5 - 20ENGCAMSHAFT AND CYLINDER HEADCHECKING THE TIMING CHAIN GUIDE1.Check: Exhaust side timing chain guideWear/damage → Replace.CHECKING THE TIMING CHAIN TEN-SIONER1.Check: One-way cam operation (tensioner)Unsmooth operation → Replace.CHECKING THE CYLINDER HEAD1.Eliminate: Carbon deposits (from the combustionchambers)Use a rounded scraper.NOTE:Do not use a sharp instrument to avoid damag-ing or scratching: Spark plug threads Valve seats2.Check: Cylinder headScratches/damage → Replace the cylinderhead cover and cylinder head as a set. Cylinder head water jacketMineral deposits/rust → Eliminate.
