29-08-15, 08:19 AM
As it's a bank holiday weekend most places are closed but pop into your local machine mart & pick up a spark plug thread chaser (little double ended tool) clean the thread with this nice & slowly, gently working it back & forth with plenty of lubricant then if you can blow the area clean with air when you install the new plug put a tiny bit of copper grease on the thread but not near the washer as it doesn't compress!