Crack the bolts loose with a T30 Torx bit and leave two in place on the opposite sides of the arrow so the spring doesn't go flying.
Hold the cover of the actuator in place with one hand and remove the remaining bolts. Slowly remove the cover making sure to not drop the spring.
Once the cover...
If your car suffers from the infamous cold start rattle, that means your VTC actuator has gone bad.
The bad news, you have to fix it before it causes further damage to the rest of your engine.
The good news, the fix is £20 and takes about an hour of time plus some basic tools.
Things needed...
Noise randomly appeared after taking the valve cover off to replace the VTC spring and check valve clearances. Nothing has been dropped into the engine, runs perfectly fine and and shows no codes.
It's interminnent, seems to come and go on it's own regardless of engine temperature. Frequency...
For anyone looking for info in the future, CU2 with OEM Deltas (R18/+55/7.5j) clears +20mm in the rear and +15mm in the front, could go 5mm wider with rolled fenders.