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oil leak at back of engine 200 1991

posted by  someone claiming to be butch1 on  Tue Sep 30 15:18 CST 2008 [RELATED]

Oil leaks more after shut down. There is an aluminum cast piece that goes around the back and up the two sides of the oil pan. Oil is coming from the shelf (on that alum. part) which is toward the oil pan. It then drips down to the bolt area at the bottom.

Does this aluminum part come off? I assume so, because otherwise you can't get to the back of the pan.

Is this the pan gasket leaking?







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    oil leak at back of engine 200 1991

    posted by  someone claiming to be 240guru on  Thu Oct 2 06:11 CST 2008 [RELATED]

    IPD sells rear cam seal retaining plate. I have them on both of my 240`s 87 and 88. The seal just fell out one day,luckily I was close to home








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    oil leak at back of engine 200 1991

    posted by  Jorrell on  Tue Sep 30 15:52 CST 2008
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    last visit: Thu Dec 27 03:00 CST 2012
    [RELATED]

    Before you assault the "support bracket", check the rear cam plug at the rear of the cylinder head... it has a habit of popping out and hemorrhaging oil in short order if the flame trap is plugged up.

    If this is a slow leak and this car has an automatic transmission, inspect the transmission cooler lines as they have a habit of rubbing through in the bracket where they are mounted to the transmission flange.

    Beyond that, yes, the pan gasket could be leaking (doubtful), or the rear engine crank seal has given up the ghost. If the rear seal has failed, the trans must be pulled to gain access to the rear engine seal, a painful job.

    jorrell
    --
    92 245 250K miles, IPD'd to the hilt, 06 XC70, 00 Eclipse custom Turbo setup...currently taking names and kicking reputations!








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      oil leak at back of engine 200 1991

      posted by  fborcher on  Wed Oct 1 00:49 CST 2008
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      last visit: Fri Feb 24 13:25 CST 2012
      [RELATED]

      Thanks for your response.
      I have checked the rear cam plug, and it seems to be okay. Was the guy who put the engine up against the firewall related to the guy who did the blower motor?

      I have cleaned everything off, and looked at the transmission lines, which are dry. I will install rubber between clamp bracket and lines.

      I know that others have had pan leaks, so I am hopeful that is the issue.

      I read a number of accounts of replacing the rear seal and still having leaks. A rear main seal leak may not make sense to repair. Not unless it got worse.

      I plan on going over the entire PCV system to relieve that pressure.

      As for the "support bracket", you used the term assault. Is there anything I need to know about taking it off?








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        oil leak at back of engine 200 1991

        uid 18083's pic
        posted by  lucid on  Wed Oct 1 08:14 CST 2008
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        last visit: Fri Oct 24 12:31 CST 2014
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        "As for the "support bracket", you used the term assault. Is there anything I need to know about taking it off?"

        No, just 6 bolts (4 and 2), but IMO you're not likely to find any leaks there. The rear cam seal doesn't habitually pop out either. I've experienced only 1, in about 70+ car-years of 240s. If you're concerned about it, a retaining piece is easy to fabricate, as shown below.

        Installation is admittedly tight, but quite doable.


        --
        Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.









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        Oil leaks, trickly little devils sometimes! 200 1991

        uid 12839's pic
        posted by  Paul Driver of Inga on  Wed Oct 1 06:44 CST 2008
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        last visit: Sun Mar 25 16:42 CST 2012
        [RELATED]

        Hello,

        A suggestion learned here on the BB first of all to see if you have an issue with crankcase ventilation. If you have a metal oil cap, do the rattle test. Start the engine and then twist the oil cap like you are removing it but leave it sitting on top of the valve cover. If it sits there with minor vibration your crankcase has a positive pressure. If it bounces up and down like the relief valve on a pressure cooker, you have a ventilation issue in the engine.

        Now for the oil leak section of the post. Thought I had a rear engine leak on my 86 that turned out to be the breather box, the oil worked its way to the back of the engine and dripped. Also had a leak at the rear of the valve cover where yours truly did a terrible job of installing it. To be honest it was such a greasy mess down under the engine it was hard to find all the places oil came from. Found the valve cover, breather box, and a couple of more small leaks only after under taking an extensive ongoing cleaning campaign on both the engine top and bottom.

        Recently changed the oil pan gasket to fix a small leak and that is a job. Already had the rack off getting it rebuilt so a big part of the job was already done. You have to drop a lot more than the oil pan to change the gasket unfortunately.

        If you want some light reading to give you an idea what is involved check out http://cleanflametrap.com/oilpan/.

        Hope this helps,

        Paul







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