Using WD-40 Specialist Penetrant when replacing sparkplugs is a complete ‘no brainer’ for those wanting to make the job as easy and pain free as possible.
Extracting sparkplugs, be it to simply clean or replace them, is a task high on the servicing job sheet when working on petrol engines, whether it’s for the family mower or trusted family runabout!
All too often, that integral piece will be tightly secure, it can be seized. Yes, there’s a specialist tool to help with the job but, the worst-case scenario ends up with a broken porcelain head. Before opting for good old brute force, a technician of any worth should reach for a can of WD-40 Specialist Penetrant and spray around the relevant areas after initially opening the bonnet to let the solution do its work.
WD-40 Specialist Penetrant has an extremely low surface tension, meaning it can cut through rust, seams and tightly bonded threads, effectively loosening stuck or seized parts quickly and easily. After a short while, reach for a plug socket and gentle ease the item out. For those sparkplugs that are still firmly in place, it would be wise to spray the area again, wait several minutes and try again.
