I have a 97 beaver with a 3126 cat. It blows massive smoke out the case breather tube. RV will die after an hour from low oil due to heiu pump not having enough oil to create fuel pressure.
I just figured that out. Motor runs great. Starts great. Uses maybe a quart every ten miles and thats conservative estimate. its got 30k on it. at first before i associated the oil loss with the smoke i was hopping for water in gas which wouldnt combust and cause the smoke. now that im aware its eating oil and keeping in mine the 30k miles (good rings?) im praying for a solution with the huei pump dumping oil in the fuel or a bad turbo maybe like the oil induction or return line dumping oil into the intake during forced induction. i cant see a cat motor with 30k miles having rings bad enough to dispurse oil at a rate that is quite frankly unheard of. im a youtube mechanic but i aint skered and ill tear this motor apart by myself. i know dave is the best of the best and always leans towards cat certified repairs but ladies and gentleman this is covid season and i can not afford it. does anyone (including dave) have some input on this? this thing is beautiful and runs amazing it just smokes like a siv and eats oil faster than gas literally.