1JZ-GTE preventive rod bearing change

Thread in 'Technical Questions' started by Frederico Monteiro, Dec 19, 2019.

  1. Frederico Monteiro

    Frederico Monteiro New Member

    Dec 19, 2019
    Likes Received:
    I've searched for an thread related to this but couldn't find any information.
    I have recently bought an Toyota Mark 2 with an single turbo 1JZ running with around 550 whp and 1kg of boost and i have been wondering if I should do a preventive rod bearing change. The engine is running with this configuration since 2004 and is probably the most reliable built 1JZ i have ever seen, absolutely no problems in all this time. It's a full track car. But the previous owner was not so careful with oil changes and did not use good oils, only cheap mineral oils changing them every 3 events, This has made a little worried with how good or bad my rod bearings are. Do you guys think it's an good idea to change the rod bearings as preventive maintenance? The engine runs perfect with very high oil pressure all the time.
    I will start using Motul 300v on the engine, not sure which viscosity, what do you guys recommend?
    Thank you for your attention,
    Greetings from Brazil
  2. Jay1017

    Jay1017 Member

    Oct 9, 2016
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    If the oil pressure is fine there is no need.

    compare oil pressure to whats stated in the service manual, if it’s equal then don’t bother. If it’s a lot lower than stated, then change them including the main bearings.
  3. doninphi

    doninphi Member

    Apr 9, 2006
    Likes Received:
    If you do. Rock auto in America stocks all the parts by quality brands and far cheaper than Toyota.

    All the best

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