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 Steve Your Own Question
Steve
Steve, Auto Service Technician
Category: Car
Satisfied Customers: 5494
Experience:  25+ yrs experience as a professional working technician; ASE L1 master technician
157173
Type Your Car Question Here...
Steve is online now
A new question is answered every 9 seconds

1990 CHEVY CAMARO RS: OVERHEATING..HOSES, AND FLUSHED..OVERHEATS

Customer Question

I HAVE A 1990 CHEVY CAMARO RS, THAT KEEPS OVERHEATING, I ALREADY CHANGED THE RADIATOR, THERMOSTAT, RADIATOR CAP, HOSES, AND FLUSHED THE SYSTEM A COUPLE OF TIMES. I CONNECTED THE FAN DIRECT SO IT WILL STAY ON ALL THE TIME. EVERY TIME I TURN ON THE A/C IT OVERHEATS, WHAT ELSE COULD IT BE, OR WHAT DO YOU RECOMMEND?
Submitted: 11 years ago.
Category: Car
Expert:  Steve replied 11 years ago.

 there are several possibilities:


(1) There is a correct 50/50 mix of antifreeze in teh cooling system?   Water boils at 212 degrees, cooling fans when wirted normally come on around 220, and 50/50 mix boils around 270 so a normally functioning cooling system will boil over if it only has straight water in it.


(2) head gasket leeak allowing hot exhaust gas to enter a cooling jacket?   look for bubbles constantly appearing in the radiator while it is running.  There is also a quick easy chemical test most garages can do for this in about 2 minutes.


(3) failing water pump?  look for good flow in teh radiator when teh thermostat is open


(4) air trapped in the cooling system, preventing circulation?

Expert:  Steve replied 11 years ago.

 Another thought: make sure that any plastic air dam that came on teh car underneath teh front end is still there; these are critical on some body designs to direct airflow through (not around) the radiator to cool it.


   If you have A/C, make sure that the condenser fins are not blocked with dirt or debris blocking airflow.    Believe it or not, I have had some cars in our shop that I managed to lower the AC temepratures by 10 degrees just by using a pressure washer to wash bugs and dirt out of the core fins.    remember, all the air going through the radiator has to pass through the condenser first.


  Also, is it actually overheating?    If it is just the gauge reading indicating overheating, verify that you dont have a faulty gauge by measuring the engine temp directly.


If this vehicle has a serpentine belt, make sure it is routed correctly.   I have seen incorrrectly routed belts which were spinning a water pump backwards cause overheating problems.


   Does engine power seem normal?    A restricted exhaust, failed CAT, very late ignition timing, and other problems can cause an engine to produce way more waste heat than normal; usually there will be power loss or other symptoms as well.


   the fan isnt spinning backwards for some reason, is it?   It should blow air towards the engine when the vehicle is standing still.


 


 


 

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 would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
< Previous | Next >
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles Walnut Creek, CA
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue Charleston, WV
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim Castleberry, FL
  • Excellent reply, and also very quick. Really sounds like the Expert knows what he is talking about. I will be back to use your service when I need more help with my RV. Dutch USA
 
 
 

Meet The Experts:

 
 
 
  • Chris (aka-Moose)

    Chris (aka-Moose)

    Technician

    Satisfied Customers:

    1006
    16 years of experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)

    Technician

    Satisfied Customers:

    1006
    16 years of experience
  • http://ww2.justanswer.com/uploads/TE/TedG/2012-6-15_14759_avaLarge.64x64.jpg Ted G.'s Avatar

    Ted G.

    ASE Certified Technician

    Satisfied Customers:

    1694
    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    1447
    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • http://ww2.justanswer.com/uploads/BL/Bluegorilla/2012-6-21_16298_cam.64x64.JPG GM Tech (Cam)'s Avatar

    GM Tech (Cam)

    Auto Service Tech

    Satisfied Customers:

    669
    GM Grand Master Technician 2007. 14 years experience.
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    Former ASE Master Tech

    Satisfied Customers:

    2406
    ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector
  • http://ww2.justanswer.com/uploads/SU/supermechanic/2013-8-23_03546_500.64x64.jpg Jerry's Avatar

    Jerry

    Master Mechanic

    Satisfied Customers:

    2123
    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    992
    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes