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2010 HINO 258 Burns Oil

likemlow

Active Expediter
Mechanic
Hi all, our Hino started burning oil excessively recently. Around 5qts a week running 24hr shifts. When we replaced the injectors a compression test was ran. The results were on the low side but still with in spec. That was only a few months ago. Anything I can look for?? Thanks for any input!
 

greasytshirt

Moderator
Staff member
Mechanic
There are few places it can be going. The turbo and air compressor are possibilities. These engines can also leak quite a bit. How many miles are on it?
 

likemlow

Active Expediter
Mechanic
It's at 600k now. We've repaired all external leaks. I'll take a look at the compressor and turbo and report back thanks!
 

likemlow

Active Expediter
Mechanic
We looked at both the Turbo and the Air compressor and they both look fine. We found the crankcase vent line to the intake tube really oily. It has what appears to be a crankcase "filter" Housing with no filter in it. That also has oil in it. Is this a sign of excessive crankcase pressure? Or is something wrong with the "housing"?
 

greasytshirt

Moderator
Staff member
Mechanic
Yes, there's no filter in that housing. It's normal for oil to be in that system.

You've ruled out all of the regular suspects and it looks like the base engine is the culprit. The compression is a little low, like you said. It probably needs to be rebuilt at this point.
 
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