Hello Everyone and Good Morning,
I am Raza from Karachi, Pakistan and need your help , I have a Toyota corolla 2010 altis automatic that came with 1zzfe engine, i bought it used and driven for 65000 km as per the odo, god knows how true was that, soon after buying i changed the engine oil to 5w40 as per the recommendations of the owners, the cars drive improved a lot but developed a complain of occasional low oil pressure error and spontaneous turning off at lower RPMs with no problem whatsoever while driving, however 1 year down the lane the car developed complain of engine knocking, vibration or rattling sound while accelerating and a grunt when the gas pedal is floored, no sound is heard at idle rpm it also has experienced loss of power and acceleration, it easily touches 150+ kph but struggles while reaching, there is no smoke , it also decreases coolant, of which reading online have found to be due to faulty water pump because it has a rattling noise on startup that disappears through out the day.. now my mechanic has said that the problem is of the connecting rods or crankshaft and the whole engine needs to be opened and overhauled, erstwhile majority of people have recommended engine swap, i am a non technical person as far as automotive knowledge is concerned but the problem here in Pakistan is that majority of mechanics and automotive technicians have no formal technical knowledge, they just go by trial and error , which i am not fond of.. this engine has multitude of components that can go wrong.. i need your advise. .
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