If it does, you should have more serious problem than just leaking engine oil. You said the oil is leaking from the rear of the driver side cylinder head. There are (2) 17mm allen head screw-in plug on the back of each cylinder head. The top one is for oil and the bottom one is for coolant. Can you find out where the oil cominf from. Also, how good are those JB weld? Do they stick on metal pretty good? How strong they are once they are harden?