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Thread: Oil pump driveshaft failure

  1. #1
    Supramania Regular
    kotu100's Avatar
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    Default Oil pump driveshaft failure

    I swear this car is cursed, or just flat out hates my guts.

    I'm on the verge of solving my electrical gremlins and this shit happens.
    Not really sure what to do about this, engine is fresh built with maybe 5k miles on it.

    Full rebuild with all new bearings at the bare minimum i suspect.






  2. #2
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    Default Re: Oil pump driveshaft failure

    Is it just the seal that's leaking? What am I looking at here?

  3. #3
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    Default Re: Oil pump driveshaft failure

    Notice how the timing belt is hanging off the pulley by about 1/2"?
    The driveshaft retainer plate has worn through causing the shaft to have 1/2" of play in and out the block.

    Heres a crappy video showing the play in the shaft.

  4. #4
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    Default Re: Oil pump driveshaft failure

    interesting that this seems to always pop up shortly after a rebuild....

    anyway, throw one of these on your shopping list
    http://technicoracing.com/cs/index.p...product_id=293

  5. #5
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    Default Re: Oil pump driveshaft failure

    Quote Originally Posted by andrew_mx83 View Post
    interesting that this seems to always pop up shortly after a rebuild....

    anyway, throw one of these on your shopping list
    http://technicoracing.com/cs/index.p...product_id=293
    I've noticed that as well Andrew, I purchased this engine fully built assembled and have never opened the bottom so not sure whats going on down there just yet.

    Thanks for the link as well, that looks like a great option over stock.

  6. #6
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    Default Re: Oil pump driveshaft failure

    Beech also sells a modified shaft retainer plate for $130 or can modify yours for $60. Although, the needle bearing setup Andrew suggested seems pretty nice for the same price new as the one from Beech. The Beech one just has some grooves machined in it for oiling. Still has to be an upgrade over stock.
    1992 Supra w/Sunroof 7M-GTE Auto
    CT26 60-1, Denso 550s, Lexus AFM, Aeromotive AFPR, Apexi Power Intake, 3" Downpipe, 3" Custom Exhaust, High Flow Elbow, HKS SSQV, AEM Wideband, AEM TruBoost, Apexi SAFC-II, Tein Street Advance Coilovers, Sparco NSII 18x8.5+45/18x9.5+40

  7. #7
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    Default Re: Oil pump driveshaft failure

    Ordered the retaining plate from Technico last night.

    Today i pulled a driveshaft from another motor that was laying around, turns out this one has some damage on it as well. One of the other 7m's i have laying around doesnt show any play in the shaft so i'm very curious as to what is causing these failures.

    Should i be looking into replacing all the driveshaft bearings and oil pump bushings? The oil pump as well? Main and rod bearings?

  8. #8
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    Default Re: Oil pump driveshaft failure

    Wow there seems to be more cases of this appearing. I wonder if using the incorrect torque on the drive plate has anything to do with it? The last 2 motors I rebuilt hasn't shown any signs of failure yet.

  9. #9
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    Default Re: Oil pump driveshaft failure

    Ohhhhhh my god why do I wander onto threads like this and freak myself out!?!? Thank god it hasn't happened to me yet - maybe I will hop on this sooner rather than later. :/

    My build thread....
    IG: @pistonsandpixiedust

    Quote Originally Posted by jdmfreak View Post
    Supra reasonable??

  10. #10
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    Default Re: Oil pump driveshaft failure

    Have a demel ?
    Grind your own oil slots.

    Had one do that to me once, seen a post on here, or supraforums where someone ground directional slots so that the shaft rotation would pull oil from the rear, around to the front.
    No problems since.

    But the technico thing is cool.

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