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Thread: Plastic in pan

  1. #1

    Plastic in pan

    I have a 63, 401 nailhead that i have yet to run. I took off the oil pan to change the gasket and i found some pieces of plastic. Does anyone know what it could be?

  2. #2
    More than likely from the cam gear. Pull the timing case cover. I have neoprene front & rear seals & those stock type cam gears in stock. Plus many other parts.

    Tom T.

  3. #3
    They had plastic cam gears? What would cause that to break?

  4. #4
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    Only the upper gear has plastic teeth. This is common on a lot of engines. The OEM's used gears with nylon teeth to make them quieter. Chain stretch is what usually causes the nylon to fracture and break off. Most aftermarket timing sets do not employ this type of construction because of the bad rap that nylon gets. It usually gives a pretty decent service life, but when they come apart they are famous for plugging oil pickups. Put a new timing set in it and you'll be fine.

  5. #5
    Be carefull when installing the timing set as these gears have several marks on them that I have seen people mistake for the timing marks. Read your manual and you wont have a problem. Also check the oil pump screen as it is not unusual for the plastic teeth to block the pump, though it is more likely in a Pontiac.
    Jim Carmichael 55 Buick Special & 65 Buick Riviera GS

  6. #6
    Thanks everyone for the info. Im still building the car and dont know when i will get to try and fire the motor. I hope soon. Now i know what im up against.

  7. #7

    testing

    to make sure my signature works
    Tom Telesco
    Classic and Muscle Automotive
    12 Cook St.
    Norwalk, CT 06853-1601
    Day Phone 203-324-6045 ET
    NailHead Mini-Starters '53-'66
    Adjustable Roller Tip Rocker Arms - All NailHeads
    Custom forged pistons
    Front & rear neoprene seals
    Many other "Nail" parts
    "If I can't get it, you don't need it!"

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