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I have a 2003 ism without egr that looks like it's leaking from the rocker box on pass side towards the back.

I also have a 2007 ism with egr that is leaking from front of engine on pass side area. There is oil around some harness that looks like it goes in motor.

Does anyone know how long it takes to change the rocker box gasket on a egr vs non egr motor. And is there any special tools needed.

Thanks



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Don't rule out excess crank case pressure. There is a reason they get leaky.

If its just the jake spacer, it's a pretty simple job. If it's the rocker lever housing, then the injectors and rockers need to come out. You'd be looking at about a day and a half for a rocker lever housing.