OTC 6768 Glow Plug Release Tool OTC Glow Plug Release Tool for Select Ford Diesel Engines Designed to slip onto the harness caps to safely remove and install glow plug harnesses For 2004 to 2009 Ford 6.0L diesel engines Manufactured from heavy duty stamped and formed steel - coated to prevent corrosion Tool can be reshaped by user to work around the heater box clearance issues on select vehicles