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Thread: [BAC-Mail] oil cooler ruptured

  1. #1

    [BAC-Mail] oil cooler ruptured

    > Hi everyone,
    >> Then I heard a splat, saw oil all over the windshield and immediately
    > pulled
    > mixture off, throttle off, and key off.
    >
    > It appears the oil cooler split at a fin seam (the seams are crimped over
    > and it just blew open there and separated the seam).
    >
    > hope!). Third, it's odd that this happened after just having changed the
    > oil. I worry I did something wrong but as I described it above, I can't
    > see where we caused anything (hope, hope!). Any ideas?

    *** Nothing I can think of. Maybe it was just ready to blow, and -
    new oil is more viscous than old oil. So it makes more pressure.

    I once installed a new Fram oil filter in a car. Then drove the car
    for the customary half year. Then changed the oil & filter - the filter
    was dry as a bone. Somehow, a fault in the filter caused all the oil to
    go around it. You might want to check inside your new filter.

    Another time, I started another car, and heard a "Pfft-pfft-pfft" under
    the hood. Looked under the car, and there wa a pool of oil on the ground,
    and the filter had blown up like a balloon. Installed another filter,
    started it up, and "pfft-pfft-pfft" again.... Another balloon, another
    puddle. It turned out that the pressure regulator bypass doodad in the
    pump was INOP. A new oil pump cured that one.

    - Jerry Kaidor ( jerry@tr2.com )




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  2. #2

    [BAC-Mail] oil cooler ruptured

    Additional info:

    Outside temp was near 60deg....
    Again, I flew it for 35 minutes first, so oil was plenty warm.

    '78 Sundowner
    A4K 0360
    720 SFRM (will have to check logs to see if any oil cooler issues
    previously)

    Thanks again.
    Rick
    N2010A





    ----- Original Message -----
    From: "Jerry Kaidor" <jerry@tr2.com>
    To: "Rick" <rick@denverflash.com>
    Cc: <musketeermail@yahoogroups.com>; "BAC Mail" <bac-mail@beechaeroclub.org>
    Sent: Wednesday, October 26, 2005 8:53 PM
    Subject: [musketeermail] Re: [BAC-Mail] oil cooler ruptured


    >> Hi everyone,
    >>> Then I heard a splat, saw oil all over the windshield and immediately
    >> pulled
    >> mixture off, throttle off, and key off.
    >>
    >> It appears the oil cooler split at a fin seam (the seams are crimped over
    >> and it just blew open there and separated the seam).
    >>
    >> hope!). Third, it's odd that this happened after just having changed the
    >> oil. I worry I did something wrong but as I described it above, I can't
    >> see where we caused anything (hope, hope!). Any ideas?
    >
    > *** Nothing I can think of. Maybe it was just ready to blow, and -
    > new oil is more viscous than old oil. So it makes more pressure.
    >
    > I once installed a new Fram oil filter in a car. Then drove the car
    > for the customary half year. Then changed the oil & filter - the filter
    > was dry as a bone. Somehow, a fault in the filter caused all the oil to
    > go around it. You might want to check inside your new filter.
    >
    > Another time, I started another car, and heard a "Pfft-pfft-pfft" under
    > the hood. Looked under the car, and there wa a pool of oil on the ground,
    > and the filter had blown up like a balloon. Installed another filter,
    > started it up, and "pfft-pfft-pfft" again.... Another balloon, another
    > puddle. It turned out that the pressure regulator bypass doodad in the
    > pump was INOP. A new oil pump cured that one.
    >
    > - Jerry Kaidor ( jerry@tr2.com )
    >
    >
    >
    >
    >
    > Join BAC today and be a part of the ONLY Type Club for the Musketeer
    > series!
    >
    > www.beechaeroclub.org
    >
    >
    > Yahoo! Groups Links
    >
    >
    >
    >
    >
    >



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  3. #3

    [BAC-Mail] oil cooler ruptured

    Just do a BAC search on 'oil cooler', and you'll find what you need. Engine
    damage is unlikely. Don't know which Rick this is, and the aircraft type
    and engine model isn't mentioned, so it is hard to venture much more of an
    opinion; but It doesn't sound like you literally did anything wrong.

    It is pretty rare, though, for an oil cooler to split a seam. Before
    reinstalling the repaired cooler, ask the shop for their opinion on the
    apparent failure mode. If they opine "over-pressure" as opposed to (for
    example) corrosion or physical damage, I sure would check out the oil
    pressure regulator valve. Oil filters used to be known to have burst
    housings, though that seems to have declined in recent years. Cooler
    failures have been far less frequent.


    -----Original Message-----
    From: bac-mail-bounces@beechaeroclub.org
    [mailto:bac-mail-bounces@beechaeroclub.org] On Behalf Of Rick
    Sent: Wednesday, October 26, 2005 10:46 PM
    To: musketeermail@yahoogroups.com
    Cc: BAC Mail
    Subject: [BAC-Mail] oil cooler ruptured

    Hi everyone,

    I lost my oil cooler this evening and here's what happened. Please feel
    free to analyze the scenario and give me opinions. Obviously, I'm concerned

    about possible engine damage.

    I planned to change oil this evening with a friend so I went to the plane
    and flew it around the pattern four times to warm things up first... saw
    my buddy arrive down below so did a full stop and taxied to the hangar.

    Removed the cowling (disconnected appropriate skeet), drained oil by the
    quick drain. Closed drain. Spun off old filter. Spun on new filter
    (greased the gasket). Safety wired it. Added 7 qts new oil. Pulled it out
    of the hangar for ops check. Primed it. Set full mixture. Starter cranked a

    little longer than usual. I didn't like cranking that long so I let off the

    key. At the exact time I let off the key, the engine caught and it was
    trying to keep running so I worked the throttle to get it going better. I
    looked at the oil pressure and it was nil for about 3-4 few seconds then
    came up.

    Then I heard a splat, saw oil all over the windshield and immediately pulled

    mixture off, throttle off, and key off.

    It appears the oil cooler split at a fin seam (the seams are crimped over
    and it just blew open there and separated the seam).

    I lost about 2 qts when she blew. There's still four on the dipstick and
    some surely in the filter.

    So, first, I'm thankful it happened on the ground!! Second, the engine
    didn't run long at all after it blew so I'm guessing no engine damage (hope,

    hope!). Third, it's odd that this happened after just having changed the
    oil. I worry I did something wrong but as I described it above, I can't
    see where we caused anything (hope, hope!). Any ideas?

    All opinions welcomed...
    and advice on where to get a new cooler and roughly how much am I looking at

    (part and install)

    Thanks all,
    -Rick




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