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Thread: Bloody oil leak!!!!

  1. #1
    disco95 Guest

    Bloody oil leak!!!!

    After rebuilding the TC in Rosemary last year she developed a pretty bad oil leak, oil run is probably more the term :roll:
    I couldn't work out why, as I'd done everything right. :x
    I finally bit the bullet and pulled the box back out for a gander, none of the gasket crap I'd put in was left. It had pretty much all disolved 8O
    This time I pumped the RTV silicon into the joints thinking "there's no way this is ever going to leak again" 8)
    How wrong was I. I'd only got it all together last night, and took her out this morning for the weekly shop and a visit to the vet for little Stockoodie.
    Got home this afternoon and lo- and behold :!: Oil spots under the goddamned vehicle in the vicinity of the TC.
    Is there any stop leak stuff you can put in these damn things to stop this?
    It never leaked a drop befor ethe rebuild, but those who are familiar with the vehicle will know that I needed a new housing, perhaps the machining isn't as good on this one as the original. I would have thought the silicon crap would've made up for it though. :roll:

  2. #2
    Join Date
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    I figure you are talkng about the LT230....

    where is it leaking from?? the bottom cover? I had this problem on my 93 Rangie after i rebuilt the t/case due to a bad bearing... I used some RTV but i let it dry for 1/2 hour or so then put the cover on.... hasnt leaked a drop since... and it has oil in it!!

    HTH

    Mick

  3. #3
    Join Date
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    On any joints that have a tendency to look like problem ones, I use "Stag" It will with stand steam pressure so rekon it will do all right on most things. It is just not very flexable as it sets hard, so it is not good for everywhere.

  4. #4
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    Be very careful refitting the transfer case, it is easy to snag the input shaft seal on the gearbox output shaft, creating an instant leak in a brand new seal.

  5. #5
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    I don't like using silicone sealer as a gasket sealer some types are not very oil or heat resistant loctite have a good sealer 510 or 515 and I have seen one motor stuffed when someone used to much on a sump gasket the excess went and blocked alot of the oil galleries.

    this was on a trench digger,the motor is flat out all day needed a new crank and camshaft plus rockershaft and followers the proper gasket sealers stay in a liquid form when in contact with air and dissolves in the oil.
    disco seriesII mods so far:-bullbar,hyd winch,
    detriot locker,lsd front,C.D.L kit,chipped and bigger intercooler,2" lift,rock sliders, lsd in transfer case, modified auto trans.

    In the event of nuclear war,Disregard this message

  6. #6
    disco95 Guest
    I think maybe it's leaking from both ends of the intermediate shaft. I've heard that the O rings can leak and there's not much that can be done about it. They were new last year when I did the whole TC. I just can't see the gaskets leaking, I really made sure I did a good job of it this time.
    The RTV silicon is pressure, heat and oil resistant. It doesn't set solid either, but stays rubbery.
    I'm at a losss as to what to do with it now. Buggered if I'm going to pull it out again, it's no where near as bad as it was.
    Oh well, another spot to match my steering box leak

  7. #7
    Join Date
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    mine is leaking at the intermediate shaft,the O rings may not have sufficent crush other O rings on the car I have done suffered from this but using after market ones seem to solve this.
    disco seriesII mods so far:-bullbar,hyd winch,
    detriot locker,lsd front,C.D.L kit,chipped and bigger intercooler,2" lift,rock sliders, lsd in transfer case, modified auto trans.

    In the event of nuclear war,Disregard this message

  8. #8
    tombraider Guest
    Originally posted by stevo
    I don't like using silicone sealer as a gasket sealer some types are not very oil or heat resistant loctite have a good sealer 510 or 515
    Steve is spot on on this one... RTV doesnt like oil... in fact it rather hates the stuff!!!!

    You need the loctite gasket sealer, Silicone is for sealing against moisture.
    Personally I have never used silicone on a vehicle component and would advise against it completely.

    Out comes the TC again!!!! Sorry

    Cheers
    Mike

  9. #9
    tombraider Guest
    Originally posted by disco95
    The RTV silicon is pressure, heat and oil resistant. It doesn't set solid either, but stays rubbery.
    Oil resistant means if oil drops on it, it wont react violently.

    You want "Oil compatible" and even then "Oils aint oils, Sol"

    It only takes a single additive (by manufacturer) to change oils compatibility with sealing compounds and rubbers.

    Cheers
    Mike

  10. #10
    Join Date
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    I have used the blue RTV as my sump gasket and also on my T/case and gearbox and there are no leaks!

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