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Total long shot...

This is a discussion on Total long shot... within the Internal Engine forums, part of the LSx Technical Help Section category; But I have a fairly decent sized water leak coming from the top drivers side rear of the engine. I've ...

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    LSwut tep98ws6's Avatar
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    Total long shot...

    But I have a fairly decent sized water leak coming from the top drivers side rear of the engine. I've ruled out head gasket but is it possible that I don't have my head bolts sealed right? I put a good amount of moly on the bottom of the threads and under the head of the bolt but my dad mentioned on some engines, he's had to put thread sealant on to prevent water working it's way up the bolts. I didn't pay close attention as to if the head bolts go into any water jackets... The engine runs strong and good just this water leak has me weary. Had anyone else had this issue?

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    Slow'er'Ass Mr. Luos's Avatar
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    First things first...

    Drivers side is left. When you say right rear, is the leak near #8 or #7?
    What head bolts did you use?

    And also, you mention ruling out head gasket. How are you able to do so?

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    Veteran 0rion's Avatar
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    check your coolant pipes or plugs back there. Pipes if you still have the stock intake...plugs if you switched to the LS6 set up. How much coolant are we talking here?

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    Veteran 0rion's Avatar
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    the head bolts don't pass through any water jackets...they're blind holes.

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    We took the head off to check the gasket and retorqued down to spec hence why it's ruled out. The leak is inbetween #5/#7 but it's coming from the top? I used ARP headbolts and I have the stock LS6 intake. Were talking a pretty steady leak ... It's enough that I havnt moved my car since I installed the new pushrods

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    Veteran 0rion's Avatar
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    what do you mean it's coming from the top? Also, you have an LS1 intake stock so it has the crossover pipes that run under the intake. Check that back port where the coolant pipe goes into the top of the head and make sure it's not leaking there and running down somewhere else.

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    You reused a head gasket? Bad idea right there.

    As for the leak, did you take the drain plug out when you dropped the motor to get all of the coolant out? And if you did, did you put thread locker on the plug when you reinstalled it?

    Another thought...are all of your coolant hoses on tight? Could it be coming from the heater hoses? Check by the firewall.

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    LSwut tep98ws6's Avatar
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    No reused head gaskets. I'd have to be a pretty huge idiot to reuse head gaskets (which I'm not)

    the coolant is coming from the head. Not from where the head meets the block. I'm hoping it's just a coolant hose. But fuck. It's weird. I just needed confirmation on the headbolts.

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    Slow'er'Ass Mr. Luos's Avatar
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    Sounds like it may be a plug that goes into the crossover line in the back.
    Here...



    Some head gaskets can be re-used, although the stockers shouldn't be. I try not to if possible.
    Glad to hear you went with ARP bolts. The stock ones can only be torqued down once.

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    so it's puddling on top where the intake meets the head? Definitely sounds like one of those cross over tubes leaking. They have little rubber o-ring type gaskets on them.

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    LSwut tep98ws6's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    Sounds like it may be a plug that goes into the crossover line in the back.
    Here...
    Click for full size


    Some head gaskets can be re-used, although the stockers shouldn't be. I try not to if possible.
    Glad to hear you went with ARP bolts. The stock ones can only be torqued down once.
    Thanks for the pic, that will help tons when I get back around to it when it's done snowing tomorrow. I'm probs gonna see if I can't just redo all the plumbing up on the engine. Love my $$ pit

    The stock TTY ones suck. I def wanted some worth the $$ and the build

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    Veteran 0rion's Avatar
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    doesn't have to be a money pit....those little rubber gaskets are cheap. I replaced mine when I did my ls6 intake several years ago.

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    Quote Originally Posted by tep98ws6 View Post
    Thanks for the pic, that will help tons when I get back around to it when it's done snowing tomorrow. I'm probs gonna see if I can't just redo all the plumbing up on the engine. Love my $$ pit

    The stock TTY ones suck. I def wanted some worth the $$ and the build
    Let me know if you need any other pictures. I took a decent amount when I had the motor out.


    I really doubt it has anything to do with the head bolts though.
    And 0rion and I both understand the money pit comment....

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    I'll check everything out when the weather is good and see what I can find. Hopefully it's just a kinked or broken line or pipe.

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    Quote Originally Posted by Mr. Luos View Post
    Let me know if you need any other pictures. I took a decent amount when I had the motor out.


    I really doubt it has anything to do with the head bolts though.
    And 0rion and I both understand the money pit comment....
    Cool, thanks a ton.
    I really doubted the headbolts too, hence the long shot title.
    And money pit is sad bc I just started mine I can't even imagine the amount you both have spent. I know in just what i've done in the past month, I spent $3500+

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    Quote Originally Posted by Mr. Luos View Post
    Let me know if you need any other pictures. I took a decent amount when I had the motor out.


    I really doubt it has anything to do with the head bolts though.
    And 0rion and I both understand the money pit comment....
    I haven't even had to put gas in mine in 2 months. My tranny is the next big ticket item that's gonna cost me out the wazoo. Everything else is done on the car except the tranny. I'm trying to hold off spending the money on it but it's coming.

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    Quote Originally Posted by tep98ws6 View Post
    Cool, thanks a ton.
    I really doubted the headbolts too, hence the long shot title.
    And money pit is sad bc I just started mine I can't even imagine the amount you both have spent. I know in just what i've done in the past month, I spent $3500+
    That is just my shortblock...


    Is the leak flowing pretty good? Enough to leave a puddle under the car?


    Quote Originally Posted by 0rion View Post
    I haven't even had to put gas in mine in 2 months. My tranny is the next big ticket item that's gonna cost me out the wazoo. Everything else is done on the car except the tranny. I'm trying to hold off spending the money on it but it's coming.
    Same here.
    Not looking forward to that tab...

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    LSwut tep98ws6's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    That is just my shortblock...


    Is the leak flowing pretty good? Enough to leave a puddle under the car?
    Just a small puddle underneath

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by tep98ws6 View Post
    Just a small puddle underneath
    Okay.
    I would check that little cap on the crossover lines. O-ring could have gotten pinched or something.
    At least that is where I would start.

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    LSwut tep98ws6's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    Okay.
    I would check that little cap on the crossover lines. O-ring could have gotten pinched or something.
    At least that is where I would start.
    Good call.

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