It just started smoking yesterday on start up. Started just a few minutes ago and a large puff of blue smoke. I dont run this truck hard hell im 61 my hotrod days are over. What would cause this? I run amsoil 10-30 and have for 3 years. I bought it 2nd hand at 78k it now has 91k.
Thanks for any help.

Edited November 12, 20213 yr by jlwelding

Blue smoke on startup is generally valve seals

Valve guides too. If the valve guide wear a bit and the valve is rocking in the guide then the seal could be wiped out from it.

 

Sad to say synthetic oils do not promise no wear or seal failures. Kind of like my transmission, its had synthetic oils (Mopar, Valvoline and Mobil) its entire life still manged to eat the hard face out of gears and break teeth off. I'm at 436k miles now... 

Edited November 12, 20213 yr by Mopar1973Man