looking for some advise from some seasoned veteran drivers. i currently own a 2007 int 9400 with isx. currently have about 3000 miles under 1.2mil. just started experiencing oil leaking from blowby tube while under a load but not while empty. currently i loose about 2 to 3 gallons a week depending on my driving habits while loaded. i am guessing we are getting close to that time to replace or inframe this truck. i check my mpg at every fill and average is 6.5 mpg. my questions are how much longer can i get out of this engine. should i just invest now in fixing it or get the most i can out of it..oil pressure is about 37lbs just after a service and around 32 lbs just before. my second question is inframe or reman..got a quote from dealer for $45000 for reman engine trans and clutch with radiator and air charge cooler. cummins says $38000 for reman engine and clutch..or then i found a shop who will inframe engine with new cams radiator and air charge cooler plus reman trans and clutch for $29000. dealer offers 1yr warranty parts and labor. cummins 2yr parts and labor. shop 1yr 100000 mi warranty parts and labor. i am able to swing either of the three but need to know witch one makes the most sense. thanks for the help
I would have a Dyno and a blowby test done to see if it really needs to have an overhaul or something else is causing the oil to be ejected.
i ran into a old timer and he told me it could be the turbo building to much pressure in the crankcase and taking oil with it through the tube. im not sure i have ever heard of a turbo being the blame for something like this.
i second the last comments. i will also add iv seen guys running trucks that have a ton of blowby adding a gallon every day. and they say oil is cheap just run it. get another year out of it before they in frame. not what i would do but iv known guys to do it.
well i dont mind going through three gallons a week if i can squeeze another year out of her. i would just hate to throw a rod or something and ruin the block.
I'm sure you're looking at the Crank Case Vent Tube when idling? Bet there's a fair amount of blowby/oil dripping out of it? All this said...the signs are there. If you plan to continue running the truck I'd consider "Cummins" doing the work. IMO.
the wife says the same due to the extra year of warranty. also the entire bottom of the engine and undercarriage are soaked with oil. no dripping during idle and very minnimal smoke.
I wouldn't rebuild right away, keep pulling oil samples and when you do why are you doing clutch and tranny? I would Waite on them unless they are giving you problems also. Definitely have cummins do the rebuild.
