How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Joel Your Own Question

Joel
Joel, Auto technician
Category: Chevy
Satisfied Customers: 1599
Experience:  GM, ASE Certified Technician. Chevy, Buick, Pontiac, Olds. Over 18 Years experience and growing.
Type Your Chevy Question Here...
Joel is online now
A new question is answered every 9 seconds

venture: van cooling system it has very little heat

Resolved Question:

who do you get the air bubbles out of 3.4 venture van cooling system it has very little heat
Submitted: 4 years ago.
Category: Chevy
Expert:  Joel replied 4 years ago.

Hello and welcome.

Are the bubbles and no heat the reason you replaced t-stat, or is this just happening afterwards?

 

Customer: replied 4 years ago.
there was no heat before i started with the thermostat,we had this problem last year also
Expert:  Joel replied 4 years ago.

OK.

The reason i asked is that this engine is common for headgasket problems causing air pockets in the cooling system- so no heat. The rear headgasket is most prone to this. You should not have to replace a t-stat every year. I would suggest pressure testing system, or looking at passenger side of rear head for signs of leaking. Inspecting spark plug would also show a problem with a headgasket.

 

Other than that, best way to get air out after a cooling system repair is to have engine off, loosen the bleeder and let air purge until only coolant coming out. The bleeder is on top of a pipe, above the water pump area at passeenger side of front valve cover.

Then close bleeder. Let run until hot, shut it off, lossen bleader again to let out any remaining air. May take a few times.

If it persists, i would definately look into a headgasket problem. Especially if it is boiling over.

 

 

 

 

Customer: replied 4 years ago.
the engine never gets all the way up to temp and does not stay at temp keeps going up and down ,it also has rear heat and it is nice and warm
Expert:  Joel replied 4 years ago.

Yes, sounds like air in the system.

Would look into headgasket problem.

Air pockets in the system around the temp sensor will not show proper coolant temp. Sensor cant read air, only fluid.

 

Customer: replied 4 years ago.
there is no drivability problems and no sigh of head gasket failure just an air pocket in heater core hoses is there anyway to burp the air out of heater core
Expert:  Joel replied 4 years ago.

As described above, use that bleeder screw.

Then cap it off and take it on a short drive. Do a few hard accelerations, and the this will usually get it out. You will notice all of a sudden blows nice and hot.

 

Joel, Auto technician
Category: Chevy
Satisfied Customers: 1599
Experience: GM, ASE Certified Technician. Chevy, Buick, Pontiac, Olds. Over 18 Years experience and growing.
Joel and 6 other Chevy Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
< Last | Next >
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
< Last | Next >
  • http://ww2.justanswer.com/uploads/TI/tim37857/2011-10-28_23053_S6301814.64x64.JPG Tim's Auto Repair's Avatar

    Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
  • http://ww2.justanswer.com/uploads/DT/dt69nova/2012-6-15_234154_pic1.64x64.jpg Dave Nova's Avatar

    Dave Nova

    Chevrolet Technician

    Satisfied Customers:

    6870
    ASE Master Certification. GM World Class Certification
  • http://ww2.justanswer.com/uploads/ggrote1/2009-06-27_031011_me.jpg Gary's Avatar

    Gary

    Chevy Technician

    Satisfied Customers:

    5404
    15 years GM master tech
  • http://ww2.justanswer.com/uploads/testedtuff/2009-09-26_170108_pictures.jpg John's Avatar

    John

    Master A.S.E Automotive technician

    Satisfied Customers:

    4071
    A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
  • http://ww2.justanswer.com/uploads/RO/rodcuda/2011-7-25_224114_Donhoff1.64x64.JPG Neal's Avatar

    Neal

    Chevy Mechanic

    Satisfied Customers:

    2306
    Shop Owner and Mechanic on multiple makes.
  • http://ww2.justanswer.com/uploads/goodwrench9124/2008-11-09_220838_dscf0007.jpg goodwrench9124's Avatar

    goodwrench9124

    ASE Certified Technician

    Satisfied Customers:

    2041
    Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer, Hybrid certified
  • http://ww2.justanswer.com/uploads/DR/drivefast1971/2012-1-12_172422_0009051tQKh.64x64.jpg Ron Z.'s Avatar

    Ron Z.

    - Chevy Tech -

    Satisfied Customers:

    1912
    18+yrs experience. State Inspector and Chevy Diagnostics