How to hand crank over a 250H Cummins?

[braddrummond]

Starter was fried on my M923. New starter arrives tomorrow and I want to be sure the motor turns over freely before trying the new starter. Any precautions or tips for cranking it over?

Thanks
Brad

 

[patracy]

Pull the injectors and turn it over?

 

[trukhead]

Take the valve covers off and lever open and secure the exhaust valves.

 

[patracy]

Take the valve covers off and lever open and secure the exhaust valves.

That's a good way to introduce Mr. Valve to Mr. Piston.

 

[Tow4]

You can turn it over using a breaker bar and socket on the pulley right below the power steering pump. I don't remember what size socket. You don't need to pull the injectors.

 

[patracy]

That's true as well. But due to the compression, you could possibly damage something if you hit rust (rings) before knowing it if you're on a compression stroke.

 

[Tow4]

I doubt it, the compression goes past the rings easily at breaker bar cranking speed. You can only move the bar a small amount each time; if you come to a hard stop, you'll know it.

 

[Hoefler]

Wear a cup and a helmet.
Pete

 

[Csm Davis]

God I love you guys, pull the emergency shutdown and turn away you will not start the engine or damage it. That's how you turn it to set the valves for a tune up.

 

[braddrummond]

Tech manual lists the tool made to crank it over. Looks like the local auto parts store has it. I'll pick it up tomorrow and give it a try.

 

[braddrummond]

Anyone tried a cummins barring tool?