The 2SZ-FE uses a timing chain. If you are doing a rebuild, correct alignment is critical to prevent catastrophic valve damage.

Replace the VVT-i cam gear assembly and install an updated Toyota OEM timing chain tensioner. 3. Excessive Oil Consumption

: Proper lubrication and cooling are vital. According to technical data from Automoli , the 2SZ-FE requires approximately 3.2 liters of engine oil and 5.1 liters of coolant for a full system refill.