So I took my car to a mechanic to do the whole VVT and timing chain job, I gave him the parts and he replaced them. After taking the car home, the dreaded P0012 Timing over-retarded check engine light lit up again and the engine was kinda noisy. But the mechanic said that I should drive it for 300-400 miles and see if it quiets down. I drove the car for 50 miles and the noise got 10 times louder, now it sounds like an old diesel truck. The car pulls, but this doesn't sound healthy to me.
Can it be the hydraulic lifters?
Can they be removed and cleaned instead of buying new ones?
Can they be removed without removing the engine head?
What is weird to me is after the chain job this noise appeared, before it was working like a swiss clock, but I did the VVT job because the VVT was broken and because of the stupid P0012 DTC.
Turns out it would've been better if I didn't change anything
Things that were changed:
1 L3K9-12-4X0C-9U: Variable Valve Actuator
2 L3K9-12-429: Washers
1 LF01-11-406: Crank Shaft Pulley Lock Bolt
1 9XG0-99-667L: Blind Plug
1 L3K9-12-201A: Timing Chain
1 L3K9-10-230: Valve Cover Gasket
14 LFBL-10-237: Valve Cover Bolt/Grommet
1 L3G6-10-602: Oil Seal
3 L3H5-11-407: Lock Washers
1 0000-77-1217-ES: Gray Silicone RTV
1 L3K9-10-193: RR Gasket
1 L3K9-13-ZE5: O Ring
New tensioner, new OCV
Oil and filter (Liqui Moly 5W-40 fully synthetic)