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Thread: Midget Thrust bearing coonversion

Discuss the Austin Healey Sprite and the MG Midget. Two different but similar cars sometimes referred to collectively as the Spridget.

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    Great Pumpkin JPSmit's Avatar
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    Midget Thrust bearing conversion

    In another forum, I have been watching a curious Midget project - the guy is swapping the engine but keeping the transmission (which is the opposite of what I would do) More to the point he has installed a contemporary thrust bearing. Thought it might be worth sharing here.

    Thread is here: https://forum.retro-rides.org/thread...n-cg13-project

    thrust bearing is this:

    MG Midget modern thrust bearing.jpg
    Last edited by JPSmit; 04-20-2019 at 06:47 PM.
    John-Peter Smit
    1976 MG Midget
    1969 Vauxhall Viva GT
    1958 Fiat Multipla (Barn art)

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    Yoda Gliderman8's Avatar
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    Re: Midget Thrust bearing coonversion

    Is that a hydraulic throw out bearing?
    when I did the 5-speed conversion on my TR6 I got rid of the clutch slave cylinder and installed a hydraulic throw out bearing. I like it!
    Elliot
    Central PA
    1976 TR6 White/Biscuit interior SOLD
    1973 TR6 Damson Plum / Biscuit interior, HVDA 5-speed, Good Parts Hubs
    Nostalgia isn't what it used to be.

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    Great Pumpkin JPSmit's Avatar
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    Re: Midget Thrust bearing coonversion

    Quote Originally Posted by Gliderman8 View Post
    Is that a hydraulic throw out bearing?
    when I did the 5-speed conversion on my TR6 I got rid of the clutch slave cylinder and installed a hydraulic throw out bearing. I like it!
    do you have pics? Also, how did you determine which bearing to use? and, how do you bleed one of these puppies?

    thanks!
    John-Peter Smit
    1976 MG Midget
    1969 Vauxhall Viva GT
    1958 Fiat Multipla (Barn art)

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    Yoda Gliderman8's Avatar
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    Re: Midget Thrust bearing coonversion

    I will look for pics. Bleeding was super easy. As I remember, I let one hose hang down and pumped the clutch until the fluid flowed steady and then reattached the hose end. The hydraulic clutch I used came with the HVDA 5-speed kit that I bought. Here's the installation instruction sheet....
    IMG_3368.jpg
    Elliot
    Central PA
    1976 TR6 White/Biscuit interior SOLD
    1973 TR6 Damson Plum / Biscuit interior, HVDA 5-speed, Good Parts Hubs
    Nostalgia isn't what it used to be.

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    Yoda Gliderman8's Avatar
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    Re: Midget Thrust bearing coonversion

    I found a pic.... hope this helps.
    Quater Master hydraulic clutch.jpg
    Elliot
    Central PA
    1976 TR6 White/Biscuit interior SOLD
    1973 TR6 Damson Plum / Biscuit interior, HVDA 5-speed, Good Parts Hubs
    Nostalgia isn't what it used to be.

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    Darth Vader Rut's Avatar
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    Re: Midget Thrust bearing coonversion

    JP, I researched this conversion and I really liked the idea until my son and I bought a 1993 Jeep Wrangler which comes stock with one. While asking advice on the Jeep forums it became clear that just about everyone had or wanted to change to an external slave cylinder set up because of access when it starts to leak. A lot of these folks are hard core off road people and they have getting home as a priority and a bad/leaking slave really makes that difficult to do considering the terrain. That said, for those of us willing to pull the engine/transmission to fix a leaky TOB it’s a consideration and it removes a lot of potential slop from our clutch system. I’m still on the fence on this one.
    Rut
    Rut, '60 Bugeye, '70 MGB, '62 TR4, '66 TR4a IRS, '67 TR4a IRS, '68 TR4a IRS, '72 TR6

    When I went to school, they asked me what I wanted to be when I grew up. I wrote down 'happy'. They told me I didn't understand the assignment, and I told them they didn't understand life. John Lennon


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    Yoda Gliderman8's Avatar
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    Re: Midget Thrust bearing coonversion

    Rut, no doubt that when/if I have a problem with my hydraulic throw out bearing the trans has to come out and I’m ok with that. Mine has been in for approximately 12-13 years.
    A broken fork pin would also necessitate pulling the trans as well...
    Elliot
    Central PA
    1976 TR6 White/Biscuit interior SOLD
    1973 TR6 Damson Plum / Biscuit interior, HVDA 5-speed, Good Parts Hubs
    Nostalgia isn't what it used to be.

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    Great Pumpkin JPSmit's Avatar
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    Re: Midget Thrust bearing coonversion

    Elliot, where does the second line go in your picture?
    John-Peter Smit
    1976 MG Midget
    1969 Vauxhall Viva GT
    1958 Fiat Multipla (Barn art)

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    Yoda Gliderman8's Avatar
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    Re: Midget Thrust bearing coonversion

    Quote Originally Posted by JPSmit View Post
    Elliot, where does the second line go in your picture?
    JP here's a photo looking up from the bottom of the car. One line goes to clutch master, and the other line (bleeder line) terminates in a mounting bracket attached to a mounting bolt on the bell housing.
    Screen Shot 2019-04-21 at 3.34.19 PM.jpg
    Elliot
    Central PA
    1976 TR6 White/Biscuit interior SOLD
    1973 TR6 Damson Plum / Biscuit interior, HVDA 5-speed, Good Parts Hubs
    Nostalgia isn't what it used to be.

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    Great Pumpkin JPSmit's Avatar
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    Re: Midget Thrust bearing coonversion

    Thanks for this! I wondered if that is what it was. I am tempted (one day) to plumb a similar line at the high point of the 1500 clutch line (higher than the MC)
    John-Peter Smit
    1976 MG Midget
    1969 Vauxhall Viva GT
    1958 Fiat Multipla (Barn art)

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