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Thread: Oily scum in coolant bottle.

  1. 10th July 2019, 06:38 AM #1
    jhsnow
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    Oily scum in coolant bottle.

    Recently purchased a D4 2011 2.7 TDV6 with 256 Km. Coolant level in the tank was very low. Took about 3/4 L to raise to half way. Did not seem to loose any coolant on drive form Melbourne to Sydney.
    The coolant bottle, above the fluid level, had a thin layer of black oily scum on the walls. This wipes off easily where you can get at. Any ideas on cause and what to do about it would be appreciated.
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  2. 10th July 2019, 08:53 AM #2
    DiscoJeffster
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    Hmmm. Oil in the water can indicate a blown head gasket worst case. Best case, what colour is the coolant? I’ve seen cases where coolants of different types/brands have been mixed and this causes a brown scum to form.
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  3. 10th July 2019, 09:08 AM #3
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    Eric SDV6SE
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    Oil cooler leaking into coolant?
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  4. 10th July 2019, 01:05 PM #4
    Graeme
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    If coming from the oil cooler then be aware that replacement gaskets / seals are available for the 2.7, ie there is no need to replace the cooler/filter housing assembly.
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  5. 10th July 2019, 03:45 PM #5
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    Oil cooler, and don't forget to replace the expansion bottle and cap too.
    The Isuzu 110. Solid and as dependable as a rock, coming soon with auto box😊
    The Range Rover L322 4.4.TTDV8 ....probably won't bother with the remap..😈
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  6. 10th July 2019, 03:47 PM #6
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    justinc
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    Quote Originally Posted by Graeme View Post
    If coming from the oil cooler then be aware that replacement gaskets / seals are available for the 2.7, ie there is no need to replace the cooler/filter housing assembly.
    At 265k Graeme, I'd be replacing the whole shebang. It is a labour headache so only want to-do it the once...😁
    The Isuzu 110. Solid and as dependable as a rock, coming soon with auto box😊
    The Range Rover L322 4.4.TTDV8 ....probably won't bother with the remap..😈
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  7. 10th July 2019, 04:00 PM #7
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    Quote Originally Posted by justinc View Post
    Oil cooler, and don't forget to replace the expansion bottle and cap too.
    Are trans cooler and inter cooler ever suspects for this?
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  8. 10th July 2019, 04:31 PM #8
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    Not in my experience, no. I have replaced many engine oil coolers over the years....
    The Isuzu 110. Solid and as dependable as a rock, coming soon with auto box😊
    The Range Rover L322 4.4.TTDV8 ....probably won't bother with the remap..😈
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  9. 10th July 2019, 05:30 PM #9
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    justinc
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    ... the valley will be deep in oily coolant,, too...
    The Isuzu 110. Solid and as dependable as a rock, coming soon with auto box😊
    The Range Rover L322 4.4.TTDV8 ....probably won't bother with the remap..😈
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