pining the flywheel

Discussion in 'Trucks [ Eighteen Wheelers ]' started by kennry, Nov 23, 2015.

  1. kennry

    kennry Bobtail Member

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    I have a 6nz cat and looking to pin flywheel to find tdc.on the passenger side there is a couple of locations were I think this could be done.iam looking for some pics from you guys.is it the plug that has 2-9/16 bolts holding a flat metal cover on to flywheel housing.or is it the pipe plug right next to it that has to be removed to install 3/8 bolt into.thanks
     
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  3. passenger side. you will see a plate with two bolts in it. one of the bolts is longer that bolt is what you use to pin. there will be a hole right above that plate. it may have a pipe plug in it. just take the plug out and insert the long bolt in that hole. put a little pressure on it while you rotate engine until it falls in the hole in the flywheel.
     
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  4. DONT USE THE STARTER to rotate engine. use the gear that goes in that hole the plate is covering or use a breaker bar and socket on the front of crank.
     
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  5. GrapeApe

    GrapeApe Road Train Member

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    Just like super hauler said. Once I find TDC the first time (#1 or #6), I put a mark on the crank damper. The when you have to go a full turn (or the next time you work on the truck and have to find TDC), you can have someone watch it and let you know when you're getting close. That way you can crank easier with 2 hands, then when you get close slow down and hold pressure on the bolt to find the hole.

    I have come across a few where there wasn't a hole (which I think may have had a bolt broke off in it). Most engines do have another hold on the drivers side, but it's hard to get to with the starter there.
     
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  6. kennry

    kennry Bobtail Member

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  7. kennry

    kennry Bobtail Member

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  8. tony97905

    tony97905 Road Train Member

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    The cover with two bolts holding it is the cover for the barring tool that engages the teeth on the flywheel to rotate the engine. The small hole is where you insert the bolt to pin the engine #1 or #6 TDC. I always liked to jack up RR, put truck in highest gear, release brakes and have someone roll the tire while you're pinning it. Then, like somebody mentioned above, use a paint marker to mark the dampner where the fan belt "intersects" the dampner and you won't need to pin it except for timing purposes....the mark you put on the damlner is close enough for running overhead.
     
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  9. sailboatjim

    sailboatjim Light Load Member

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    This shows where it's located.

     
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  10. pup

    pup Light Load Member

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    why are you pinning the flywheel?
     
  11. Cory wood

    Cory wood Medium Load Member

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    Gonna ask the same question, kinda scary pinning the flywheel to work on the truck if your not sure how to pin it to start with, gonna run an overhead?
     
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