I am I had a c15 rebuilt it has 40 thousand miles on it now iam getting a lot of crank case pressure if I don't keep tie

Customer: Hi I am pat I had a c15 rebuilt it has 40 thousand miles on it now iam getting a lot of crank case pressure if I don't keep tie raps on front filler cap it blows out going down the road lost the first won no chain bought new one . a lot of people told me it was the turbo I took it off and ran the truck still have it took it to cat 2 times . 1st time they said it needs a cam and crank sensor. did not do it . 2nd time they gave me a oil consumption sheet to fill out for one month. only on my third oil change now. the motor uses 1 gal. in 800 miles . from picking up the truck and 1st oil change it used 5 gals. the are giving me the run around
JA: We'll do all we can to help. Is there anything else the Heavy Equipment Mechanic should be aware of?
Customer: the dealer I brought the truck from took it to get rebuilt. in Knoxville tn. the block was taken out of the truck for maching on sleeve stops but taking turbo off the gaskets were not new. I payed for a new clutch also tomorrow I am going to pull cover and look at it to make shore it was done something is not adding up hear.
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Heavy Equipment Mechanic about your situation and then connect you two.