swapping 14L for 12.7 ddec V

So what’s a downdraft tube? Exhaust? I’m lost. Do you have a grass burner on it? What year is it? What make? Just curious.

 

Sounds like a ddec5 14L. Down draft tube is another name for blowby pipe.

Sounds wore out to me. Some guys run a rubber hose on the tube extending it closer to the ground. It makes less of a mess this way. Or put a catch can on the blow by tube. If your only running 10,000 a year I would probably just do that for now.

 

Ok, I thought egr valve eliminated the open blow by tube. I ran a big plastic hose on mine back to the rear axle. Sometimes it looked like my brakes were smoking. Still made an oily mess. I see a lot almost touching the ground. Without spending a ton at Pittsburgh power, one could be made. My long hose froze up once, in a snow storm, pushed 6 gallons out of every seal on the engine!! Shut it down in a Dock. That looked like a catastrophe. Lol. Engine still lasted another year. I wondered if maybe he was slobbering oil or diesel from exhaust.

 

Yeah early egr detroits and cummins have blow by tubes my friend. They do indeed always puff smoke even with low miles.

 

12.7 Ddec 5 with egr and compact gear train were mass produced. 14.0L ddec 4 with non egr were produced. Dont listen to half the info in here. The older 12.7l Ddec4 for bull gear was fine, just had to keep a eye on hub bearings around 800k miles.

You would be cheaper to over haul current engine than a swap. But I would insist on replacing head. Its were the problems lie in a high mileage egr detroit. Im not a fan of installing a used engine. But everyone is different in how they gamble.

I would overhaul current engine with a mindful budget. Then look to a tune and maybe a gear change to add milage. 14l vs. 12.7

 

On your break in theory nowadays a lot of people do a dyno break in which helps a bunch.

 

I agree with this, ring material has gotten harder. You will find some liners wear more than the rings nowadays.