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Toyota engine repair questions and answers

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  • AutoMD Member
    AutoMD Member - 2004 Toyota Corolla - Engine - 2/19/2014
    .5gal of water in empty radiator. Ok to add 50/50 pre diluted coolant in radiator reservoir?
    Please help. My car's radiator/engine temp gauge was hot so my mechanic put 1/2 gal of water in the Radiator . Before that, he said my overheating was due to lack of coolant. My temperature gauge maintained midway temp and he advised me to add coolant in the ...
    • HouseCallAuto
      2/19/2014 HouseCallAuto
      Do not add it to the reservoir, add directly to the radiator, slowly until the radiator is full. Then start the car and let it idle and when the coolant level begins to get lower in the radiator add more and keep doing that until it does not drop anymore and the coolant should be warm or hot to the touch with dipping your finger into the radiator neck. It can take 5 or 10 minutes of watching for the thermostat to open and the level to drop and all the air to get purged out but it will happen. At some point turn the heater on and confirm that the car is blowing out heated air. It is perfectly ok to run the engine with the radiator cap off for as long as it takes for the cooling system to stabilize and then put cap back on. Also, do you have an idea why the coola nt level was low or why it overheated? It usually means there is a leak someplace. If you just add coolant it will be ok until it leaks down low again and then will overheat again. And yes, the 50/50 will be ok.
  • AutoMD Member
    AutoMD Member - 2011 Toyota RAV4 - Engine - 2/19/2014
    How do I replace bank 1 sensor 2 without disassembling interior console?
    Wiring disappears into the frame.
    • Jimm
      2/19/2014 Jimm
      Is this a question regarding the bank 1 snsor 2 oxygen sensor (O2 sensor) located on the exhaust system? If yes, why would you be concerned with the interior console for the oxygen sensor replacement?

      Simply disconnect the old O2 sensor wiring connection at the sensor. Then, using an oxygen sensor deep socket - unscrew / remove the old sensor. Sometimes the old sensors can be corroded - so a spray of thread lubricant to the base of the old sensor (remove the old sensor when the vehicle / engine is cold) and given time to left soak in - will help the removal process.

      Be sure to place a light coating of anti-sieze / thread lubricant on the new sensor threads before the installation.

      You might reference the 'How-To-Guides' feature on the AutoMD website for the specific steps to changing the O2 sensor.

      The parts are readily available from these many on-line sources,,,,, - to list only a few possibilities.
      In fact, they (RockAuto) list the oxygen sensors from around $44.00 for your vehicle.

    • HouseCallAuto
      2/19/2014 HouseCallAuto
      The connector I believe is anchored under the console / carpet and unless you remove the console you can't do it. Some vehicles I have run into I was able to pull on the wire and the connector simply went through the access hole after the rubber seal was pulled downward. Not sure if you already tried that but I would try this first. If you do have to remove the console, don't panic or let this stop you BUT do get a detailed manual with the step by step with the pics so that you do not break anything.
  • AutoMD Member
    AutoMD Member - 2007 Toyota Camry - Engine - 2/18/2014
    What damage could this do to my engine?
    I took my Toyota Camry (69000 milage on vehicle) for engine oil change. They did put any oil in it since there was no sign of oil on the dip stick. I have driven it for 15 mins total of 2 miles local + 8 miles freeway. I saw low engine pressure light flicker on and ...
    • HouseCallAuto
      2/18/2014 HouseCallAuto
      Someone else besides the place the did the oil change has to examine this. There could be damage that will not show up now or there could be damage now. Driving 15 minutes with no oil pressure? That can kill an angine quicker than 15 minutes. What matters most here is how many minutes the engine was actually running with you seeing the low oil pressure message. You can be low on oil but not empty and there is a huge difference between the two. No reading on dipstick does not mean totally empty but of course could be. The only thing that may be in your favor here is if it was underfilled (not empty) in which case no damage is likely.
  • soonersbigb82
    soonersbigb82 - 2003 Toyota Tundra - Engine - 2/16/2014
    Ok I replaced radiator and ever since my a/c and heater doesn't work. What could b my problem?
    Well where the radiator screws on the housing that the cap screwed on basically fell apart. So I replaced radiatior. Before I replaced it the a/c and heater worked great. But ever since neither the a/c or the heater works. At first I thought it was just the a/c ...
    • CVO
      2/16/2014 CVO
      1.Air pockets trapped in the cooling system can cause the engine to loss their supply of coolant efficiency to the heater core. Some cooling systems have air bleed valves built into the system to aid in the removal of air pockets. Advice: For many cooling systems, the method of removing air pockets is to start the engine and allow it to run with the radiator cap off or loose until all the air escapes from the neck of the radiator. For some systems this method is not sufficient, and the manufacturer has installed air bleed valves usually near or on the thermostat housing.
      2. Check the heater hoses run from the engine to the heater core. The return heater hose back to the engine must be hot in order to make the heater core works. In the event, if that hose doesn't get hot then the heater is clogged. Replace the heater core.
  • AutoMD Member
    AutoMD Member - 1999 Toyota 4Runner - Engine - 2/15/2014
    Misfire is cylinder one
    Recently my 4runner started vibrating really bad. Mostly when I'm braking and come to a stop or when I'm going a faster speed on the freeway. Check engine light came on I had it checked and it came up with a misfire in cylinder one so I replaced all spark plugs and ...
    • HouseCallAuto
      2/15/2014 HouseCallAuto
      Replace cylinder #1 fuel injector. This is not a sure thing but if you want to go through the trouble to confirm this without actually having to buy a new $100 injector just yet, try swapping the #1 injector with another cylinder and see if the misfire code moves with the injector to confirm. If it does change to the other cylinder then you can buy a new injector and take the time to buy it online cheaper than the auto parts stores.
  • AutoMD Member
    AutoMD Member - 2008 Toyota Sienna - Engine - 2/14/2014
    What would cause my AWD vehicle with 60K miles to drop from getting 19MPG to 13 MPG over the past 9 months?
    It dropped from 19 to 17 very slowly and then it suddenly started dropping about 1MPG with each fillup over the past month
    • HouseCallAuto
      2/14/2014 HouseCallAuto
      Unknown until some data from a professional scanner is viewed and a check for any fault codes. At the very least, confirm the air filter is clean, tires are inflated to correct pressures and clean the mass air flow sensor with dedicated MAF sensor cleaner. How does it run?
      2/14/2014 AutoMD Member
      I change the air filter every 10K miles and my synthetic oil & filter every 5K. The dashboard tire sensor light warns me when the air drops to 32 PSI from the recommended 35 PSI. I just had the oil and filter changed, air filter changed, and tires rotated several weeks ago. It runs fine, but I sense something different. It doesn't purr like it used to, if you know what I mean..
  • AutoMD Member
    AutoMD Member - 1994 Toyota Camry - Engine - 2/14/2014
    • John's Auto Repair
      2/14/2014 John's Auto Repair
      Your best move to make is to have the cooling system and the cap pressure checked. Could be anything
      from a stuck thermostat to a blown headgasket. This procedure will let you know.
  • alanspse
    alanspse - 1989 Toyota Pickup - Engine - 2/12/2014
    Why has my engine lost power
    I just had a new exhaust pipe and muffler installed it had plenty of power when the exhaust was broke in front of the converter but now it wont pull out of 2nd gear seems like it's suffocating I didn't have a converter installed to save money and I don't think they ...
    • John's Auto Repair
      2/12/2014 John's Auto Repair
      Well, then i would take it back since it ran fine before the exhaust work. Obviously, something
      in the exhaust is restricted. I would think the Catalytic Converter is fine since it is connected
      before the exhaust work.
  • AutoMD Member
    AutoMD Member - 2003 Toyota Tacoma - Engine - 2/12/2014
    What can cause my Tacoma's lack of acceleration at stoplights or onto an interstate on ramp?.
    mileage = 99,000 +. No work done on this problem. Happens pretty much all the time. Happens from any standing stop then to go. I've noticed it for approx. 2 yrs. now. check engine light isn't on. No other warning lights are on.
    • John's Auto Repair
      2/12/2014 John's Auto Repair
      I would try a new fuel filter. Then check fuel pressure. Also the exhaust could be restricted.
      A quick test for this is to remove the Oxygen sensor and test drive. If engine seems to be
      running a little better, then somewhere in the exhaust system is restricting exhaust flow.
      Typically it's the Catalytic Converter.
  • AutoMD Member
    AutoMD Member - 2003 Toyota Tacoma - Engine - 2/12/2014
    What can cause my Tacoma to lack acceleration at stoplights and/or interstate on ramps?
    mileage = 99000+. No work done yet. Happens all the time. Getting going from a stand still. First noticed it about 2 yrs. ago. No check engine light on. No other lights either.
    • HouseCallAuto
      2/12/2014 HouseCallAuto
      Have to plug in a code reader and see if any codes are stored even though light is off, codes can still be there. You can obtain a code reader from for around $20 with shipping incl.
    • Jimm
      2/12/2014 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires
  • AutoMD Member
    AutoMD Member - 1991 Toyota Previa - Engine - 2/10/2014
    How do I change fan belt ?
    fan belt needs to be replaced i want to do it myself. how do I doit? Is there a diagram to show me step by step?
    • Jimm
      2/10/2014 Jimm
      Use the 'How-To-Guides' feature on the AutoMD website - step-by-step including photos. The parts are readily available from these many on-line sources,,,,, - to list only a few possibilities.
      In fact, they (RockAuto) list the serpentine and other accessory drive belts from around $2.50 (each) for your vehicle
  • AutoMD Member
    AutoMD Member - 2001 Toyota Corolla - Engine - 2/10/2014
    Turn car on loud grinding noise from front , ck pwr steering fluid , filled, check belt seemed fine
    tried to take to mechanics , heat gauge went up and turning on hear did not seem to help
    • HouseCallAuto
      2/10/2014 HouseCallAuto
      I suspect that you have a bad water pump. Grinding can be from a bad water pump bearing and with the bearing bad the pump will usually leak coolant causing your cooling system to be low and causing the engine to run hot.
  • AutoMD Member
    AutoMD Member - 1996 Toyota Tercel - Engine - 2/7/2014
    Car shaking, rattling, and is very loud.
    I have a '96 Toyota Tercel, and I live in Ohio so it's been extremely bitter cold this winter and that's when this problem has started happening. The car is rattling and shaking really loudly whenever I go past 30-40mph, and overall just has issues accelerating. ...
    • HouseCallAuto
      2/7/2014 HouseCallAuto
      You need to narrow down some detail for me. I need you to determine if what you are feeling / hearing is a result of the engine running poorly or a result of something relating to the suspension / tires / etc which is a separate thing from the engine. Please better describe what you are hearing feeling so that maybe I can make that determination.
  • AutoMD Member
    AutoMD Member - 1995 Toyota Camry - Engine - 2/4/2014
    Why does my car die every time I switch to drive, or when I come to a stop?
    It started out as our oil pump gasket leak. Now it dies. It doesn't matter if it is cold or warm. I had to replace the distributer cap.
  • AutoMD Member
    AutoMD Member - 1998 Toyota Camry - Engine - 2/4/2014
    How do i change head gasket
    don't leak water from water pump
    • HouseCallAuto
      2/4/2014 HouseCallAuto
      Do not replace the head gasket unless it has been diagnosed as no good. Your details seem to imply that because you have a coolant leak and the leak is not coming from the water pump so that means the head gasket is bad. AutoZone has repair procedures for most cars accessible through their site.
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