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Subaru engine repair questions and answers

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603 Questions
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  • John
    • HouseCallAuto
      5/16/2010 HouseCallAuto
      I'm pretty sure the weight should be 5w30 but check your owners manual.
    • snogroomer
      12/20/2010 snogroomer
      5w30 for the winter and 10w40 for the summer
  • russ
    russ - 1983 Subaru GL - Engine - 12/20/2010
    When replacing the starter, I lost the short bolt. No one, including the dealership, can give me the specs. in order to
    All I need is the bolt size in order to buy a replacement.
    • vince^_^
      7/26/2010 vince^_^
      I can’t find the specification to the bolt that you need. But you can also go to a machine shop they make bolts and other stuff. They can measure it up or make a new bolt for you and rethread the bolt hole in your starter.
    • snogroomer
      12/20/2010 snogroomer
      any standard metric bolt that has the same threads as the long bolt to the starter will work so long as it is the same length as the original shoet bolt
      posting 5 months old think they fixed it already
  • Ray
    Ray - 1998 Subaru Legacy - Engine - 12/20/2010
    What is the location of the knock sensor
    • snogroomer
      12/20/2010 snogroomer
      knock sensor is located in the top center of engine just under the back side of the intake manufild. Just on the right side of the throttle body
      It is underneath the intake manifold. If you look straight down from your throttle body, you will see a sensor with one wire coming out and a bolt going through the middle of it, that is the knock sensor.

  • steady24
    steady24 - 1999 Subaru Impreza - Engine - 12/20/2010
    Security system reset
    In a rush I put the battery terminals on backward for a second and my car has a security system, now I have to push the security button everytime why'll I'm starting it. Is there a way to reset the system?
    • Nissan Technical Advisor
      Yes, but this may require you to use scan tool to reset your seurity system.

      I recommend you to use "Find a Shop" feature of AutoMD for shops nearest you
    • snogroomer
      12/20/2010 snogroomer
      disconnect battery, wait about ten minutes and then reattach battery, then use the remote - lock and then unlock the car....that will reset the codes and that should solve the prblem
  • tane
    tane - 1996 Subaru Legacy - Engine - 12/20/2010
    Were is oil filter were is oil filter
    were is oil filter
    • yboy82
      9/17/2010 yboy82
      Oil filter are usually mounted in your cylinder block near you oil pan. Go under your vehicle and remove the engine splash shield if applicable before you can see the oil filter.
    • snogroomer
      12/20/2010 snogroomer
      oil filter is located on the bottom side of the engine block, in front of the oil pan
  • albert
    albert - 2000 Subaru Forester - Engine - 12/20/2010
    The resevour get fill with fkuid and it does not return back to the radiator what do you thing could be the problem?
    200k miles i replace radiator, termostat, radiator cap, valve job, there is not smell in the inside or stem in the winshield
    • TechSam
      11/22/2010 TechSam
      Maybe there is lots of air in the system, make sure all the air is out if the problem is still there then you may need a head gasket Albert.
    • leonard
      12/6/2010 leonard
      I have a diff. location to look at first. the resevoir cap may be leaking air . the resevoir will only work if air tite.
    • snogroomer
      12/20/2010 snogroomer
      If you burp tank fills from the radiator and doesn't return to the rediator check burp tank for oil residue. If oil residue is present, then it is most likely a bad head gasket, Good Luck
  • Juan Barrientos
    Juan Barrientos - 1995 Subaru Legacy - Engine - 12/19/2010
    Where the tenperature sensor is located?
    • TechSam
      12/19/2010 TechSam
      Temp sensor is normally located on thermostat housing or around there, it has one wire going to it and is grounded to the engine.
  • max
    max - 1986 Subaru GL-10 - Engine - 12/15/2010
    • Bobby
      12/15/2010 Bobby
      your probably only going to find this at dealer or at junk yard.
  • drm
    drm - 2006 Subaru Forester - Engine - 12/15/2010
    Mistakenly filled with diesel fuel
    • ref
      12/15/2010 ref
      Drain diesel fuel and put in new gas.It should be ok after.Could run rough for a short time after.
  • Hans  Broecking
    Hans Broecking - 2000 Subaru Legacy - Engine - 12/14/2010
    Why is there an odor of gas coming through the vents when i turn on the heat?
    I just had an exhaust leak fixed. My mechanic thought that was the source of the odor, but it is still there, just not as thick. It eventually goes away if i'm driving for more than 15 mins. Could something be leaking into the heater core?
      I believe you have a small fuel leak and when you turn the heater on it is sucking vapors into the passenger compartment through the fresh air intake.Check the fuel delivery system,and the fuel lines and all connections to find the source.Good Luck
  • joe joyce
    joe joyce - 2004 Subaru Outback - Engine - 12/13/2010
    Ac shuts off as engine speed varies
    ac shuts off as the engine speed varies
    • yboy82
      12/13/2010 yboy82
      Did you already check for any vacuum leaks? What have you done so far to fix your vehicle?
  • lynda
    lynda - 1991 Subaru Legacy - Engine - 12/11/2010
    Where is the idle air control valve on a 1991 subaru right hand drive legacy
    mechanic said he cleaned it needs to be done again i think
  • lynda
    lynda - 1991 Subaru Legacy - Engine - 12/11/2010
    Why won't car start after running for long period of frequent stop starts,battery is good starter is good,replaced fuel
    replaced fuel pump and filter car still stalls and won't start without a jump or long cool down period
      2 things come to mind with your question 1st you sat wont start with out a jump after running for long period of frequent stop starts sounds like the battery and or alternator to me check them both out advance auto parts will test your battery out by putting a load to it to see if it is good same with the alternator it could have a bad diode going bad to 2nd you say long cool down period after running for long period of frequent stop starts if you mean by turning on and off then it could be your starter going bad when it heats up never the less have them checked out and keep us posted on what you find out............GOOD LUCK>>>>>HAPPY HOLIDAYS
  • shawn
    shawn - 1995 Subaru Legacy - Engine - 12/8/2010
    Why does my 1995 subaru legacy not stat at times
      What is needed for an engine to start

      First, let's see what normally takes to start a gasoline car engine:

      1. The engine must be turned over by the starter motor with enough speed to catch. For this to happen, the battery must have enough charge, the starter motor and the starter circuit should be OK.
      2. Fuel mixed with air in the correct proportion must be supplied to the enigne cylinders;
      3. Spark - there must be a strong spark at the proper moment to fire the air/fuel mixture.
      4. Proper timing - the engine valves should open and close in appropriate time.
      5. Compression - normal compression in the cylinders is 120 - 170 psi. The engine won't start if the compression is lower than 70 - 80 psi.

      If the engine won't start - there's no magic - one of these things is probably missing. Sometimes the problem could be very hard to find, for example, when it doesn't happen at all the times. Often, though, it could be something very simple, like a dead battery.

      If the car won't start, check the basic things first:
      Is the battery OK? - here is a simple way to check battery: How to check the battery.
      Do you have oil in the engine? Is there enough fuel in the tank? - it's a very common situation when the fuel gauge isn't working properly and the car runs out of fuel with the fuel gauge still showing some fuel in the tank.
  • Dom
    • HouseCallAuto
      12/7/2010 HouseCallAuto
      Sensor wire colors vary. The few universal sensors that I have used over the years all came with an instruction sheet that spells out the color codes of what wire color of the sensor goes to what wire color on the vehicle. Your sensor did not have this piece of paper?
      12/8/2010 Dom
      No it had a plug on the other end so no wire info was included. It has the wrong plug ( female instead of male) but it is the right sensor ... ugh
      hi dom if you call the dealer they will be more than helpful to give you the color codes that you are asking for........good luck
      12/8/2010 Dom
      You know i will try that good idea ...