Zero start 3500022 Engine Block Immersion Heater for Cummins, Paccar, 3/4" NPT Thread | CSA Approved | 120 Volts | 750 Watts. 2002-2006 L6 - 5. 9L Cummins, 2007-2014 Diesel, 6. 7L Cummins Diesel, ISB Series (5. 9L, 6. 7L) QSB (3. 9L, 4. 5L, 5. 9L, 6. 7L), Paccar PX-6, PX-7 (6. 7L).