, 11:03 AM
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shorty shorty is offline
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2005 Chevy TrailBlazer LS
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put your heater and fan on high, stick a funnel in radiator opening to keep coolant from spilling out, and the air will bubble out,as coolant goes down keep filling till full
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Old 03-13-2012, 06:53 PM
Wyle Wyle is offline
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Don't know about the 5.3 V8, but the service manual says there is a coolant bleeder hose on the 4.2 I6.
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Old 03-15-2012, 11:18 PM
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Meltdown211 Meltdown211 is offline
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2008 Chevy TrailBlazer SS (3SS)
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Just did mine yesterday...

Shorty is right, take the radiator cap off, start the truck and let it heat up. Watch the coolant rise and fall AND burp bubbles. It took mine about 30 minutes to get all the air out. When its "done" the fluid inside the radiator will typically swirl. if it continues to rise and fall, there's more air inside. No need for any bleeder valve, just some patience will fix it.

Rev it a few times to jostle the air out too.
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Old 03-16-2012, 12:00 AM
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chasmanz28 chasmanz28 is offline
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2008 SAAB 9-7x
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Quote:
Originally Posted by Meltdown211 View Post
Shorty is right, take the radiator cap off, start the truck and let it heat up. Watch the coolant rise and fall AND burp bubbles. It took mine about 30 minutes to get all the air out. When its "done" the fluid inside the radiator will typically swirl. if it continues to rise and fall, there's more air inside. No need for any bleeder valve, just some patience will fix it.

Rev it a few times to jostle the air out too.
I figured it out, that along with taking off the small hose on top of the engine worked thanks.
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Old 08-05-2013, 06:43 PM
Sportjunkee Sportjunkee is offline
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2005 Envoy bleeder

Quote:
Originally Posted by Wyle View Post
Don't know about the 5.3 V8, but the service manual says there is a coolant bleeder hose on the 4.2 I6.
Does the service manual state where the bleeder valve is located?
I just replaced the upper & lower hoses, thermostat & ECT sensor and now truck has idle going low and high and not constant.

thanks
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