OK, I drive a 1991 Crown Vic with the drivetrain from a 1988 Mustang, including the HO 5.0, and I'm having a little oil consumption problem with the mileage-unknown motor I'm using.
It's been this way since I got it, I just want to know if it's normal for an old HO to blow a little dark-colored smoke when it's revved before it's warm. I understand the 85-92 HOs have forged pistons, does that mean they expand more than castings and will allow some blow-by until the engine warms up? I have no knocking, and strong oil pressure, I just don't know if I'm due for a rebuild or should just ignore it. My pipes are a little sooty too, but the only engine code I have is 67 (my car was looking for a neutral safety switch, which I don't have)
4k#Fe
It's been this way since I got it, I just want to know if it's normal for an old HO to blow a little dark-colored smoke when it's revved before it's warm. I understand the 85-92 HOs have forged pistons, does that mean they expand more than castings and will allow some blow-by until the engine warms up? I have no knocking, and strong oil pressure, I just don't know if I'm due for a rebuild or should just ignore it. My pipes are a little sooty too, but the only engine code I have is 67 (my car was looking for a neutral safety switch, which I don't have)
4k#Fe