After my successful recent r/r of the valve cover gasket I have decided to go ahead and replace the plugs. I had read that the '94 4.0s came with copper plugs, which were the standard back then. In the event the PO never replaced them, they are way overdue @ 80K+ miles and for an upgrade to single platinum plugs. Only problem is that I notice that #5 and #6 plugs have some pooled oil in their wells, with #6 particularly bad. In fact, I’m amazed it hasn’t interfered with the proper firing of the plug.
Question is, what is the best approach to get the oil out of there before I remove the plugs? Although it IS engine oil, I don’t want to risk too much oil going into the cylinder (i.e. more than a tablespoonful) and causing that nightmare “oil wash” condition. I know usually the standard approach to remove debris around plugs is with an air compressor, but I don’t have access to one. I have tried sticking shop paper towels down into the well with a long screwdriver, letting them soak a bit, and then pulling them up, but that doesn’t seem to be working very well. One idea I have had is that we have a full-service car wash here that has “DIY vacuums”. These vacuums are very powerful. I’m thinking maybe I can use one to vacuum the oil up out of the wells.