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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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    kindly reply experts : https://www.pakwheels.com/forums/sho...d.php?t=232298

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    @margallar I think this is the pipe you're referring to. Correct me if i'm wrong....
    Self Tunning  Khyber G10 Plugs valve clearance spark gap etc -1455213

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    Guys i cleaned the carb today and noticed that whenever i sprayed the cleaner, the rmp would drop; is it normal? Besides this i have noticed improvements in acceleration and the car doesn't shake when i put it in 2nd gear. I'm hoping to see some improvements in consumption too as it was 9.3kmpl before.
    I think i should clean the plugs too as all the sludge went in the engine.

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    yes you got the right pipe.

    is there another pipe going to the air filter box, from the carburetor throttle body?
    haters gonna hate, potatoes gonna potate

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    @margallar Nope that was the only pipe.
    Do you any shop on brandreth road where i can buy a multimeter? Any specific brand and price? I think you own one.

    EDIT: Is the pipe also known as pcv valve? should i clean it?

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    Quote Originally Posted by DUDE007 View Post
    What is the oily purple stuff on one side of the carb and the plunger?
    its just fuel residue seeping out from the plunger boot.. its mostly seen in fuel from caltex

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    Quote Originally Posted by axe.effect View Post
    I cleaned PCV valve with carburetor cleaner. Suction test revealed that it is one side valve. In Normal suction, air flows with restriction. But It closes with a little high pressure suction. Is it ok?
    yes... does it also rattle

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    Quote Originally Posted by Xulfiqar View Post
    no.1 are float chamber vents, spray some in there, it will only work very slowly though, then spray some down the throats to dislodge any muck from the throttle plates and choke plate, after you are done make sure the choke plate works smoothly.
    i have a query or a rather a theory.. correct me if am wrong'

    if we spray 1/3 carb cleaner into the float vents it will exert upward pressure on the float and may disturb float setting... so one should let the float chamber empty by cutting of fuel from the cng dash switch and then careful spray cleaner in to vents.

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    Quote Originally Posted by margallar View Post
    i am not familiar with khyber, does a thin rubber pipe go to the air filter box, from carburetor?
    no.. cultus and margalla has the bimetalic valve in the air filter assembly which allows air to bypasses fuel mixture area when the engine temperature gets warm. khyber has this unit attached to carb.. you can see it as rectangular object in the purple residue pic

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    Quote Originally Posted by DUDE007 View Post
    @margallar Nope that was the only pipe.
    Do you any shop on brandreth road where i can buy a multimeter? Any specific brand and price? I think you own one.

    EDIT: Is the pipe also known as pcv valve? should i clean it?
    PCV is the metallic part fixed in the intake manifold. When spraying cleaner you should remove the rubber pipes

    Unit-T multimeters are good and you can get one with temp sensor with in 1000... temp sensor gets handy in checking air conditioners..

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    Quote Originally Posted by DUDE007 View Post
    @margallar Nope that was the only pipe.
    Do you any shop on brandreth road where i can buy a multimeter? Any specific brand and price? I think you own one.

    EDIT: Is the pipe also known as pcv valve? should i clean it?
    Uni T multimeters are good. ut33b or even better ut33c are good enough for beginners.

    I got my first meter from township lahore, it was a shop near al zaban store, I don't recall the name.

    The first one was damaged by my mistake, the next time I didn't want to go anywhere so I asked a lab attendant to arrange it
    haters gonna hate, potatoes gonna potate

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    Quote Originally Posted by DUDE007 View Post
    Guys i cleaned the carb today and noticed that whenever i sprayed the cleaner, the rmp would drop; is it normal? Besides this i have noticed improvements in acceleration and the car doesn't shake when i put it in 2nd gear. I'm hoping to see some improvements in consumption too as it was 9.3kmpl before.
    I think i should clean the plugs too as all the sludge went in the engine.
    Yes its normal.. you have to throttle up while spraying to avoid engine stall

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    Quote Originally Posted by smijaz View Post
    no.. cultus and margalla has the bimetalic valve in the air filter assembly which allows air to bypasses fuel mixture area when the engine temperature gets warm. khyber has this unit attached to carb.. you can see it as rectangular object in the purple residue pic
    I was thinking that the bimetallic strip might be inside the air filter box and the oil might be leaking from there, but now that you told us, that isn't the cause
    haters gonna hate, potatoes gonna potate

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    Quote Originally Posted by DUDE007 View Post
    @margallar Nope that was the only pipe.
    Do you any shop on brandreth road where i can buy a multimeter? Any specific brand and price? I think you own one.

    EDIT: Is the pipe also known as pcv valve? should i clean it?
    Pcv valve is connected somewhere to the pipe going to manifold, didn't get a chance to mess with it yet so can't help you
    haters gonna hate, potatoes gonna potate

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    Quote Originally Posted by smijaz View Post
    yes... does it also rattle
    Before cleaning, it was stuck (no rattles). But it does rattle now. Now car is running much better.

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    Dear experts : any body can.have a look at my pictures? i need help in joining carby vaccum pipes

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    https://www.pakwheels.com/forums/sho...d.php?t=232298

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    @DUDE007

    How much ml is your carby cleaner bottle?

    The 7CT Carby cleaner i have is 550 ml and it does not give clear instructions about quantity.

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    Recently, I also purchased UNI-T33C and found it very useful. T33C has temperature measurement probe upto 250 C.

    http://www.uni-trend.com/HDM_UT33.html

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    Quote Originally Posted by smijaz View Post
    i have a query or a rather a theory.. correct me if am wrong'

    if we spray 1/3 carb cleaner into the float vents it will exert upward pressure on the float and may disturb float setting... so one should let the float chamber empty by cutting of fuel from the cng dash switch and then careful spray cleaner in to vents.
    the push won't really be that strong to disturb the setting but hey. . one can never be too safe

    If I were to go that route I would just empty the float chamber and half-fill it with carb cleaner
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