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Thread: starnge noise in honda civic 2000 exi M/T

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    Default starnge noise in honda civic 2000 exi M/T

    salam to all pw's
    well the problem started recently that my car is giving a strange rattle type noise on idle which is less pronounced on petrol and more pronounced on CNG. moreover, if ac is switched on on petrol then the noise remains same as before but if turned on on CNG the noise goes way much higher. opened the hood to check the source and i can clearly make out that it is coming from the portion under engine at a place parallel to ac compressor near the place where 4 dirty looking pipes are going towards exhaust and having a cover on top of them. car is 81k driven original mileage. moreover, if clutch pedal is pressed the noise gets a bit week but dont vanish completely. also , AC clutch rapidly disengage/ engage once on cng though ac is chilling. recent work done on car were:

    1. AC service with evap clean and gas refill
    2. planning to check transmission oil in coming week coz i never changed it

    experts plz advice what type of repair should i be going for @Xulfiqar
    thnx and looking forward for a good advice

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    Could it be at belt idler pulley bearing is gone? Engine foundation? Can't say much from what you describe. Better to have it looked at by a competent mechanic.

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    Quote Originally Posted by msabbasi View Post
    Could it be at belt idler pulley bearing is gone? Engine foundation? Can't say much from what you describe. Better to have it looked at by a competent mechanic.
    u mean belt idler pulley of what?? ac compressor related?

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    Quote Originally Posted by hornblower View Post
    u mean belt idler pulley of what?? ac compressor related?
    Yes but that noise is constant all the time, however, I am thinking that maybe as the a/c compressor cut in and out there is a difference in load on the bearing. But as I said, it is hard to understand the noise from what is written in your post.

    Changing t/x oil is good but it will have no impact on the noise.

    If is is more noticeable at idle then there is something vibrating and it could be two metal things banging against each other. Sitting here it is hard to say what the noise is. Get it checked.

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    Quote Originally Posted by hornblower View Post
    salam to all pw's
    well the problem started recently that my car is giving a strange rattle type noise on idle which is less pronounced on petrol and more pronounced on CNG. moreover, if ac is switched on on petrol then the noise remains same as before but if turned on on CNG the noise goes way much higher. opened the hood to check the source and i can clearly make out that it is coming from the portion under engine at a place parallel to ac compressor near the place where 4 dirty looking pipes are going towards exhaust and having a cover on top of them. car is 81k driven original mileage. moreover, if clutch pedal is pressed the noise gets a bit week but dont vanish completely. also , AC clutch rapidly disengage/ engage once on cng though ac is chilling. recent work done on car were:

    1. AC service with evap clean and gas refill
    2. planning to check transmission oil in coming week coz i never changed it

    experts plz advice what type of repair should i be going for @Xulfiqar
    thnx and looking forward for a good advice
    Brother listen closely from where the sound is coming. Is it the power steering motor ?

    Other chances are that its the pulley, tensioner, thrust bearing, crankshaft bearing etc.

    They all eventually wear out within 40k to 60k miles.
    All life is an experiment. The more experiments you make the better.

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    the noise might also come from the pulleys if they are lose! get a good mechanic

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    Thnx all. Plz suggest a good mechanic in khi any where

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    It must be the cover of exhaust manifold have u checked it?

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    Yes that might be ..... My fault bro , i overlooked common sense ..... Will check that also and get back on the forum . thnx all for ur valuable advices. Plz suggest a good mechanic in khi near zamzamza or muhammad ali society.

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    well here is the update .... check manifold cover , it was not loose ..... took car to a recommended mechanic and he checked the car and in just few moments diagnosed it is sound of timing belt and needs to be replaced asap. will IA do it on weekened. plz advice which all other things need to be changed alongwith timing belt coz it is first time its timing belt is going to be changed. it is running on stock belt coz as per manual it is to be changed at 95k.

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    Great that the problem was diagnosed soon.

    There is a belt tensioner device to keep the timing belt tight over the pulleys. Usually, the wear components of the belt tensioner device are replaced along with the belt. When changing the belt, ensure that all OEM parts are used REGARDLESS of cost. I have a 2007 Civic so I am not familier with the 2000 Civic, most probably one of the engine mounts may have to be removed in order to gain access to the timing cover, if that is the case it is good to have the mount inspected for cracks. If cracked, replace.

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    Quote Originally Posted by msabbasi View Post
    Great that the problem was diagnosed soon.

    There is a belt tensioner device to keep the timing belt tight over the pulleys. Usually, the wear components of the belt tensioner device are replaced along with the belt. When changing the belt, ensure that all OEM parts are used REGARDLESS of cost. I have a 2007 Civic so I am not familier with the 2000 Civic, most probably one of the engine mounts may have to be removed in order to gain access to the timing cover, if that is the case it is good to have the mount inspected for cracks. If cracked, replace.
    my compliments bro for ur advice .... will surely stick to ur advice .... thnx a lot

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    any idea why my car exhaust is sputtering like this. plz check the attached video


    <iframe src="//player.vimeo.com/video/102558452" width="500" height="889" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe> <p><a href="http://vimeo.com/102558452">VID 20140804 191303</a> from <a href="http://vimeo.com/user30833512">Javed Bn</a> on <a href="https://vimeo.com">Vimeo</a>.</p>

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    Quote Originally Posted by hornblower View Post
    any idea why my car exhaust is sputtering like this. plz check the attached video
    Sounds OK to me. Nice even beat. No Sputtering.

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    Sir dont u think it should be a uniform smooth flow ..... I mean why this flow is having jerky flow like "phuk phuk " @msabbasi

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    The exhaust sound is perfectly fine
    you easily notice when the exhaust sputters
    there is no missing or fluctuation of rpm at idle right?

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    Quote Originally Posted by hornblower View Post
    Sir dont u think it should be a uniform smooth flow ..... I mean why this flow is having jerky flow like "phuk phuk " @msabbasi
    its a four cylinder, its supposed to do a lil "phuk phuk" at proper idle rpm by design.
    Bella, You give me everything just by REVing - NEONLIGHT SAGA: NEWTUBE

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    Quote Originally Posted by hornblower View Post
    Sir dont u think it should be a uniform smooth flow ..... I mean why this flow is having jerky flow like "phuk phuk " @msabbasi
    Not at all, this is a four cylinder engine. Compare the sound to another car same as yours and decide.

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    Quote Originally Posted by AsFand26 View Post
    The exhaust sound is perfectly fine
    you easily notice when the exhaust sputters
    there is no missing or fluctuation of rpm at idle right?
    thnx for ur reply bro .... yes rpm is stable at around 700 and goes to 1000 at a/c . no fluctuation

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    Quote Originally Posted by usman_arooq2 View Post
    its a four cylinder, its supposed to do a lil "phuk phuk" at proper idle rpm by design.
    thnx bro

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