socket down camshaft drive chain slot
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Northstar Engines and System Technical Discussion Discussion, socket down camshaft drive chain slot in Cadillac Engine Technical Discussion; Bad day in the garage. While tightening down the front camshaft bearing bolts, the 10mm socket I was using slipped ...
  1. #1
    rudie2two is offline Cadillac Owners Member
    Automobile(s): 2002 Deville DTS
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    socket down camshaft drive chain slot

    Bad day in the garage.

    While tightening down the front camshaft bearing bolts, the 10mm socket I was using slipped off and I think bounced down the front slot with the camshaft drive chain. After looking everywhere else (just in case the socket didn't go down the slot), I got out the borescope and went searching. I didn't see anything all the way down to the oil pump. If it's down there, it's all the way at the bottom or some other crevice.

    Assuming that the socket did go down the drive chain slot, which should I pull first to look for it - (1) the engine front cover or (2) the oil pan.

    Thanks for any suggestions.

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  3. #2
    bsamole is offline Cadillac Owners Member
    Automobile(s): 2000 Deville DHS 94,000 Y engine
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    Re: socket down camshaft drive chain slot

    I would try a telescoping magnetic. If the socket FELL down then it should not be wedged and the magnetic may grab it. Otherwise I'd pull the front cover although it is not a fun task as I am currently replacing mine.

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: socket down camshaft drive chain slot

    I once dropped a distributor lock nut down the distributor shaft hole of a 4.1. I fished for it with a magnet for 2 hrs. Every time I got it the magnet would grab the side of something and I'd loose it. Finally I heard it hit the bottom of the pan..............which is where it spent the rest of it's life.

    Maybe these pics will help.








  5. #4
    rudie2two is offline Cadillac Owners Member
    Automobile(s): 2002 Deville DTS
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    Re: socket down camshaft drive chain slot

    Tried fishing with a magnet, but didn't get anything except the camshaft chain.

    Thanks for the pictures. Judging from the pictures and what I saw in the borescope, the socket is probably fell all the way to the front part of the oil pan. My big worry was that a piston rod would kick it up and put it through the block. From what I can see, there really really isn't a way between the front area and the crank area that a socket would fall through. Adding the presence of the oil pan baffle separating the crank from the oil pan, I feel better about leaving the socket sit in the bottom of the oil pan.

    I think I'll turn the crank over a few times by hand to see if there's any clanks or jamming. If not, I'll assume the socket is in the oil pan and just leave it there until the engine needs overhauling.

  6. #5
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: socket down camshaft drive chain slot

    A connecting rod - or even the crank throws - cannot get to a dropped socket in there - most likely its down in the lower area. BUT there's a (good) possibility that it could be sitting in a saddle formed by a timing chain and a gear. In that event, starting the engine would result in instant, disastrous destruction. Big time.

    If it made it to that small oil drain slot for the chaincase-to-pan it can sit there forever.

    Pull all 8 plugs and carefully roll the engine over with a breaker bar - clockwise.

  7. #6
    rudie2two is offline Cadillac Owners Member
    Automobile(s): 2002 Deville DTS
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    Re: socket down camshaft drive chain slot

    Thanks for the advice. Turned over the engine at least one complete revolution by hand. No clanks, clunks or jamming.

    Bumped the starter, but didn't start the engine. Again, no clanks, clunks or jamming.

    Started the engine. No clanks, clunks, or jamming!

    I really appreciate the advice given here. It saved me a lot of stress.

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