good day to all tsikoteers. Tanong ko lang po kasi napansin ko po sa 96 Isuzu TFR pickup ko 4Ja1 ang engine following observations:

1. May lumalabas na usok sa lagayan ng oil at sa dip stick.
2. Timitilamsik po oil pag binuksan lagayan ng oil habang umaandar.
3. parang kulay puti po usok at mabaho po amoy.

Ano po kaya problema at pano solusyonan ito? Does it need overhauling? will top hauling solve it?

i hope guys you could give advice and help me with these problems. any help will be appreciated. thanks in advance.