it will effect the timing and can couse overheating but not the oil pump.there is a seperate chain for the oil pump that runs the b-shafts.if you go deep enough to do the timing chain then you realy should replace the b's chain also,if it snaps than you loss oil presure and by by moter.

87 dodge power ram 50,35" tires,5 1/2" total lift,4.6 gears,lockers front and rear,Rancho RS5000's,custom front bumper,custom rock sliders,cct extended diff breathers,75 amp alt(40 amp stock),thorely header,K&N,wheeled hard...