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Thread: Toyota Corolla 2.OD (2C Engine) Tuning & Preventive Maintenance

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    Default Toyota Corolla 2.OD (2C Engine) Tuning & Preventive Maintenance

    Dear Friends,

    For Diesel Engines i have heard that only keep changing the Engine Oil on time and no need of any other kind of Tune up or Maintenance unless you feel some problem or problem really comes to you.

    Please discuss and clarify according to your knowledge and experience, as soon again Corolla 2.OD sale will go high as CNG is becoming headache rather than any benefit. So here i am expecting high number of replies to get clarify for Diesel Engine Tune ups and Preventive Maintenance.

    Life is a chain of moment of enjoyment and Obedience to Allah, not only about survival

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    Quote Originally Posted by Porsche_Maker View Post
    @subzwari

    Have u used it??
    Yeah usually once in 2 - 3 months time....I prefer to pour it (STP Diesel Treatment) before a long highway run like going to lahore via motorway...
    I can feel some difference...specially the marbly sounds in the morning and the mileage....I keep a record of re-fueling and stick to just one or a couple of fuel stations in city.... so that the vehicle fuel effeciency is monitored quite strictly....

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    In addition to above if some one can mention other indicators and the ways to monitor them.....

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    @dejavoo
    You means u got Overhauled already less then 150k km.

    @Xulfiqar
    Can you please elaborate about Extra Fuel Phenomenon?? b/c Extra or less fuel will harm any of the Motor
    Life is a chain of moment of enjoyment and Obedience to Allah, not only about survival

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    excess fuelling means when you have black smoke from your tailpipe - excess fuelling in a diesel means higher combustion temps which lead to melted pistons etc..
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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    Black smoke doesnt means Excess Fuel all times as Pk Diesel Rocks
    Life is a chain of moment of enjoyment and Obedience to Allah, not only about survival

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    yeah...and also that the air filter gets clogged so quickly...there is no way one can get away with throwing black smoke....
    It becomes an awful site in the side mirror if I dont get it cleaned for more than a couple of weeks....

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    yeah especially last couple of months have alot of dust so Air Filter was suffering alot, also i try to keep one new as spare at home. Also clean it at around 1000km and change it at 8000 to 10000km, while using original Toyota.
    Life is a chain of moment of enjoyment and Obedience to Allah, not only about survival

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    less air more fuel = excess fuelling. AND its not about diesel quality, I have run my car on a cocktail of used auto trans oil/engine oil, kerosene and petrol, it worked and travelled me a good 600 kms back to karachi. with no problems other than I had to keep myself from going full throttle because engine oil outs an awful lot of BTUs when burned as compared to regular diesel fuel oil. It still starts on first key

    just keep your air filter and valve clearances in check - all will be well - tight clearances will result in air backwash out of the inlet mani and cause overfuelling
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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    @Xulfiqar

    Hows abt getting the Valve Clearance, whts the method and period to get it done.
    Life is a chain of moment of enjoyment and Obedience to Allah, not only about survival

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    Hello @Xulfiqar,

    I wanted to ask if i have valve clearance issues if i'm starting to hear ratchetty clicking noise on my 2C engine. I have the non-turbo which has a vacuum pump on top of the valve cover.

    I started to notice the noise about 3 weeks ago, and so I changed the oil and used Caltex DELO Gold (as I have alwayse used) hoping to eliminate the noise by using new oil.

    Btw my CSD device has long been disabled since I got the vehicle, so i'm ruling out an overly advance I/P timing.

    I also noticed that the ratchetty noise silences when I back-off the throttle, but once the engine goes back to idle and acceleration, the ratchetty noise comes back, timing belt??

    Thanks mate!!

    Ed aka Dongskie
    Scientia Maxime Cuum Virtute '92

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    Quote Originally Posted by Dongskie View Post
    Hello @Xulfiqar,

    I wanted to ask if i have valve clearance issues if i'm starting to hear ratchetty clicking noise on my 2C engine. I have the non-turbo which has a vacuum pump on top of the valve cover.

    I started to notice the noise about 3 weeks ago, and so I changed the oil and used Caltex DELO Gold (as I have alwayse used) hoping to eliminate the noise by using new oil.

    Btw my CSD device has long been disabled since I got the vehicle, so i'm ruling out an overly advance I/P timing.

    I also noticed that the ratchetty noise silences when I back-off the throttle, but once the engine goes back to idle and acceleration, the ratchetty noise comes back, timing belt??

    Thanks mate!!

    Ed aka Dongskie
    Tappet check krwao ap.

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    @Dongskie tappets check krwao ap.

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    Quote Originally Posted by akrajput View Post
    @Dongskie tappets check krwao ap.

    Hello my friend, I have checked all my gaps and everything is in specified clearances, 0.25 Intake and 0.30 Exhaust, but there is still that ratchety noise..

    Could it be a bad diesel fuel?
    Scientia Maxime Cuum Virtute '92

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    I think problem is due to your disabled CSD. Let Zulfiqar bhai confirm it.

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    Quote Originally Posted by Salman922 View Post
    I think problem is due to your disabled CSD. Let Zulfiqar bhai confirm it.
    My CSD have long been disable since I got the vehicle and the ratchetty noise wasn't there before.

    I noticed the ratchetty sound after I switched petrol stations, I used to gas up at PETRON then tried TOTAL recently, could it be the Diesel fuel?

    Friends suggested me to add 100ml of 2T oil per 20Liters of diesel to soften up the ignition or something to that effect.

    thanks friends!
    Scientia Maxime Cuum Virtute '92

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    I have been reading in other diesel threads and sometimes they call this sound phenomenon "injector nailing" and or "ignition knock"

    I am beginning to believe that my problem might be with my injectors, since I have noticed that when I back-off the throttle when coasting or doing an engine brake, that ratchetty sound is totally gone, the sound returns when the engine idles and accelerates.

    Hmmmm... I know its not the end of the world situation for my 2C engine but the sound kinda irritates me as it was never there before.
    Scientia Maxime Cuum Virtute '92

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    Quote Originally Posted by Dongskie View Post
    Hello @Xulfiqar,

    I wanted to ask if i have valve clearance issues if i'm starting to hear ratchetty clicking noise on my 2C engine. I have the non-turbo which has a vacuum pump on top of the valve cover.

    I started to notice the noise about 3 weeks ago, and so I changed the oil and used Caltex DELO Gold (as I have alwayse used) hoping to eliminate the noise by using new oil.

    Btw my CSD device has long been disabled since I got the vehicle, so i'm ruling out an overly advance I/P timing.

    I also noticed that the ratchetty noise silences when I back-off the throttle, but once the engine goes back to idle and acceleration, the ratchetty noise comes back, timing belt??

    Thanks mate!!

    Ed aka Dongskie
    Understand this.

    The valves open and shut at an abrupt rate; and do make a open and close noise.
    however that is not the type of noise that you can easily hear on a running engine.

    The sound that you are referring to maybe because of two reasons

    a. The valve clearance is messed up
    b. you have screwed up the valve stems.

    See this figure

    Toyota Corolla 2.OD (2C Engine) Tuning & Preventive Maintenance - valve adjustment

    The valve clearance used on old engines is to allow for the valves to open enough and allow either the intake operation to complete or the exhaust stroke to complete.

    When people F up with the clearance beyond the manufacturer's specs, what they are doing is increasing intake time and reducing exhaust or vice versa.

    Over a period of time, this just destroys all the precision components and the worn out loose valve stems make a metallic clicking noise.

    The symptoms you have described are in line with this diagnosis.

    Now, have a look at this figure

    Toyota Corolla 2.OD (2C Engine) Tuning & Preventive Maintenance - 528535d1374448356 where source m119 aluminum camshaft oiler img 3456

    This is a M119 engine that I mostly work with; notice that there is no rocker arms or the traditional "Tappets".

    Under the cam lobe you can spot a smooth cylindrical piece of metal ( also called bucket Tappets ).

    These are precision cut to FIX the valve clearance issue and not allow mechanics to F around.

    If your particular car's engine has those, you may need to replace them.

    They look like this

    Toyota Corolla 2.OD (2C Engine) Tuning & Preventive Maintenance - Valve Lifters

    Get the originals, and don't let anyone modify them, or use any abrasive at all.

    If you cam is beyond specs, change that too.

    You will notice that Hamony will come back, and the engine will get a huge power boost !

    Lastly, always use the manufacturer spec oils ONLY ( there is a reason they make those specifications )

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    injector nailing is a very loud clacking noise - almost like hitting a hammer on a steel object sound and is timed to the injection of the fuel for a given cylinder, meaning its frequency would be low.

    You can test your injectors break pressure and spray pattern to see if the injector is indeed nailing. However if this noise is high frequency (indicating multiple cylinders) and is only on cold start in winters and disappears when warmed up then its a bit normal for an IDI engine - almost all of them do that.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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