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  1. #1
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    oil drain plug stripped need insturctions helicoil

    someone please shed some light on how to heli coil my oil drain plug for an m20 oil pan. please provide part #'s procedures links write up etc. I'm motivated and want to learn. I've searched the archive but no instructions provided just that either to helicoil or use oversize drain plug. I think helicoil seems like a more permannent/stronger fix than an orersized bolt that can strip aluminum again.


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    Re: oil drain plug stripped need insturctions heli

    The tools to do this properly aren't cheap, so it may be more economical to have a shop that already have the HeliCoil tap, insertion tool, and tang breaker do the repair.Jim Levie, Huntsville, AL
    BMWCCA 335857
    http://www.bmwcca.org

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    It is actually pretty easy........................

    Places like Pep Boys,Napa,Carquest and Kragen should have the helicoil kits, they are cheaper than the time you would spend in your own labor removing the oil pan and taking it to a machine shop.

    The kits come with instructions, but basically you are just drilling the hole out bigger and tapping in new threads for the helicoil.

    Since there will be metal filings from the drilling and thread cutting you need to make sure and pack the drill bit and thread cutter with grease to hold the filings so they dont get into the oil pan.

    The kits come with everything you need to do this, just hold your drill nice and straight so you follow the original hole correctly.
    You want a kit for a 12 x 1.5 mm thread.

    NOTE: If you are not comfortable doing it then take it to a shop that can perform the work.




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  4. #4
    ColinC
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    I did this on my car....

    As Geez says, it's very easy. The whole thing, including draining the oil, changing the filter, and refilling with oil, took me about an hour. If you want to be really [Oops!], save the old oil you drain from the engine, and after you've drilled, tapped, and inserted the heli-coil, leave the drain plug out and pour the old oil in and let it drain out to "wash" any aluminum shavings out of the oil pan. Let it drain thoroughly, then install the drain plug with a new sealing washer and refill the engine with oil. If you do this carefully, the new steel threads are stronger than the original threads, which were tapped directly into the aluminum pan.

    Also, NEVER let a quick lube place change your oil. They are notorious for stripping drain plug threads.

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    Re: oil drain plug stripped need insturctions heli

    My kit was like $35 and came with all of the above and about 10 thread inserts. You don't need a fabulous tap to do this. Cast aluminum is as easy to drill and tap as a block of cheese.

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