LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 1978 >> Cosmo Standard Trans >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> RX-4 & COSMO Rotary Engine >> Engine Assembly >> Installing Front Rotor
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Installing Front Rotor

  1. Mount front housing on work stand (49 0839 000) and special hanger (49 1114 005). Turn front housing on stand so that top of housing is upward. Apply engine lubricant to internal gear of rotor. Hold apex seals in place by using the old "O" ring and position rotor assembly on front housing. Turn housing so that sliding surface of front housing faces upward.
    Fig 1: Positioning Rotor Apex for Reassembly
    G09334518Courtesy of MAZDA MOTORS CORP.
  2. Mesh internal gear and stationary gear so that one of the rotor apexes is set to any one of the four positions as illustrated. Remove old "O" ring. See Fig 1.
    NOTE: Take care not to drop corner seals into ports.