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    #1

    oil leaks

    my 87 vc wag is leaking oil underneath and i cant find where its coming from pan bolts are tight oil drain plugs are tight im lost
    Tags: None
    #2
    if it's rusty, the oil pan itself has been known to rot right through. If it's still a pinhole it might look like just a gasket or drain plug.

    Try using some brake cleaner to get all the oil gone, and then letting it sit for a day or two and looking again.

    85 4 door 351 Civi Crown Victoria - Summer daily driver, sleeper in the making, and wildly inappropriate autocross machine
    160KMs 600cfm holley, shorty headers, 2.5" catted exhaust, 255/295 tires, cop shocks, cop swaybars, underdrive pulley, 2.73L gears.
    waiting for install: 3.27's, Poly bushings, boxed rear arms, 2500 stall converter, ported e7's, etc

    06 Mazda 3 hatch 2.3L 5AT (winter beater that cost more than my summer car)

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      #3
      Even though the bolts are tight, it can still leak if the gaskets are old and dried out.

      Could be the front or rear main seal also. Best bet is to clean the area good and then watch for new accumulations
      2000 Grand Marquis LS
      2000 F150 XLT 6 inches of lift.
      1987 Bill Blass Mark VII - Sold
      1985 Mercury Grand Marquis Colony Park- SOLD. to a little old lady
      Mercury Owners Group member
      Save The Whales, Restore an Old Station Wagon!!

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        #4
        Originally posted by johnunit View Post
        if it's rusty, the oil pan itself has been known to rot right through. If it's still a pinhole it might look like just a gasket or drain plug.

        Try using some brake cleaner to get all the oil gone, and then letting it sit for a day or two and looking again.
        I done heard about them there crappy steel oil pans. Excellent advice.

        And it sucks x 2 because you have to lift the dang engine to change them!

        Pete
        Originally posted by gadget73
        For other types of inquiry, more information is required. Please press 4 to speak to a representative who can help you with your question. This call may be monitored for quality assurance purposes.


        2003 Grand Marquis Ultimate, the "Stealth Bomber": http://www.grandmarq.net/vb/showthre...-Grand-Marquis
        1991 S-10, 'Bulldog', 2.5l 5 speed: http://www.grandmarq.net/vb/showthre...375#post698375
        1985 Town Car, 'Faded Glory', gone but not forgotten. 84/87/91/97 MGMs too.

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          #5
          My oil pan has been rusted through for 3+ years now. Permatex RTV silicone is keeping it all in!
          ~David~

          My 1987 Crown Victoria Coupe: The Brown Blob
          My 2004 Mercedes Benz E320:The Benz

          Originally posted by ootdega
          My life is a long series of "nevermind" and "I guess not."

          Originally posted by DerekTheGreat
          But, that's just coming from me, this site's biggest pessimist. Best of luck

          Originally posted by gadget73
          my car starts and it has AC. Yours doesn't start and it has no AC. Seems obvious to me.



          ​

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            #6
            When's the last time the PCV valve and screen have been changed? If the screen is clogged, you will ultimately blow engine seals all over. I lost my intake manifold, valve cover and front main seal from a clogged pcv screen. If you change it, it may leak less if it's a massive leak.

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              #7
              My sympathies to your mechanic for the impending oil pan job Mine had a hole rot right on through it, though the leak was very slow at first it got bigger quick.
              sigpic


              - 1990 Ford LTD Crown Victoria P72 - the street boat - 5.0 liter EFI - Ported HO intake/TB, 90 TC shroud/overflow, Aero airbox/zip tube, Cobra camshaft, 19lb injectors, dual exhaust w/ Magnaflows, Cat/Smog & AC delete, 3G alternator, MOOG chassis parts & KYB cop shocks, 215/70r/15s on 95-97 Merc rims

              - 2007 Ford Escape XLT - soccer mom lifted station wagon - 3.0 Duratec, auto, rear converter delete w/ Magnaflow dual exhaust

              - 2008 Mercury Grand Marquis Ultimate Edition - Daily driver - 4.6 2 valve Mod motor, 4R75E, 2.73s. Bone stock

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                #8
                Y'know, a lot of times it's the valve cover gaskets leaking way in the back where it's hard to see. Then the leak just runs down the back of the engine. I remember when I had my 81' (351w), what I thought was rear main seal tuned out to be just that.... valvecover gaskets.
                Former panther owner
                1981 CV 351 4bbl
                1991 CV 302 EFI

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                  #9
                  rear of the lower intake also dumps oil and it runs down the back of the motor. Degrease it, and see where the oil is coming from. Its hard to determine anything if its all goopy.
                  86 Lincoln Town Car (Galactica).
                  5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

                  91 Lincoln Mark VII LSC grandpa spec white and cranberry

                  1984 Lincoln Continental TurboDiesel - rolls coal

                  Originally posted by phayzer5
                  I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

                  Everything looks like voodoo if you don't understand how it works

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