Sir Dieseldude,

Update on my problem, sir my engine is a pajero 4m40 and may lumalabas na usok sa breather ng eninge which is connected sa air filter (when I removed it). When I opened the dip stick oil. May lumalabas din na usok pero minsan wala naman. This is engine blowby (combustion gasses which leak past the piston rings). Blowby is normal, low on new engines and steadily increasing as the engine ages due to normal wear on the rings.

I have no problem with power. Mahatak naman sha and Hindi hard starting pag umaga. Good.. Last february pina-"dukot" ko sha. I changed my piston rings and pinaover sized ko. Nag rebore ka ba ng cylinders?

Does my engine need an overhaul or kaya mawala ung black smoke if i will calibrate my injection pump? Check/replace air filter muna. Then compare smoke levels with and without the blowby hose connected to the air intake system.