My local shop last changed my plugs during a head replace. I just pulled off the coil pack to diagnose a P0301 cylinder #1 missfire. This stuff was all over the plugs and springs.
It looks like dielectric grease. I put a light coating of dielectric on the rubber plug cap from sticking. It looks like they used a lot more than required.
It looks like dielectric grease. I put a light coating of dielectric on the rubber plug cap from sticking. It looks like they used a lot more than required.