Diesel fuel in oil 04 truck - further

From : steve martin

Q: thanks for the advice everyone the truck doesnt idle much at all - mostly highway driving and i havnt even started to haul much yet. the oil level rises quickly then starts to dump out the entire bottom of the truck is now covered with diesel and oil. economy is variable when the oil gets diluted the economy goes down about 14 - 16 mpg. also - oil pressure has always been great - even when diluted and no knocking in the engine so i think the bearings are ok so far. tom lawrence wrote this out - only 5000 miles on it. they tell me they checked out the injectors replaced the head and now are replacing the injector pump. it sounds like they have no clue what theyre doing. replaced the head last i checked fuel doesnt flow through the head. its possible the pump could be leaking and letting fuel get into the front cover and therefore the oil but its more common that one or more injectors is leaking and dumping way too much fuel into the cylinders. you say the oils getting diluted with fuel. does the level in the crankcase rise or is it the same level but just diluted with fuel whats your fuel economy like do you idle the truck for long periods of time if it were me id ask firmly but politely that a new engine be procured and installed because of possible damage done to the internals due to the oil dilution. barring that id ask that they allow the truck to be taken to an authorized cummins dealer for repair since theyve already had three shots at it and havent fixed it assuming the injector pump swap doesnt cure things. there have been a few very few reports of leaking injectors over at http//www.turbodieselregister.com - ive never seen a report as bad as yours sounds though. .

Replies:

From : roy

thanks for the advice everyone the truck doesnt idle much at all - mostly highway driving and i havnt even started to haul much yet. the oil level rises quickly then starts to dump out the entire bottom of the truck is now covered with diesel and oil. economy is variable when the oil gets diluted the economy goes down about 14 - 16 mpg. also - oil pressure has always been great - even when diluted and no knocking in the engine so i think the bearings are ok so far. not to rain on your parade but what happens with fuel dilution is it wipes the bearings and then things will get hot real quick. once things get hot a couple of things may happen the engine will seize throw a rod or a crankcase explosion will occur. tow the truck to cummins and get a visgage reading and have it properly diagnosed and repaired if it can be repaired. as tom said at this stage id be screaming for a new engine. he said to ask firmly. sorry. roy .