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smoke coming from oil fill cap on 1KZ TE, 1997 Diesel

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  • smoke coming from oil fill cap on 1KZ TE, 1997 Diesel

    Hi.
    greetings from Pakistan.

    I have 97 TZ Prado, which has 190000 kms on odometer. I change the oil and oil filter regularly at 1500-2000 kms to avoid major engine breakdown problem. I live in a dry hot tropical region so I use Castrol GTX 20W-50 mineral oil.

    My vehicle is consuming excessive oil now a days and a clear smoke can be seen from engine oil cap too. The mechanic said the engine needs overhaul but I am not satisfied with his tech abilities and no other mechanic nearby yet. I take care my vehicle and regularly change the oil so the rings or piston should not be a problem at all.

    Can any guru here suggest an engine overhaul too or anyone else faced such problem in fast and what measurement he/she took for this problem?

    thanks in advance for your suggestions/opinions.

    Regards

  • #2
    It sounds like it might be blow-by, has it happened suddenly or over weeks/months? How is the air filter? Is it torn or not fitted correctly? If so, perhaps you have "dusted" your engine. Diesel engines especially can wear the bores pretty rapidly if run without filtration. I would get a compression test done (better still, a leakdown if you can find someone able), that could narrow down the cause. Oil consumption would suggest rings, compression test should show this.
    Let us know how you get on.
    cheers
    Steve

    Comment


    • #3
      Originally posted by t303 View Post
      It sounds like it might be blow-by, has it happened suddenly or over weeks/months? How is the air filter? Is it torn or not fitted correctly? If so, perhaps you have "dusted" your engine. Diesel engines especially can wear the bores pretty rapidly if run without filtration. I would get a compression test done (better still, a leakdown if you can find someone able), that could narrow down the cause. Oil consumption would suggest rings, compression test should show this.
      Let us know how you get on.
      cheers
      Steve
      it didnt happened suddenly though. the air filter quality is not good. Its chinese type of air filter which was available locally. I also suspect the dust enter into engine via air filter. diesel tech and good mechanic are not available at this town. I need to travel almost 800kms to find a decent mechanic.

      Anyhow I took its fuel pump for overhauling with new injector as diesel quality here is not good. New air filter, diesel filter and fuel pump arrived today and I will install them tom.

      I also bought diesel intake carb cleaner from liqui moly. Later I am thinking to flush the engine with new engine oil from liqui moly after contacting liqui moly headquarter Germany. they suggested me Liqui Moly Super Low Friction Motor Oil MoS2 15W-50 or MoS2 Leichtlauf 10W-40. Lets hope this new oil would bring some ease both on engine and my mind.

      i will keep you updates.

      Regards
      Jamal

      Comment


      • #4
        Hi Steve,
        My vehicle suddenly stop one day due to fuel pump failure. Next day after cranking many times, I checked the oil the dipstick was low below the minimum mark. I put two extra liters of oil to mark it level. Then We took out the fuel pump and give it for overhaul and the intercooler was also washed with petrol.
        After two weeks, pump was installed with new fuel and air filter, I used liqui moly diesel engine carb cleaner at 2000 RPM and then took a long drive for about 30 minutes.

        Next Morning, dipstick was showing above the maximum mark as if I put two extra liters of oil into engine.

        I don't know what the heck is just going on ? I am about to order liqui moly molygen 15w50 with engine flush for better performance.

        Please advise on this issue
        Jamal albalushi
        Lurker
        Last edited by Jamal albalushi; 28-02-2017, 01:10 AM.

        Comment


        • #5
          So it appears that it is not actually burning the oil? You need to establish if it is actually burning the oil as suggested in you first post, and if so at what rate it is consumed. Check the oil cold only, note the level , then watch it over a few weeks. The oil is not milky is it? It should just be black after a few hours of running. If it is not leaking out, then any reduction must be burning. No excess smoke out the exhaust? If the level is increasing then the extra volume of liquid can only be fuel or coolant. Fuel would be near impossible as it would require an injector to be open and leaking in fuel, you say the injectors have just been done. Coolant will make it milky, and the coolant level will drop.
          If you find that it is in fact burning oil, I would get the compression test done.
          t303
          Senior Member
          Last edited by t303; 28-02-2017, 09:05 AM.

          Comment


          • #6
            Hi, if by smoke you mean compression (white air) blowing from oil cap while the engine is running then that means your engine is loosing compression and needs an overhaul .

            do you also have cold start problems?
            oil consumption, is an indicator of bad piston rings.

            i would go by a compression test to be 100% sure.

            Comment


            • #7
              If I go for compression test, what part would I need to replace ?
              I have no labor charges but I am scared of low quality spare parts available locally and mechanic skills, as they are self learned mechanic. They don't have proper guages like that of dealers and no proper machine shop here. Besides Japanese used engine are available at the distance of 850 Km away from my location at the price of 1000-1500 USD. but again nobody can determine their milage.
              I bought this vehicle 10 years ago at 7500 USD as second hand vehicle imported from Japan. Now its current price is hardly 4000USD. My brother advising me to sell this Prado and buy used Toyota Surf/4runner Petrol freshly imported from Japan. but I love this vehicle and diesel power. Besides it needs some denting and painting work as it has got one bullets mark on right front fender due to aerial firing by some idiots. Kindly advise. I watched some ceramic gel product videos on youtube which can be pour into engine for proper ceramic coating on internal engine parts. which I can only import from abroad with high shipping charges and taxes, don't know if those ceramic coating resolve the issues of engine blow by maybe you guys can suggest about the reliability of those ceramic gel coating.
              Jamal albalushi
              Lurker
              Last edited by Jamal albalushi; 01-03-2017, 06:39 PM.

              Comment


              • #8
                A compression test will tell you where the "leaks" are in your combustion chambers, which may in turn tell you where the oil is going.
                We are trying to assist you, I am putting you on the most economic diagnostic process path, but you need to answer and test things as they are suggested. I have NO IDEA what parts to replace unless I get more information. If you want an answer immediately without going through the process, then my answer is: replace the engine and I am 99% sure you will fix the problem.

                So, can I ask again, is the engine actually using oil, is it milky, is the level increasing as you have suggested???

                cheers
                Steve
                t303
                Senior Member
                Last edited by t303; 03-03-2017, 07:21 PM.

                Comment


                • #9
                  Originally posted by t303 View Post
                  A compression test will tell you where the "leaks" are in your combustion chambers, which may in turn tell you where the oil is going.
                  We are trying to assist you, I am putting you on the most economic diagnostic process path, but you need to answer and test things as they are suggested. I have NO IDEA what parts to replace unless I get more information. If you want an answer immediately without going through the process, then my answer is: replace the engine and I am 99% sure you will fix the problem.

                  So, can I ask again, is the engine actually using oil, is it milky, is the level increasing as you have suggested???

                  cheers
                  Steve
                  Hi Steve,


                  The engine is not burning oil noticeably. Actually I put two extra liters of oil into it mistakenly. But there is strong "blow by" which can be seen and feel through engine oil cap. Whereas engine oil is not milky and its level not increasing even.
                  Its dusted as I can see dust inside air filter hose. I have not checked the turbo blades yet.
                  So my question is can engine flush with new engine oil would reduce its dusted condition ? Or Do you have any other remedy for this?
                  Regards
                  Jamal albalushi
                  Lurker
                  Last edited by Jamal albalushi; 15-03-2017, 01:38 AM.

                  Comment


                  • #10
                    Flushing the engine will only remove the dirt, not replace any wear that has occurred, ie you cannot replace metal and restore compression. A compression test will give an idea of how bad the wear is. If the rings are worn, you get more blowby.
                    Listen carefully:


                    GET A COMPRESSION TEST DONE!

                    Only then can you have an educated guess as to whether you need an overhaul.

                    Cheers
                    Steve


                    By the way, did I mention that you should get a compression test done? :-)

                    edit: another way to check for a dusted engine would be to get an oil analysis done on your old oil, but I don't know whether you would have access to the service. High silicon and metals can point towards damage.
                    t303
                    Senior Member
                    Last edited by t303; 15-03-2017, 08:42 PM.

                    Comment

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