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Thread: 3.0 TDV6/SDV6 higher mileage bearing failure theory

  1. 29th November 2024, 09:38 PM #21
    Graeme
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    Yes, since fitting an oil pressure gauge I've been dropping my 4.4 to 7th to crest rises to avoid loading-up the bearings at 1000 rpm and will use 7th on hot days at 100 kph to keep oil pressure up to around 15 psi. The 4.4 has the same big-end and main bearings as the 3.0 except for the rear main and 1 extra main bearing and 2 extra big-ends for almost 50% increase in capacity over the 3.0.
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  2. 3rd December 2024, 10:48 PM #22
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    PerthDisco
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    3.0 TDV6/SDV6 higher mileage bearing failure theory

    https://youtu.be/CTsod8xg5aQ'si=eVP7x48OGOM5PQ8K

    Some small solace you are not alone Toyota copping it lately

    Not one spare D4D engine available in Australia
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  3. 4th December 2024, 06:00 AM #23
    Graeme
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    A reasonably low km replacement engine c/w turbos from a front quarter damaged wreck is in-transit, after its oil filter was confirmed free of glitter. Hopefully the sump from the dead engine can be removed for a quick check before new bearings are fitted to the replacement engine in case there's something else that needs preventative maintenance whilst the sump is off.

    Edit: The OE sputter bearings will be replaced with heavy duty tri-metal bearings even if bearing wear wasn't the cause of the original engine failure.
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  4. 7th December 2024, 02:01 PM #24
    Graeme
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    The 3.0 doesn't have a separate ladder frame as it is incorporated into the sump. Therefore the dead engine's sump won't be removed for a quick check.
    MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi, RTK base station using LoRa
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