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Oil sending unit is leaking

This is a discussion on Oil sending unit is leaking within the External Engine forums, part of the LSx Technical Help Section category; ok so my oil sending unit is a black cylinder about 3 in long, screws right into the front of ...

  1. #1
    James Bond Spikito's Avatar
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    Oil sending unit is leaking

    ok so my oil sending unit is a black cylinder about 3 in long, screws right into the front of my block. on the back of it there's an electrical plug. Well its leaking around that plug. inside the socket. i cleaned the oil off, and when i unplugged it, oil dumped out.

    Its not leaking around the threads but up top, at the plug. and I'm 100% on that, very obvious, its almost a steady stream. Ive got an oil sending unit ordered. anything i need to know before i swap it out?

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    Smiles for 9.5 Years cammed goat's Avatar
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    Not really. The replacement should come with teflon sealant on the threads. Just BE CAREFUL when putting the new one in. You don't wanna break the new sender while installing it.

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    Not sure of the exact style of yours -- but you may need a special socket. Removing the old one isn't the problem, just don't bugger the new one up with the wrong tool.

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    James Bond Spikito's Avatar
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    2001 3.8 Black - sold
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    yeah it looks like im gonna need a funny socket, i might be able to do with an adjustable wrench...its kind of tight though.heres a pic i found...this has a blue filter, and the unit is the black thing right above it


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    79 T/A -91 Firebird
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    You have to have a special socket. Get it at the zone

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    King 0f n00bz shady milkman's Avatar
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    Quote Originally Posted by JoshieDoom View Post
    You have to have a special socket. Get it at the zone
    noooooooooo..their shit doesnt fit ..if you have a advanced auto around you..go and get theirs..the zone's socket..is like this all in one socket...and there isnt enough clearance to get the socket all the way on it

  7. #7
    Member NoscamaroSS's Avatar
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    I just replaced the one on the GF's car a couple weeks ago and all I used was a simple cresent wrench to get the job done.
    02 Camaro
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    James Bond Spikito's Avatar
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    yeah, they didnt have anything at Pep Boys, and the only other palce i know of around me is an oreillys.

    i have a crescent wrench and thats prob gonna be my best bet.

  9. #9
    James Bond Spikito's Avatar
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    2001 3.8 Black - sold
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    Ok well the crescent wrench sucks...the platic part of the OSU fell off first time i touched it, so its just the brass piece...its mostly round, but has like 8 flat spots. but they arent big enough for the wrench to get ahold of...so now im fucked till i can borrow better tools

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    Member c5z28's Avatar
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    get the opsu socket to make it a quick job, that white tape stuff for pipe threads will ensure it doesn't leak when you put it in.

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    Quote Originally Posted by shady milkman View Post
    noooooooooo..their shit doesnt fit ..if you have a advanced auto around you..go and get theirs..the zone's socket..is like this all in one socket...and there isnt enough clearance to get the socket all the way on it
    Ive used that socket many many times on GM vehicles, but not on my bird.

    Oreillys does have Goodwrench sockets..

  12. #12
    James Bond Spikito's Avatar
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    ok cool, may look into that that

    it looks like it has thread lock on it already, im not gonna worry about teflon unless it starts leaking.

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    79 T/A -91 Firebird
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    Quote Originally Posted by Spikito View Post
    ok cool, may look into that that

    it looks like it has thread lock on it already, im not gonna worry about teflon unless it starts leaking.
    Clean out the whole. Teflon is highly recommended. its cheap as piss and I will mail you a strip if you need it.. lol

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    Just me Y2KPewterSS's Avatar
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    Quote Originally Posted by JoshieDoom View Post
    Ive used that socket many many times on GM vehicles, but not on my bird.

    Oreillys does have Goodwrench sockets..

    Most of my sockets and gear wrenches are Goodwrench, good stuff.

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    79 T/A -91 Firebird
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    Quote Originally Posted by Y2KPewterSS View Post
    Most of my sockets and gear wrenches are Goodwrench, good stuff.
    I was dissapointed though at their t50 torx. It has the nose that smooths out then the threads. It almost rounded off the bolt when I was taking off my hatch struts. I had to smooth the torx down with a grinder.

  16. #16
    James Bond Spikito's Avatar
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    I managed to get it done pretty easy with a pair of channel locks.

    My car also runs better now, nothing special, but its noticeable. does the OSU communicate with the computer i any way.

    the only thing i've really noticed is that after my intake gaskets got replaced a few months ago, my car kinda surged between 1500 and 2k RPMs. like, if im cruising along at 1500, then try to accelerate, but not hard enough to downshift. it just felt like the tranny was bein bitchy and didnt wanna drop back to third. did think much of it.

    anyway, as soon as i swapped this thing out, that stopped.

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