4TNV98 & 4TNE98 Diesel Engine Section 5. Cooling System202WARNINGBURN HAZARD!If you must drain the engine oil while it is stillhot, stay clear of the hot engine oil to avoidbeing burned.ALWAYS wear eye protection.Failure to comply could result in death orserious injury.CAUTIONFLYING OBJECT HAZARD!ALWAYS wear eye protection when servicingthe engine and when using compressed air orhigh-pressure water. Dust, flying debris,compressed air, pressurized water or steammay injure your eyes.Failure to comply may result in minor ormoderate injury.CAUTIONPINCH HAZARD!Carefully rotate the alternator toward thecylinder block while loosening the V-belt.Failure to comply may result in minor ormoderate injury.CAUTIONOnly use the engine coolant specified. Otherengine coolants may affect warranty coverage,cause an internal buildup of rust and scaleand/or shorten engine life.Prevent dirt and debris from contaminating theengine coolant. Carefully clean the radiator capand the surrounding area before you removethe cap.NEVER mix different types of engine coolants.This may adversely affect the properties of theengine coolant.CAUTIONIf the engine coolant pump must be replaced,replace the engine coolant pump as anassembly only. Do not attempt to repair theengine coolant pump or replace individualcomponents.CAUTIONUse a new special O-ring between the enginecoolant pump and the joint. Be sure to use thespecial O-ring for each engine model. Althoughthe O-ring dimensions are the same as acommercially available O-ring, the material isdifferent.
