SupraMoto's '83 Resto

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  1. #1
    CelicaSupra.com Member SupraMoto's Avatar
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    SupraMoto's '83 Resto

    Hi Everyone,

    I recently got my Supra out of storage where it'd sat for 7 years, being started only occasionally to circulate the fluids.

    I've had the car since 2001, its currently sitting at 255,000 kms. It'd always smoked since I've had it, it needed valve seals at a minimum. Now that I have the time and space I can take care of this and more. After an evaluation of the health of the engine, I've decided to rebuild the motor.

    2007 - Before being put in storage



    2014 - Out of storage and in my garage.


    Interior


    Engine bay
    Last edited by SupraMoto; 11-01-2016 at 01:32 AM.
    '83 Black P-Type

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  3. #2
    CelicaSupra.com Member SupraMoto's Avatar
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    The first bit of work completed previously was to repair the AC, my AC post here.
    I replaced the leaky receiver/drier then purged/recharged and it now works great.
    '83 Black P-Type

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    CelicaSupra.com Member drjim's Avatar
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    Is it the dark maroon color?

    - Jim
    1985 5-speed "Ms. Swan"

    OH, What A Feeling!

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    CelicaSupra.com Member SupraMoto's Avatar
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    Had done a compression test,

    1) 160 psi
    2) 173 psi
    3) 162 psi
    4) 170 psi
    5) 148 psi (148 wet)
    6) 184 psi

    #5 is low, and the maximum spec is 14 psi difference between cylinders.
    '83 Black P-Type

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    CelicaSupra.com Member SupraMoto's Avatar
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    Quote Originally Posted by drjim View Post
    Is it the dark maroon color?

    - Jim
    Terra-cotta interior color I believe. Black exterior.
    '83 Black P-Type

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  8. #6
    CelicaSupra.com Member SupraMoto's Avatar
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    Quote Originally Posted by SupraMoto View Post
    Had done a compression test,

    1) 160 psi
    2) 173 psi
    3) 162 psi
    4) 170 psi
    5) 148 psi (148 wet)
    6) 184 psi

    #5 is low, and the maximum spec is 14 psi difference between cylinders.

    So this explains #5 low compression. There was always pressure down on the #5 intake valve from the camshaft, even when the cam lobe is 180 degrees from the valve. The camshaft and rocker arm are toast.

    I've already picked up a replacement camshaft, cam tower, rocker arms, and hydraulic lash adjusters.

    #5 intake cam lobe


    #5 intake (on the right)
    '83 Black P-Type

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  9. #7
    CelicaSupra.com Member drjim's Avatar
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    I meant the exterior color. The pix looked like it might have been a color other than black.

    Yeah, that engine is pretty much toast.

    When it wipes out a whole cam lobe, a LOT of metal has gone through the engine, and the bearings have probably picked up quite a bit of it.

    New cams are just about unobtainium unless you find somebody who's got a set, and they're extremely expensive.

    Everything else should be available.
    1985 5-speed "Ms. Swan"

    OH, What A Feeling!

  10. #8
    CelicaSupra.com Member SupraMoto's Avatar
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    Quote Originally Posted by drjim View Post
    New cams are just about unobtainium unless you find somebody who's got a set, and they're extremely expensive.

    Everything else should be available.
    Yeah, I went to the wrecker and got a replacement camshaft, cam tower, rocker arms, and hydraulic lash adjusters for $40. They're in pretty good condition, not perfect. They came off a car with only 152 kms according to the odometer.

    Once I saw this damage, I knew the bearings would be toast so that's when I pretty much decided to tear it all down.
    '83 Black P-Type

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    CelicaSupra.com Member SupraMoto's Avatar
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    I pulled the head first, initially I had thought of maybe just doing the top end, I was concerned the cam & rocker would've worn the valve stem and wrecked the guide. I checked and the valve stems are in good condition, the valve to guide clearances are a little loose, but I had the machinist check them out and he said he wouldn't do the guides if it was his.



    After consideration, I decided it'd be best to do the bottom end also since there would've been a lot of metal contamination in the bearings from the worn out cam lobe.



    Last edited by SupraMoto; 08-02-2016 at 12:06 AM.
    '83 Black P-Type

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  12. #10
    CelicaSupra.com Member drjim's Avatar
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    Great work so far.

    You're gonna LOVE driving it when it's all back together!

    - Jim
    1985 5-speed "Ms. Swan"

    OH, What A Feeling!

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