327 oil drain plug ? - Team Camaro Tech
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post #1 of 4 (permalink) Old Nov 8th, 19, 11:11 AM Thread Starter
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327 oil drain plug ?

My drain plug, 3/4" head, is slit on the threaded shaft both directions and appears to be slightly tapered. It threads in lose but tightens as it gets to flush with pan.

Is this a "oversize" plug or were the originals like this?

All replacement plugs I see are just 1/2-20 solid shaft/thread plugs with single or double oversize ones also available for worn thread pans
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post #2 of 4 (permalink) Old Nov 8th, 19, 11:32 AM
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Re: 327 oil drain plug ?

You may have a replacement drain plug that cut it's own NPT tapered threads in a striped out or cross treaded oil pan. We used to sell them as TBA in the gas stations that I worked on back in the early sixties.

Big Dave
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post #3 of 4 (permalink) Old Nov 8th, 19, 12:05 PM Thread Starter
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Re: 327 oil drain plug ?

would a stock pan use a 1/2x20 or were they NPT or a specific tapered thread?
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post #4 of 4 (permalink) Old Nov 8th, 19, 02:40 PM
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Re: 327 oil drain plug ?

1/2-20, not pipe, had a dog pecker tip, but not otherwise tapered.

Jon N

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