6-46. Insert the oil level gauge/dipstick into the oil fillerhole, and then tighten it securely.7. Connect the oil level gauge coupler.ESU00086CoolantCheck the coolant level in the coolant reservoir when theengine is cold. If the coolant level is below the“COLD LEVEL” mark, add soft water until it reaches the“COLD LEVEL” mark. (See pages 8-13–8-14 for moredetails.)1 “COLD LEVEL” markWARNING@Do not remove the coolant reservoir cap when theengine is hot.@CAUTION:@ Hard water or salt water is harmful to the engineparts. You may use boiled or distilled water, if softwater is not available. Tap water can be used temporarily in an emer-gency.@