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Miller car shield screw scrapped how to get off

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Bryanesk, Jul 15, 2024.

  1. Bryanesk

    Bryanesk Junior Member

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    Hi so have a miller cat shield. Looked underneath cause was getting a p0137 code so I try to take it off and the screws are literally screwed. Best way to take these out and replace them? Only 3 actually connect to the frame of the car
     

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  2. Tombukt2

    Tombukt2 Senior Member

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    Well they make speedy outs they make reverse twist drills also so instead of righty tighty they turn lefty loosey so when they catch a lot of times they'll just spin the threaded shaft out as they bite into the meat of the head of the vault carbide bits will be needed here if those are truly stainless steel bolts but they'll be low grades stainless generally with these kinds of things I doubt you'll grab onto the heads of those with anything reasonable than Erwin has some sockets that you would literally beat on the heads of these damaged bolts lefty loosey right on out get them out of the bit socket and do the next one.
     
  3. TMR-JWAP

    TMR-JWAP Senior Member

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    It would take 3 minutes to grind the heads off. Drop the plate and there will be ~1/4 inch of fastener sticking out that you can grab with pliers and unscrew the remaining portion.
     
  4. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Yup, angle grinder. Wear eye protection...
     
  5. Bryanesk

    Bryanesk Junior Member

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    sorry how would I drop the plate. So those 3 bolts are connected to the frame of the car. Do you mean like loosen the other screws?
     
  6. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    When the head is ground off the bolt is no longer going to hold anything.
     
  7. Tombukt2

    Tombukt2 Senior Member

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    I'm not sure that the cat shield is a quarter inch plate but it'll be 3/16 or something grind off the heads yes and then your dikes or your fingers may remove what sticking out the 3/16 to the quarter inch usually a lot of people have those silly Erwin sockets You just smack them on there twist it off one turn then it'll come by hand and do the other two or three and you're done no grinding no nothing but if you have nothing but the grinder then it won't take seconds to knock all three of the heads off those bolts in the plate will hit you in the head if you're not careful because there's no bolt heads plates falling off
     
  8. TMR-JWAP

    TMR-JWAP Senior Member

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    Look at the photos. There's all kinds of washers under the fastener head. There will be plenty of material to grip onto after head removal.
     
  9. BiomedO1

    BiomedO1 Senior Member

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    If you don't have an angle grinder - you can use the largest drill bit you've got. Drill down the center of the bolt. When you get down to the stem of the bolt, the head will just fall off. Use vise-grips to back the headless bolt stem off.
     
  10. Bryanesk

    Bryanesk Junior Member

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    Update just hit up miller cat to get a replacement and they’ll be able to send some soon thanks everyone I’ll try what you guys said and post and update when done