2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 79Get this manual

2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 79

ENGINE Cylinder Head Inspection Thoroughly clean cylinder head (B) surface to remove all traces of gasket material and carbonCAUTION:
the surface of the cylinder head at several different points and measure warpage by inserting feeler gauge between the straight
edge and the cylinder head surfaceIf warpage exceeds the service limit, replace the cylinder head NOTE: To prevent loss of
tension, do not compress the valve spring more than necessary2Remove spring retainer and spring Cylinder Head Warpage Limit:
.002" (.05 mm) NOTE: The valve springs should be positioned with the tightly wound coils against the cylinder head on progressively