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1991 Mazda Protege Question: DRAIN PLUG LEAKS

 

Question

anitahayes, 1.8L 4 Cylinder, Laguna Niguel, CA, February 05, 2011, 11:55
 Rookie

DRAIN PLUG HAS BEEN LEAKING FOR 2 YEARS. MECHANIC TELLS ME THE THREAD IS WORN AND THE WASHER DOEST STOP THE LEAK. I DONT WANT TO CHANGE THE OIL PAN, WHAT DO YOU THINK OF ADDING TEFLON TO THREAD? ANITA

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  • Answer #1

    louis1953 from AGCO Automotive Corporation, February 05, 2011, 12:11
     Technician

    The threads are not the sealing area and teflon will normally not be effective. You might check on an oversized plug. These often at least temporarily solve the problem. You might also try having the drain hole drilled and tapped to a larger size and use a larger drain plug with a good seal ring.

    Here's an article I once wrote on the topic :

    http://www.agcoauto.com/content/news/p2_articleid/118

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    Visitor, February 05, 2011, 13:09

    HI LOUIS, THANKS FOR ARTICLE, VERY HELPFUL. NOW I HAVE TO CONVINCE MY MECHANIC FOR 15 YRS. TO DO THE JOB.
    LET YOU KNOW HOW IT TURNS OUT.
    ANITA

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