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Thread: new ct26 with shaft play

  1. #1
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    Default new ct26 with shaft play

    ok so i bought a rebuilt and balanced ct26 (turbo was never ran on car after rebuild until i installed)
    it has a 46trim wheel and 12 degree exhaust
    the person i bought it from seems to be pretty reputable with turbos(he did work himself)
    before installed i checked shaft play(very little up/down and no in/out play)
    after install i changed oil and filter before 1st start up on turbo
    removed efi fuse
    cranked engine over a few times til oil pressure was seen(around 30psi with autometer)
    all was good
    fired it up and ran awesome
    boost was set to 15
    put 200 miles on it(highway) til i decided to hit boost
    i have hit full 15psi a total of 6 times now
    reset boost back down to 8psi
    noticed my oil return gasket was leaking at the block so i removed turbo and replaced gasket
    while turbo was off i checked shaft play and found that i have some in and out play
    turbo isnt binding/catching and still builds boost fast and holds til redline
    doesnt smoke or burn oil

    my question is:
    how much in/out play is acceptable or if any at all?
    what would cause in/out from such a new turbo?

    also car has always idled a few minutes before and after driving

    mods:
    stock elbow
    3in down pipe
    3in exhaust(no cat or resonators)
    fmic with 2.5" piping
    cone filter(new)


    QUESTION: When does the 7mgte require a MHG?

    ANSWER: When being assembled in the Toyota plant!!!

  2. #2
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    Default Re: new ct26 with shaft play

    Until I have more time to write a response, please stop running the turbo. It will only get worse.
    "Performance is nothing without elegance and elegance is nothing without precision."


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    Default Re: new ct26 with shaft play

    It won't be drivin


    QUESTION: When does the 7mgte require a MHG?

    ANSWER: When being assembled in the Toyota plant!!!

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    Default Re: new ct26 with shaft play

    What kind of sealant did you use? Gasket?
    "Performance is nothing without elegance and elegance is nothing without precision."


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    Default Re: new ct26 with shaft play

    well i bought a new turbo gasket kit off the internet before installing turbo
    came with everything except return tube gasket for the block and banjo bolt crush washers

    so i installed turbo on a sunday and had to work on monday(it is my dd)
    so i had to impravise and used black rtv(not a whole lot and no sealant was to close to the oil return hole)
    took it for a test drive...went smooth
    after 200 miles i noticed a very small dot of oil(thats right a 7m with 1 oil leak lol)
    inspected and found the oil return at the block was leaking a very small amount

    parked it til my gasket came in from toyota
    then i installed the gasket with no sealant and there is no leaks

    i rechecked shaft play today(but i havent driven the car since i posted last night)
    in/out is very minimal
    if i pull up on the compressor wheel just a little bit then there is no play

    turbo is going back to builder so he can check it out
    just wondering if there is anything on my car that could of caused it to go out so soon?

    also i have a hks ssqv bov
    Last edited by jonahs_supra; August 16th, 2011 at 06:48 PM.


    QUESTION: When does the 7mgte require a MHG?

    ANSWER: When being assembled in the Toyota plant!!!

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    Default Re: new ct26 with shaft play

    Winner winner chicken dinner. Bet you a whopper combo there's rtv silicone stuck in the thrust bearing oil feed holes.
    "Performance is nothing without elegance and elegance is nothing without precision."


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    Default Re: new ct26 with shaft play

    You think so?
    I only used rtv for the return that goes to side of block
    No silicone was used on the turbo feed/drain gasket at the turbo

    When I removed the new turbo to replace gasket there was a good distance between silicone and the actually tube for the drain

    Thanks for the help so far
    Will be sending it out this weekend to the builder


    QUESTION: When does the 7mgte require a MHG?

    ANSWER: When being assembled in the Toyota plant!!!

  8. #8
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    Default Re: new ct26 with shaft play

    I had this happen to me recently, the turbo feed gasket was leaking right into the drain on the turbo causing the turbo to be starved of oil. I hate the design of the oiling on the CT series turbos. I would only use OEM toyota gaskets so you get a good seal and use locking nuts (not nylock they will melt)

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    Default Re: new ct26 with shaft play

    Quote Originally Posted by jonahs_supra View Post
    You think so?
    I only used rtv for the return that goes to side of block
    No silicone was used on the turbo feed/drain gasket at the turbo

    When I removed the new turbo to replace gasket there was a good distance between silicone and the actually tube for the drain

    Thanks for the help so far
    Will be sending it out this weekend to the builder
    I misread: I thought you had used rtv on the feed side.

    Quote Originally Posted by Devin LeBlanc View Post
    I had this happen to me recently, the turbo feed gasket was leaking right into the drain on the turbo causing the turbo to be starved of oil. I hate the design of the oiling on the CT series turbos. I would only use OEM toyota gaskets so you get a good seal and use locking nuts (not nylock they will melt)
    There is a reason Toyota uses a crushable steel coated gasket.
    "Performance is nothing without elegance and elegance is nothing without precision."


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  10. #10
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    Default Re: new ct26 with shaft play

    I'm thinking the thrust washer had a defect or something
    Hopefully know something next week


    QUESTION: When does the 7mgte require a MHG?

    ANSWER: When being assembled in the Toyota plant!!!

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