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Thread: Bad lobe on roller cam

  1. #1
    Mitsu booster
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    Bad lobe on roller cam

    '88 shadow that I parted had one bad lobe on cam, roller on rocker seized up too, looks like a slider I had like that. Oil in it was really black, will have to pull the rest of the motor apart to see what it looks like.

  2. #2
    Admin- "Alexandria" Ken... Comes W/4 Car Garage Turbo Mopar Staff GLHSKEN's Avatar
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    Re: Bad lobe on roller cam

    I would at least pull the pan and check for debris..
    Ken Adler....
    Cars, A few (9)

  3. #3
    Mitsu booster
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    Re: Bad lobe on roller cam

    Quote Originally Posted by GLHSKEN
    I would at least pull the pan and check for debris..
    Thats a big 10-4

  4. #4
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: Bad lobe on roller cam

    Shitty, oh well, good time to check bearings and replace the oil pump.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

  5. #5
    Mitsu booster
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    Re: Bad lobe on roller cam

    Finally got it apart and found it in better shape than I figured it would be in, there was a very small amount of debrits on the pick-up screen, crank journals are in very good condition and the cylinder bores look good as well. Blown headgasket, (between 1 and 2) I think this was rebuilt cause there are numbers stamped on the rods. Also is .75 on the center of the piston domes? So I think the cam damage is from the roller on the arm seizing.

  6. #6
    turbo addict
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    Re: Bad lobe on roller cam

    The .75 is the piston indicated the size over stock. In this case .75mm or (I'm pretty sure) 0.030 " over bore. Looks like it's been rebuilt.

  7. #7
    Mitsu booster
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    Re: Bad lobe on roller cam

    Thanks, thats what I figured. Crank looks too nice for 160k on the odo and the very nasty oil in it and the overall poor condition of the rest of the car.

  8. #8
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: Bad lobe on roller cam

    Quote Originally Posted by kingofvenus
    . Also is .75 on the center of the piston domes?
    Piston domes? there supposed to be dished pistons?
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

  9. #9
    Mitsu booster
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    Re: Bad lobe on roller cam

    Ooops, my bad. should of said "on the top of" they look like what should be in a block with an '87 date on it. Suppose I'll need to mic the crank to see if (or how much) its been cut.

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