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Thread: has anyone taken injectors apart on this forum?

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    General 319cssb's Avatar
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    Default has anyone taken injectors apart on this forum?

    Before getting the 30mm socket out, I wanted to see if there is some info on what the internals look like.
    I will either find a way, or make one!
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    4 Star General Barrman's Avatar
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    I took mine apart 8 years ago to try and refresh them. A pop tester is really needed after you take them apart to verify they are good. Buying new Bosch injectors is almost cheaper and easier in the long run.
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    General 319cssb's Avatar
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    I have one that leaks from the center section I think there is a copper gasket that seals the half But I am not sure.

    I am 100% sure:
    -the return lines are not leaking
    -the fitting is not leaking
    -the injector is not leaking from the bottom seal.
    I had to write that, because someone will always inject a post with 'did you check the rubber return hoses'?
    I will either find a way, or make one!
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    I hate people, who use big words just to make themselves look perspicacious.

    1988 M813
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    Sergeant Major Mg84648's Avatar
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    Quote Originally Posted by 319cssb View Post
    I have one that leaks from the center section I think there is a copper gasket that seals the half But I am not sure.

    I am 100% sure:
    -the return lines are not leaking
    -the fitting is not leaking
    -the injector is not leaking from the bottom seal.
    I had to write that, because someone will always inject a post with 'did you check the rubber return hoses'?
    Did you check the rubber return hoses?

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    Super Moderator gringeltaube's Avatar
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    Quote Originally Posted by 319cssb View Post
    Before getting the 30mm socket out, I wanted to see if there is some info on what the internals look like.
    Here you go...

    GM 6.2L- 6.5L fuel injector.jpg

    The only one copper washer is used to seal the "nozzle nut" against the cyl head.
    Last edited by gringeltaube; 01-06-2019 at 12:28.

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    General 319cssb's Avatar
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    What do these injectors leak from when they do that from the center area? I thought Id see a copper washer . But there seems to be a color ring. Is that some itentifier only or dors it serve a purpose like to seal the halfs?
    I will either find a way, or make one!
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    I hate people, who use big words just to make themselves look perspicacious.

    1988 M813
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    4 Star General Keith_J's Avatar
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    The fit of the top and bottom halfs (very hard steel) and the softer intermediate plate form the seal. The body seal is low pressure, fuel return. The intermediate plate seals the high pressure injection pressure (7000 PSI).

    If the return lines are blocked, the body seal will see much higher pressure. When the injector "fires", the movement of the needle displaces fuel in the body, forcing it back to the tank. The actual weeping past the needle is tiny, just a few drops a minute.
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    General 319cssb's Avatar
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    So if i get the injector out and put it in my $1100 sweeping frequency ultrasonic cleaner to clean the injector. Might that knock the blockage off ?
    I will either find a way, or make one!
    --------------------------------------------------------------------------------------------------------
    I hate people, who use big words just to make themselves look perspicacious.

    1988 M813
    1987 M1028A2
    1084 M1009
    1997 M1078

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    General 319cssb's Avatar
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    Well cleaning them in the ultrasonic cleaner worked like a charm. The injector looks like new. Ill order some gaskets and do the rest of them, too
    I will either find a way, or make one!
    --------------------------------------------------------------------------------------------------------
    I hate people, who use big words just to make themselves look perspicacious.

    1988 M813
    1987 M1028A2
    1084 M1009
    1997 M1078

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    General 319cssb's Avatar
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    And I'll replace the return line tubing. I like the Idea of having them see through. I think everyone is raving about Tygon tubing. Is there a certain diameter size everyone uses?
    Edit: I will get Viton tubing 5/16" 5 or 10ft of it
    Last edited by 319cssb; 01-07-2019 at 18:46.
    I will either find a way, or make one!
    --------------------------------------------------------------------------------------------------------
    I hate people, who use big words just to make themselves look perspicacious.

    1988 M813
    1987 M1028A2
    1084 M1009
    1997 M1078

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