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Thread: 4BD1 Rebuild - final piece of the puzzle - gasket needed?

  1. 15th November 2017, 10:00 AM #1
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    4BD1 Rebuild - final piece of the puzzle - gasket needed?

    Hello all. The saga is approaching the end, but it appears I received an incorrect gasket and need to find the correct one. The manual has the part number noted as "5-11179-075-0", but according to Isuzu USA they don't have that part number. When they cross referenced it and sent what they thought would match it's too big and doesn't match. While the rear crankshaft oil seal is now in and appearing to hold oil just fine I can't get this on the dyno without the proper gasket.

    Any guidance on what the correct part number may be, where to source it? I found on an Isuzu excavator site (OTTO EXCAVATOR PARTS CO., LIMITED - hitachi isuzu parts) that they can get it, but want to make sure whether anyone down under has better / more timely suggestions from experience?
    Scratching my teenage itch now that I'm in my midlife crisis...
    '87 110 County 4BD1+T+LP (Godzilla)
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  2. 16th November 2017, 09:59 PM #2
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    Which gasket is it Todd?
    Cheers......Brian
    1985 110 V8 County
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  3. 17th November 2017, 03:02 PM #3
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    Turns out there are two, a rear breather (which I've managed to secure via Patterson-Cheney there) and the other, which when it's cross referenced here we get the wrong size (too thick) is the valve cover gasket. Isuzu US believes this to be an Australia specific part as the one available via Isuzu industrial here is also too thick, though the proper size otherwise.
    Scratching my teenage itch now that I'm in my midlife crisis...
    '87 110 County 4BD1+T+LP (Godzilla)
    '88 110 Perentie Cargo 4BD1+T+LP (Thing1)
    '91 110 Perentie Cargo 4BD1+T+LP (Thing2)
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  4. 17th November 2017, 05:45 PM #4
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    If you are talking about the rubber gasket that goes under the rocker cover there are 2 numbers depending on whether its a NA or a turbo motor
    NA motor part number is 5111730160 and the turbo one is 8944625590
    Cheers......Brian
    1985 110 V8 County
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  5. 18th November 2017, 12:52 AM #5
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    Thank you. Yes, I think I'm after 49-1 in the attached pics. The list shows 2 different numbers for 49-1 and I 1 of them here that came from Isuzu USA and it's wrong. Part# ending 5590 is what I appear to have here, 1/4" thick but need ~3/16 to 7/32 thick.

    Should I try Patterson-Cheney on this now that you've helped me sort which one I need?

    Resized_20171115_101705_1968.jpgResized_20171115_101725_1487.jpgResized_20171115_101740_1027.jpgResized_20171115_101824_1251.jpg
    Scratching my teenage itch now that I'm in my midlife crisis...
    '87 110 County 4BD1+T+LP (Godzilla)
    '88 110 Perentie Cargo 4BD1+T+LP (Thing1)
    '91 110 Perentie Cargo 4BD1+T+LP (Thing2)
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  6. 18th November 2017, 08:28 AM #6
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    Did you try that NA motor part number in my post in the states. That engine was used a lot in excavators etc. Surely there must be one there instead of having to import it from here.
    Cheers......Brian
    1985 110 V8 County
    1998 110 Perentie GS Cargo 6X6 ARN 202516 (Brutus)
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  7. 18th November 2017, 04:30 PM #7
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    According to both Isuzu commercial and industrial, for some reason that specific part number is import only from Australia. They cannot get it here.
    Scratching my teenage itch now that I'm in my midlife crisis...
    '87 110 County 4BD1+T+LP (Godzilla)
    '88 110 Perentie Cargo 4BD1+T+LP (Thing1)
    '91 110 Perentie Cargo 4BD1+T+LP (Thing2)
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  8. 18th November 2017, 07:17 PM #8
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    Quote Originally Posted by Bearman View Post
    Did you try that NA motor part number in my post in the states. That engine was used a lot in excavators etc. Surely there must be one there instead of having to import it from here.
    I'll have a look in the morning. I probably have a spare one of those here.
    Cheers......Brian
    1985 110 V8 County
    1998 110 Perentie GS Cargo 6X6 ARN 202516 (Brutus)
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  9. 19th November 2017, 01:45 PM #9
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    Pretty sure this is the one you are after Todd. Let me know if you want to freight it over to you. It's a wedge shaped one which looks like the goods for your rocker cover.Isusu rocker cover gasket 001.jpg
    Cheers......Brian
    1985 110 V8 County
    1998 110 Perentie GS Cargo 6X6 ARN 202516 (Brutus)
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  10. 20th November 2017, 02:04 PM #10
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    Quote Originally Posted by Bearman View Post
    Pretty sure this is the one you are after Todd. Let me know if you want to freight it over to you. It's a wedge shaped one which looks like the goods for your rocker cover.Isusu rocker cover gasket 001.jpg
    Sorry for the delay. I've been up on a roof for five ten's demolishing it with a friend in preparation for a second story addition. Yes please and thank you Brian - please email me with any details. Yet again, you are a life saver on this.
    Scratching my teenage itch now that I'm in my midlife crisis...
    '87 110 County 4BD1+T+LP (Godzilla)
    '88 110 Perentie Cargo 4BD1+T+LP (Thing1)
    '91 110 Perentie Cargo 4BD1+T+LP (Thing2)
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