What's the level of difficulty in changing head gasket on 99 jeep cherokee sport i-6 4.0l?

Relatively easy.The 4 liter is a redesign from the 4.2 liter I6 carbeurated. the 4 liter was slightly down sized to allow for fuel injection. After removal of the air induction system, (easy), the head needs removed, which is located on the top in an I6 engine.Slightly loosen each bolt, don%26#039;t remove a whole bolt before loosening every one. Don%26#039;t remove the bolts in a row, switch around the perimeter to avoid stress cracks. Make sure that all debirs is removed from the head and head mount before applying the new gaasket. I usually use a heat-rated silicone for additional sealant properties. Put all the bolts back in and tighten just like you removed them, i.e. tighten the left side bolt, then a right side, then a top. Good Luck!!|||How mechanically inclined are you?