• 1020E10 oil seal cover (one) - l or r - on counter-rotating shafts - r + r and replace seals
• 1020E16 oil seal cover on left hand counter-rotating shaft - r r engine at bench
• 1020E18 oil seal cover right hand counter-rotating shaft - r r on vehicle
• 1020E20 front oil seal of one counter-rotating shaft, l or r - r + r