Blue smoke
 

Hey guys need some help I have a 06 cummins got a rebuilt engine 50,000 miles ago n new injectors as well n this morning when I turn on my truck I saw blue smoke on my exhaust for like 30 seconds what could it be

It's not unusual for these engines to haze a bit on initial start up until they warm up a bit

It also has a rough idle for those 20 to 30 seconds

oil leaking into the cylinder will make blue smoke cause: Valve seals worn valve guides.

Thanks dangerous1965

Around how much would it cost to change them

Around how much would it cost to change them

You can do it yourself with a spring compressor might as well put a good set of springs in it to! Cost to have a shop do it not sure but under 500. I hope! Alot of work to get to them!

O ok thanks