Detroit Series 60 Issue

Maybe I'm not getting it, but I am scratching my head wondering why you want to smoke. I've got a 6NZ with a 650 file in it I can't make it smoke but it runs really good.

 

If it has the original radiator I would replace it. You can try and clean it but it is probably too dirty. Had a guy that had a Freightliner Classic that was doing the same thing. New radiator and he said the fan hardly ever came on after that.

 

Put it on a dyno!

 

What kind of manifold pressure does it push, and what is your parameter running? I don't think radiator or water temperature would have anything to do with the mufflers but you can tell real quick if you have a air air leak or if you have any kind of an exhaust problem by your perimeter and your manifold pressure

 

First check it’s not blowing bubbles and just beginning to have a head gasket problem. Check it at idle, then at 1800 RPMS, believe me it happens sometimes unfortunately. Then maybe always disconnect the long flex pipe at the elbows. It’ll be loud. Run it out. Mufflers could be rotted out. Take one off shake it. You’ll hear it rattling if it’s crumbling inside. Rattling? Replace them regardless. Radiator or one stuck thermostat. Radiator plugged, it’ll get a lot hotter under a load and/or hill. Oil/water difference should be 20 degrees, check that too. That’s all I know to do before spending money chasing a demon. Maybe I’m wrong, but clogged mufflers on any engine, it’s going to big down the higher RPMs and longer you run it. Rule out air filters of course. the CAC, and all hoses, including the one from air compressor to intake manifold.

 

You're assuming it's OK? How old is it? Can you see light through the fins?

You want smoke? Put a hole in a CAC hose

 

What temperature thermostat is in it? I have almost same set up, with 180 thermostat - it stays right there.

New stacks and air filters are fairly cheap. I put 7” Lincolns on mine and it lowered pyro temps, and sounds better. Smokes on start up and cold.

Mine is GK - not BK.