The Laser Diesel Engine Fuel Pump Timing & Locking Kit 2688 is A superbly comprehensive set of essential diesel engine timing tools. It enables both engine locking & fuel pump timing to be carried out on a wide range of diesel engines. The kit contains all parts from Laser 2246 & 2247 Diesel Timing Kits. The timing belt drives the camshaft, fuel injection pump & in most cases, the coolant pump on the front of the camshaft.