Jake-Brake/Engine fan engaging

Even Cummins website mentions that the engine fan can rob you of a minimum of 50hp for smaller engines and upwards of 225hp for their larger industrial engines the fan spins while the engine is on but doesn't fully engage till the clutch kicks on, there's a reason why you're able to program the fan to come on with the Jake brake and there's a reason why the rpms will drop twice as fast with the engine fan on manual, and if there's no resistance on the engine when the fan kicks on them you probably have a bad fan clutch and just never noticed

 

So you think once a post is made no one will ever come across it again in the future? Lmao

 

Have never had an engine overheat while engine braking, if you're having that problem I'd suggest replacing the O rings on your cylinder liners cause you probably got a coolant leak lmao, even going down smasher hill with 100k plus have never had the temps reach over 180

 

I didn't say overheat. A jake turns an engine into a giant air compressor, and last time I looked, any air compressor with a 500hp input had a cooling system on the compressor.

I would suggest that if the jake isn't warming up the engine in low speed / high load conditions, that your thermostats aren't properly closing. Because that engine is still doing work.

 

Apparently, the humor was lost on you.

 

He's a little sensitive.