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Thread: 1990 miata ticking issue

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    Is it new? A crack in the header or somewhere high in the exhaust stream can make a ticking sound. What brand is it? Is it a head tick or knock in the bottom end?

    If it just started it's probably an exhaust issue.

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    Quote Originally Posted by simontibbett View Post
    Is it new? A crack in the header or somewhere high in the exhaust stream can make a ticking sound. What brand is it? Is it a head tick or knock in the bottom end?

    If it just started it's probably an exhaust issue.
    its new, its some ebay brand(i know i know) and its a head tick seems like its the loudest right around the firewall

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    Quote Originally Posted by dohc4.6sc View Post
    its new, its some ebay brand(i know i know) and its a head tick seems like its the loudest right around the firewall
    Check the header for a leak, if there is a tiny crack in the header, especially around the runners, it will sound just like a ticking or even a knocking motor. The crack will worsen and you will swear the motor is about to explode.

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    Quote Originally Posted by simontibbett View Post
    Check the header for a leak, if there is a tiny crack in the header, especially around the runners, it will sound just like a ticking or even a knocking motor. The crack will worsen and you will swear the motor is about to explode.
    i forgot to mention there is no o2 in it right now, couldnt get the old one out but the header came with a plug for the o2 so i installed it for now, could this cause a tick at all?

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    Quote Originally Posted by dohc4.6sc View Post
    i forgot to mention there is no o2 in it right now, couldnt get the old one out but the header came with a plug for the o2 so i installed it for now, could this cause a tick at all?
    Yes, it could. Take the plug out and see what it sounds like.

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    Quote Originally Posted by simontibbett View Post
    Yes, it could. Take the plug out and see what it sounds like.
    what should it look like? i mean its steel and actually screws in so i thought it wouldnt do anything but dump fuel till i got a new one.

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    Quote Originally Posted by dohc4.6sc View Post
    what should it look like? i mean its steel and actually screws in so i thought it wouldnt do anything but dump fuel till i got a new one.
    Well if it's leaking then it could make a ticking/knocking noise.

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