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  • Shaking - vibrating when idling cold

    Dear all,

    I have the below issue and nobody in Greece (Toyota or non Toyota Dealer) can tackle it since diesel engines are not used so much and for that reason, there is no really experienced technicians to identify the problem.

    When I bought the car (LC120 with diesel 3 litters engine 1KD with approximately 158 hp) I knew that there was a problem with the injectors and I changed them immediately with the original ones from Denso. (It had 118.000 km)

    The problematic injectors were causing the engine to shake – vibrate while idling only when it was cold. The shaking was strong enough to shake the whole car body… don’t imagine a strong shake!! It was just a very light one that you could identify only if you are familiar with technical staff.

    After I changed the injectors, it disappeared.
    Just after 15000km this shake while idling and with cold motor started to return... At eh beginning it was very light but during the next 10000km it becomes almost the same with the old injectors.

    I have gone through several tests in several Toyota dealers and nobody can find anything. The injectors are performing well according to the PC (when you plug it). I have also gone to some BOSCH dealers who are specialized on diesel injectors and pumps. They also cannot find anything (by checking the engine or even plugging the PC on.

    Some of them told me that one of the engine mounts might be faulty and it could cause this vibration which is heavily reduced when the engine is warmed up. I could agree but the fact that the engine has a strange noise that is not appearing all the time (something like a valve is not functioning well) along with a rattling that is more frequent than the past is making me think that it is not the engine mount.
    To say again, it appears only while idling. This means that it is not a problem in transmission or any other part of the vehicle since the car is not moving when it is shaking. When the engine has higher rounds per minute, there is no shaking…
    Has anyone faced the same issue? Does anyone have any thoughts?

    Thanks in advance for any useful comment.
    spyrosfly
    Lurker
    Last edited by spyrosfly; 17-01-2017, 02:33 AM.

  • #2
    If injectors being out of spec has definately been ruled out, I'd agree that the engine mounts are the next likely issue.

    My old 120 used to do that same in winter and only when engine was cold, particularly in reverse gear. If the shake/rattle goes away once engine is warmed-up then the mounts will be the issue.

    I understand this is not a cheap fix and learned to live with it as it was only cold enough here for a few months of the year for it to be a problem!
    Cheers
    Micheal.

    2008 GXL D4D Auto. GOING... GOING... GONE
    2015 GXL 1GD Auto. And it begins again...

    Comment


    • #3
      Originally posted by 120D4D View Post
      If injectors being out of spec has definately been ruled out, I'd agree that the engine mounts are the next likely issue.

      My old 120 used to do that same in winter and only when engine was cold, particularly in reverse gear. If the shake/rattle goes away once engine is warmed-up then the mounts will be the issue.

      I understand this is not a cheap fix and learned to live with it as it was only cold enough here for a few months of the year for it to be a problem!
      Such problem is welcome for me since I am avoiding the problem in the engine.

      What worries me is the strange sound of the engine (not occurring all times) on load or while using it for braking (I have manual transmission)

      As said above the engine's noise is like one cylinder is starving or there is a problem with one valve.
      I say again. Such symptoms are very light and difficult to identify even from the technicians that are not familiar with this car.
      My blessing (or curse...) is that I am an electrical engineer quite active on mechanical stuff and I can identify issues from a quite early stage...

      If it is the engine mount, I can change them by myself (and maybe the help of another friend since this specific work requires more than 2 hands...)

      Comment


      • #4
        there have been some issues with the suction control valve

        some questions for you
        does your car have the EGR set up like we have here?
        does your car have 1 or 2 fuel tanks?

        if there is 2 has the centre fuel filter been changed?

        i do agree the shaking at idle sound very much like engine mounts
        2008 Dune D4D manual GXL update - with lots of fruit !! + Roma Razorback Off Road Van

        Comment


        • #5
          Originally posted by Razorback81 View Post
          there have been some issues with the suction control valve

          some questions for you
          does your car have the EGR set up like we have here?
          does your car have 1 or 2 fuel tanks?

          if there is 2 has the centre fuel filter been changed?

          i do agree the shaking at idle sound very much like engine mounts
          Yes it has EGR which is cleaned just 1 month ago. It didn't have a lot of waste in it anyway. From my knowledge it couldn't be poor air intake from the EGR since EGR is feeding all 4 cylinders. In case of blocked EGR, you have problems on acceleration since such issue is affecting all 4 cylinders. not just one. the shaking is similar to problematic cycle in one out of four cylinders...
          the same goes for the fuel filter...
          I have only one tank

          Comment


          • #6
            Hi, simple question - do you check the glow plugs?

            Comment


            • #7
              Originally posted by sandr View Post
              Hi, simple question - do you check the glow plugs?
              Toyota said that they are ok...
              As I said, I don't trust their short experience but does it makes sense that one faulty glow plug would create that shaking? If we have a faulty glow plug, such issue would be shown on ignition and not even after 10 minutes that the engine is running. Am I right?
              If not, why the glow plug would affect the operation of an engine that is already started and running?

              Comment


              • #8
                http://www.moranbahweather.com/toyot.../m_05_0643.pdf

                Comment


                • #9
                  Thanks a lot!
                  I will check and tell you...

                  Comment


                  • #10
                    Engine mounts are the number 1 issue of heavy vibration at idle cold. Worse in D or R, worse in low.

                    Comment


                    • #11
                      Originally posted by Anth120playdo View Post
                      Engine mounts are the number 1 issue of heavy vibration at idle cold. Worse in D or R, worse in low.
                      I realise this is an old thread but rather than start a new have a query about the engine mounts, my D4D 120 with 220000km on it intermittently when you select reverse shudders horribly mainly if under load on slight incline and cold but sometimes on the flat also. Never felt in drive and when it happens if I shift into neutral shudder stops. Replaced the auto fluid (well overdue)hoping that was the culprit with no success although gear changes now overall are much smoother still have experienced the shudder in reverse. If I had a faulty engine mount wouldn't I expect the shudder every time in reverse? not intermittently? have searched forum and web but keen to hear if others with engine mount problems have felt shudder all of the time. Cheers Mick
                      09/08 Prado GX D4D White, Auto, Option Pack 1, Soveriegn Bull Bar, 2" Ironman lift, Ironman snorkel, catch can gone EGR blank with 6mm hole installed

                      Comment


                      • #12
                        Mick that's almost certainly an engine mount failure. They are vacuum/pressure assisted and are especially prone to the shake when the engine is cold and it's trying to balance the inherent diesel shake.

                        You'll find it worse in winter too...

                        p.s the cost of repairs vs the cost of parts will make your toenails curl unfortunately.
                        Cheers
                        Micheal.

                        2008 GXL D4D Auto. GOING... GOING... GONE
                        2015 GXL 1GD Auto. And it begins again...

                        Comment


                        • #13
                          Michael, Thanks for the reply. I'm kind of happy if it's the engine mounts was worried the auto had issues the oil was horrible. Did you have engine mount issues with your 120?
                          09/08 Prado GX D4D White, Auto, Option Pack 1, Soveriegn Bull Bar, 2" Ironman lift, Ironman snorkel, catch can gone EGR blank with 6mm hole installed

                          Comment


                          • #14
                            Unfortunately I and many others have had the same issue - i lived with it but hated winter as it didnt do it in summer!
                            Cheers
                            Micheal.

                            2008 GXL D4D Auto. GOING... GOING... GONE
                            2015 GXL 1GD Auto. And it begins again...

                            Comment


                            • #15
                              No worries I'll put them on my to do list
                              09/08 Prado GX D4D White, Auto, Option Pack 1, Soveriegn Bull Bar, 2" Ironman lift, Ironman snorkel, catch can gone EGR blank with 6mm hole installed

                              Comment

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