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Home >> Mazda >> 1981 >> RX-7 GSL, Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> RX-7 Rotary Engine >> Engine Oiling >> Oil Cooler

Oil Cooler

  1. Inspect oil cooler for damage, cracks and leakage. Any defects found are repaired by aluminum welding or replacement.
  2. Drain engine oil and remove engine under cover. Remove cap nut at bottom of oil cooler and pull out by-pass valve.
  3. Check by-pass valve after removing it from bottom of oil cooler. Heat and soak by-pass valve in oil gradually to 158°F (70°C) and check if protrusion of valve exceeds 0.2" (5 mm). If less, replace by-pass valve.
  4. Install by-pass valve in reverse of removal procedure and fill engine with oil.
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