Chevrolet Q&A

Ask Your Question

2003 Chevrolet Monte Carlo Question: 3.4 ENGINE KEEPS GETTING HOT

 

Question

GARY1988, Potwin, KS, January 30, 2014, 12:51
 Rookie

FLUSHED COOLING SYSTEM, REPLACED WTR PUMP & THERMOSAT.WILL WORK FINE TILL I GET GOING ABOUT 1 MILE. STARTGETTING HOT. I CAN STOP PUT IT IN NEUTRAL GIVE IT SOME GAS AND IT WILL COME DOWN TO A NORMAL RANGE WITH NO HEAT COMING OUT. IF I PARK IT WILL STAY IN THE NORMAL RANGE WITH NO HEAT. BUT, IF I STEP ON THE ACCELERATOR HE HEAT WILL START. HAS SEVERAL MECHANICS BAFFLED. ALSO IF IT GETS TOO HOT I WILL LOOSE COOLANT BUT HAS NEVER LOST MORE THAN A HALF GALLON SINCE I STOPPED. FANS DO COME ON ALSO WHEN IT GETS VERY HOT. MECHANICS HAVE ALSO RULED OUT HEAD GASKET BY PUKKING SOME PLUGS.

3 Answers
Flag This
  • Medium-star Best Answer
    G. T. Service Center (4142 Answers) , Stephenville, TX - (254) 638-3236
    ProfessorG January 30, 2014, 12:54
    Profile_thumbnail
     Master

    Replace the radiator.

    Reply
    Flag This
  • Answer #2

    Greg's Orange Auto (13211 Answers) , Orange, CA - (714) 361-9386
    globalhelper January 30, 2014, 12:56
     Master

    poss radiator blockage, but have cooling system chemical tested for head gasket isuue. sounds like a coolant flow issue. was cooling system bled properly after replacing water pump and therm?

    Reply
    Flag This
  • Answer #3

    sarahann2u February 20, 2014, 16:27
     Rookie

    not an answer but i am having same problem. i have replaced thermostat, water pump and heater hose. one says it probably is a blockage in radiator bc the coolant is flowing properly. I think i need a new radiator bc i did put 2 different kinds of stop leak in it.

    Flag This
  • Reply

    ProfessorG, February 20, 2014, 19:39
    Profile_thumbnail
     Master

    That could be an issue. If it idles and doesn't overheat very quickly but overheats quickly while driving it's your radiator.

    Reply
    Flag This