hi,
recently i have gone through the loss motion spring upgrades.

the engineer broke 4 screws (the black screws) when opening the engine trying to replace the loss motiong springs. On top of the screw were written number 12. those screws were later replace by another similar sized silver screws which on top of the screw were written number 10.

is it safe? how will it effect the engine?

valve timing was done manually, without any computer aids. the engineer used some sort of metal instruments that looks like a very thin plate to adjust the valve, and tighten the bolts.

is this how valve timing were done correctly?

its kinda bothers me that they are not using any computer to to the adjustments.

fuel consumption has increased a bit, engine feels tighter, less vibration and clicking sounds. 12.3km per litre, has dropped to 10.3km per litre.

do help...