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Thread: Self Tunning - Khyber G-10 (Plugs, valve clearance, spark gap etc)

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    Default Self Tuning - Khyber G-10 (Plugs, valve clearance, spark gap etc)

    Salam

    dear members/experts

    I own a khyber 1996. Recently overhauled its engine completely at home by myself except the mechanist part. It has its first oil change at 1100Km yesterday and i am planning to tune it. I have following query for the learned members/experts

    Q.1. recommended spark plugs for khyber g-10 on CNG
    Q.2. Recommended spark plug gap?
    Q.3. Recommended tappet setting Hot/cold?
    Q.4. Running was on petrol with Caltex Havoline formula and now i have switched to CNG with Shell helix HX7 10-40W (synthetic) , is shell HX7 ok?

    What else should i do or check to get max output and efficiency from my g-10?

    regards


    after-note: In addition to the above queries, this thread also contains info on carburetor, AC, electrical, cooling system, brakes & gear issues related to khyber G-10.

    Special thanks to following experts :
    Xulfiqar, Fas133, Margallar, Ahsanzs, wasay_Ahmad, Xplorer, jz, Daniyal
    for their valuable contributions and last but not least
    I am greatful to Cracked for keeping this thread alive by
    raising all the queries/question.


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    Quote Originally Posted by margallar View Post
    I know that feel bro ,
    Haayee!

    compression test will tell you, first dry test, then pour some engine oil through plug hole and retest, if it goes up to normal figures, it is the rings, if compression stays bad, its the valves.

    Iirc you were running without a t stat. I think your car might need a ring and head job.
    Na na, t-stat valve was never removed and it is working alright with fan on auto.
    I always used coolant, previously used Caltex one and since 2 years using Denso one.
    Compression test was done back in 2012, don't remember the values but it came out to be alright for all three cyl.
    I was also thinking about getting the compression tested again, but was unsure till now.
    One of the most difficult things in the world is to know how to do something, and to watch without comment, somebody else do it incorrectly.

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    Quote Originally Posted by smijaz View Post
    Which engine oil you use and what drain interval?
    Using Zic A.
    I think its 10W 40, (dont remember the exact grade)
    I normally change it at around 3500 kms but this time the interval was more than 5000kms, perhaps 5600kms due to a busy schedule.
    One of the most difficult things in the world is to know how to do something, and to watch without comment, somebody else do it incorrectly.

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    Quote Originally Posted by DUDE007 View Post
    Mention haail filter too
    Haail filter?
    One of the most difficult things in the world is to know how to do something, and to watch without comment, somebody else do it incorrectly.

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    Oil filter.

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    Okay, if the compression comes out fine, retest tappets and mixture, I have a feeling that running too lean can cause it too, btw try delo this time, cheap and my engine noise got much less, previously I was using havoline.

    Btw try to do tappets yourself, saves money and you use the recommended settings

    Btw, 3 years sound long enough, retest compression
    haters gonna hate, potatoes gonna potate

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    Quote Originally Posted by DUDE007 View Post
    Oil filter.
    Using the SGP one since day 1.
    The original japanese one which now costs 750 PKR.
    One of the most difficult things in the world is to know how to do something, and to watch without comment, somebody else do it incorrectly.

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    Quote Originally Posted by daniyalahmad View Post
    Using Zic A.
    I think its 10W 40, (dont remember the exact grade)
    I normally change it at around 3500 kms but this time the interval was more than 5000kms, perhaps 5600kms due to a busy schedule.
    Now you have to shift to SAE 20W-50 and drain interval of 3000kms.
    I would recommend Caltex havoline CNG SAE 20W-50 API SM
    For me the exact issue was resolved by just this change.

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    Quote Originally Posted by margallar View Post
    Okay, if the compression comes out fine, retest tappets and mixture, I have a feeling that running too lean can cause it too, btw try delo this time, cheap and my engine noise got much less, previously I was using havoline.

    Btw try to do tappets yourself, saves money and you use the recommended settings

    Btw, 3 years sound long enough, retest compression
    So compression test is first on my list, Delo what grade?
    One of the most difficult things in the world is to know how to do something, and to watch without comment, somebody else do it incorrectly.

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    Quote Originally Posted by smijaz View Post
    Now you have to shift to SAE 20W-50 and drain interval of 3000kms.
    I would recommend Caltex havoline CNG SAE 20W-50 API SM
    For me the exact issue was resolved by just this change.
    Hmmm...
    What about Delo? Safdar is suggesting Delo. Since its quite cold over here so 20W - 50 will be good or there are chances that it might make the engine feel a bit sluggish?
    One of the most difficult things in the world is to know how to do something, and to watch without comment, somebody else do it incorrectly.

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    Quote Originally Posted by margallar View Post
    Okay, if the compression comes out fine, retest tappets and mixture, I have a feeling that running too lean can cause it too, btw try delo this time, cheap and my engine noise got much less, previously I was using havoline.

    Btw try to do tappets yourself, saves money and you use the recommended settings

    Btw, 3 years sound long enough, retest compression
    Deisel engine oils have very strong detergents don't you think they might dissolve carbon buildup which must be there and increase blow by

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    Quote Originally Posted by daniyalahmad View Post
    Hmmm...
    What about Delo? Safdar is suggesting Delo. Since its quite cold over here so 20W - 50 will be good or there are chances that it might make the engine feel a bit sluggish?
    As you said , you have tstat valve installed and fan is also on auto so no issue... Engine achieving its optimum operating temp... Cold or no cold

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    Quote Originally Posted by smijaz View Post
    Deisel engine oils have very strong detergents don't you think they might dissolve carbon buildup which must be there and increase blow by
    Imo it won't make any difference in terms of blowby, but it sure will clean the engine up and protect the rockers better.

    My friend once experienced a car that would disell abit even after ignition cut because of carbon buildup. So I think better detergency can only help

    I was suggesting 15w40.
    haters gonna hate, potatoes gonna potate

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    Running delo in one margalla, friends using mobil delvac in a margalla and a mehran.

    So far I have less engine noise.

    My Engine was already burning oil so it will probably burn this too, previously I was on 20w50 havoline

    Delo is a multigrade oil, suitable for both gasoline and diesel engine
    haters gonna hate, potatoes gonna potate

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    What if i continue to use SM grade oil in my khyber for the next 3500 kms?

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    Quote Originally Posted by margallar View Post
    Imo it won't make any difference in terms of blowby, but it sure will clean the engine up and protect the rockers better.

    My friend once experienced a car that would disell abit even after ignition cut because of carbon buildup. So I think better detergency can only help

    I was suggesting 15w40.
    That carbon buildup causing dieseling is inside the combustion chamber. It acts as glowing hot spot which ignites the sucked in fuel vapors even without spark like in diesel engines. That's y called dieseling. Engine oil detergents will not clean that.
    I was talking about the carbon between piston, rings and sleeve.

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    No i don't think it will cause any issue there. Though I wish It will be better if @Xulfiqar bhai comments here
    haters gonna hate, potatoes gonna potate

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    Quote Originally Posted by DUDE007 View Post
    What if i continue to use SM grade oil in my khyber for the next 3500 kms?
    Log 5w20 pe 25k chala letay hain, 3.5k kya hota hai. Just use api sg next time

    You are using the right viscosity anyways

    You can't just throw away the oil.
    haters gonna hate, potatoes gonna potate

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    Quote Originally Posted by DUDE007 View Post
    Take off the lower hose and open the radiator cap. The plugs/bolts may be jammed due to corrosion or because they havent been removed before. Best way is to take off the hose and change the clamp if necessary.
    So funny of me Actually what I was looking at was not drain plug but something else I could not see drain plug becoz it was covered in dust. After cleaning I am able to reach drain plug Thanks. And its not jammed, its fine. Thanks bro

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    Quote Originally Posted by margallar View Post
    Running delo in one margalla, friends using mobil delvac in a margalla and a mehran.

    So far I have less engine noise.

    My Engine was already burning oil so it will probably burn this too, previously I was on 20w50 havoline

    Delo is a multigrade oil, suitable for both gasoline and diesel engine
    I am not saying it can't be used or is not used by people or not applicable to petrol engines.
    I will happily use delo in my car any day but NOT if my car starts to give out smoke and decrease oil level. In this case it is contraindicated.

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    nothing will happen to your car

    if you want to use 15w-40, delo gold is one of the best you can get for your car
    https://www.facebook.com/OsamaAbbasPhotography

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