How to check the camshaft timing of a diesel engine?
Flowchart for Repair or Replacement of Gear Train and Engine Timing – Part 3 of 3 When an engine is out of time, the camshaft timing can be checked by following the camshaft timing check procedure. Refer to “1.28.6.1 Testing of Camshaft Timing for Diesel Engines” .
Is the camshaft in time with the crankshaft?
The camshaft must be in time with the crankshaft timing gear. Since there are three gears between them, timing marks have been stamped or etched on the face of the gears to facilitate correct gear train timing.
Where is the timing gear located on a 12.7 liter engine?
The crankshaft timing gear is a helical gear that is indexed to the crankshaft by a key. It is pressed onto the end of the crankshaft. The inside diameter of the 12.7 liter engine crankshaft timing gear is slightly larger than the 11.1 liter engine gear. The current 12.7 liter engine gear can be identified by an “O” on the front face of the gear.
Where is the camshaft idler gear located on a Detroit Diesel?
The camshaft idler gear is mounted to the rear of the bull gear on the same carrier, and rotates along with the bull gear at the same speed. This camshaft idler gear drives the adjustable idler gear, which in turn, drives the camshaft drive gear. See Figure “Gear Train and Related Parts” . 1. Bull Gear Retaining Nut 14.
Which is the correct gear train timing gear?
The camshaft idler gear drives the camshaft drive gear through an adjustable idler gear. The camshaft must be in time with the crankshaft timing gear. Since there are three gears between them, timing marks have been stamped or etched on the face of the gears to facilitate correct gear train timing.
Where is the timing gear located on the crankshaft?
The crankshaft timing gear, pressed onto the front end of the crankshaft, directly drives the bull gear and oil pump drive gear, and indirectly (through the bull gear), drives the fuel pump drive gear, air compressor and power steering pump drive gear, accessory pulley drive gear and water pump drive gear.