Are all Tesoro coils waterproof?
All Tesoro coils are waterproof when they leave the factory. The connector at the coil is waterproof and the coil itself, whether it has a bottom or is of the open design, is also waterproof. The connector at the coil housing is not user serviceable and should never be turned or removed. Permanent damage will result if this is attempted. What is not waterproof is the end of the coil wire that plugs into the housing. The electronics housings are also not waterproof, except for the water models.
