How do I adjust valves on a CAT C15 On-highway diesel engine?specifics:435-550 hp 2100 rpm1550-1850 lb-ft 1200 rpm Peak Torqu
The job requires special tools and removing the Jake Brake boxs first. If you havent ever done a valve ajustment on a diesel before, or ajusted Jakes before dont attempt.
c15 don't need to remove jakes just back off valve actuators and jakes before adjusting valves they need to be set with overhead to but you cant adjust till valves are adjusted first. I think valve actuators are 20 and 3o for jake but mite want to check first
Ive gone 100s of these but that was 6 years ago. I do know you will need a special socket to spin the engine over till the bolt drops in the hole on the flywheel. and allen wrenches, feeler gauges, and deep offset boxed in wrenches, and a torque wrench for putting the exhaust brakes back on. Its pretty easy and only takes an hour or so. You will not need any gaskets, they are reusable rubber. The Main thing is to only adjust them when the engine is cold, you wont get the right lash on the valves if not. they might be to tight or loose, if the engine is not cool.
You have to remove VVA. Its a general tune-up #1cyl at TDC adjust: Intake valve: 1, 2, 4 Exhaust valve: 1, 3, 5 Injectors: 6, 3, 5 #6cyl at TDC adjust: Intake valve: 6, 3, 5 Exhaust valve: 6, 2, 4 Injectors: 1, 2, 4 You gotta use a feeler gauge for the valves and a pin tool (looks like an alen wrench)...(I don't remember the specs, so you'll have to fine those yourself) For injectors your need a special tool (timing pin) to adjust the height (there is also a spec for that) You'll need a pin tool for the valves and injectors plus wrenches to tighten the nut after the adjustment. Valves: loosen up the nut, put the feeler gauge between the rocker arm and the valve, turn the alen wrench till the rocker arm reaches the feeler gauge...make sure the feeler gauge is kinda loose between them but tight...then tighten the nut (there is a torque spec) Injectors: loosen up the nut, set the timing pin on top of the injector, turn the ajustment screw w/ alen wrench till timing pin reaches a lil notch, then tighten the nut till it's tight (also need a torque spec) Afterwards you'll need to adjust VVA... I'm giving you somewhat of a general idea. If you are attempting to do this, you should get a manual.
