Visible smoke

After the timing belt & clutch assembly was changed, a white/bluish tailpipe smoke is visible and it smells too. There’s a little smoke from the engine block too. Can somebody help me on this? thanks.

What year is your Corolla? Did you do anything other than clutch and timing belt?

model 1996. actually tune-up and oil change was done 5 days before the clutch and belt was fixed. mileage is 135K, engine performance is still good.