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External Oil Cooler

Discussion in 'Bay Tech Clinic' started by tinman, May 14, 2007.

  1. t2pickup

    t2pickup New Member

    Coal Valley Tas
    Most oils wont provide much lubrication at the temps some of you are reporting, most provide viscosity stability only to around 120 deg and beyond that its good luck. Certain brands of oil give better oil viscosity at higher temps, but even they stop at around 135-140 deg.
    Oil temp senders get put in some fairly poor locations, some getting errors in their readings due to proximity of other hot engine parts. A good idea is to get a special hole tapped into the case, sort of behind and to the side of the oil pump. Best done at rebuilt time. With oil temps nearing 130 deg, head temps are over or close to the 300 mark. The hotter the oil the thinner it becomes and hence the "No pressure" engine goes bang drama.
    Oil coolers with thermo fans are the only way to go i reckon, and always in line with the factory cooler, as advised. In Colder climates, the oil cooler should have an "oil thermostat" fitted, stops cold oil (obviously thicker) blowing out the oil cooler, when cold it bypasses oil back through the factory oil cooler only, and as it heats up, puts the after market cooler into the circuit.
    Cheap guages also give some dubious readings, but as long as they tell you the poor ol bus is real hot, i guess they are good enough, but dont rely on them to the degree or ten!!:)
    Last edited: May 19, 2007
  2. Volksaddict

    Volksaddict Member

    Sawtell mid northcoast NSW
    If you fit an oil temp guage you will go potty ...dont do it ..just make sure you follow all the advice re seals & tune

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