Ive got a LITTLE problem with my truck blowin oil out of the crank case bleed tube at WOT. Ive been told that all diesels will do this, especially if you drive em hard and load em heavy like Ive been known to do but there is enough oil blowin out to basically cover the undercarriage and tailgate of my truck &gt;.<br> This has only become a problem since I have started pushin more fuel through, via my 370s and 3k gsk and I dont see as much blow by if I keep my rpms low (under2500).Could I possibly have a weak valve spring... or six? I need to figure out how to fix this because Im havin to clean my truck every other day to keep the oil off the paint :'(. Any help would be appreciated.<br> Wheels

 

How much oil are you using per 1000 miles?

 

Probably a quart or two.

 

Check your vacuum pump, it will also do it. The exaust from the vacuum process can get into the crankcase. Mine does this. Cummins told me about this problem. I had a vacuum leak and that fixed cut it down enough to be passable. One day I need a new pump. I also have a power steering leak that does a lot worse, check at the back of the pump and see of the steering leaks. I only have to fill it every couple of thousand, but it soaks the bottom of the truck.

 

How can I tell if my vacum pump is bad and is it hard to fix?<br> Wheels