Where should the dial indicator pointer be placed when checking flywheel face runout?

Where should the dial indicator pointer be placed when checking flywheel face runout?

• A. Engine block
• B. Clutch cover
• C. Flywheel face
• D. Transmission case

Answer: (C)

The dial indicator should contact the flywheel face itself. Measuring flywheel face runout means checking how true and flat that mating surface is as the crank is rotated, so the indicator’s probe must touch the flywheel face and be perpendicular to it. This setup directly reveals any wobble or deviation in the surface that the clutch disc will ride against. Placing the indicator on the engine block, clutch cover, or transmission case wouldn’t measure the flywheel’s surface truth and could miss runout that affects clutch engagement and drivetrain smoothness.

The dial indicator should contact the flywheel face itself. Measuring flywheel face runout means checking how true and flat that mating surface is as the crank is rotated, so the indicator’s probe must touch the flywheel face and be perpendicular to it. This setup directly reveals any wobble or deviation in the surface that the clutch disc will ride against. Placing the indicator on the engine block, clutch cover, or transmission case wouldn’t measure the flywheel’s surface truth and could miss runout that affects clutch engagement and drivetrain smoothness.